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. 2026 Jan 5;28(1):62. doi: 10.3390/e28010062

Correction to the Entropy of a Charged Rotating Accelerated Black Hole Due to Lorentz Invariance Violation

Cong Wang 1,*, Hui-Ying Wang 1, Shu-Zheng Yang 2
Editors: Qingyu Cai, Baocheng Zhang, Christian Corda
PMCID: PMC12840472  PMID: 41593969

Abstract

In the spacetime of a charged rotating accelerated black hole, the dynamics equations of fermions and bosons are modified by Lorentz invariance violation (LIV). The correction effects of LIV on the quantum tunneling radiation of this black hole are investigated. New expressions for the quantum tunneling rate, Hawking temperature, and Bekenstein–Hawking entropy of this black hole, which depend on the charge parameter and acceleration parameter, are derived, incorporating LIV correction terms. The physical implications of these results are discussed in depth.

Keywords: charged rotating accelerated black hole, LIV correction, Bekenstein–Hawking entropy

1. Introduction

In the four fundamental forces of physics, the strong interaction, weak interaction, and electromagnetic interaction are described by the Standard Model of particle physics, while the gravitational interaction is described by general relativity. Gravitational interaction is much weaker than the other three forces. Moreover, gravity is a non-renormalizable theory, and thus, there remains a fundamental contradiction between gravity and quantum theory that has yet to be resolved. In order to study quantum gravity theory and the Grand Unified Theory in physics, a series of meaningful studies have been conducted on modified gravity theories, including string theory, Einstein-aether gravity theory, and Horava–Lifshitz gravity theory. Some quantum gravity theories suggest that Lorentz symmetry may be broken at high energies, which implies that by considering Lorentz invariance violation (LIV), one can study the renormalization problem of gravity. In high-energy physics, Lorentz symmetry breaking indicates that Lorentz symmetry is restored at low energies and satisfies the results of current scientific experiments. This theory includes the Horava–Lifshitz gravity theory and the Einstein-aether gravity theory. These gravity theories are modifications of Einstein’s general relativity. The study of the effects of Lorentz symmetry breaking can be divided into three aspects: one is the investigation of gravitational experiments at short distances. Models of the differences between gravity and the other three forces predict deviations from Newton’s law of gravitation at short distances [1]. Existing short-distance gravitational experiments have placed constraints on the Lorentz invariance violation coefficients at the level of 108m2. Research in this area is still ongoing. In flat spacetime, Lorentz symmetry is global, whereas in curved spacetime, Lorentz symmetry is local. Studies of quantum gravity theories suggest that Lorentz invariance is violated at the Planck scale, which opens a window for exploring new physics while detecting Lorentz violation. Experimental studies on detecting Lorentz-breaking in curved spacetime can facilitate research on dark energy and astronomical observations related to it. Another aspect is modifying the Einstein gravitational action by adding a Lorentz-breaking correction term. By studying the solutions of the gravitational field equations, new expressions for the spacetime metric containing the Lorentz-breaking correction coefficients can be obtained. This type of modification is a correction to the curved spacetime background [2]. The third method for studying the LIV effects in curved spacetime is to modify the action of scalar and spinor fields in curved spacetime and then variationally calculate the corresponding particle dynamics equations for the action with the Lorentz-breaking correction term. Based on this, the quantum tunneling radiation characteristics of black holes and related topics are investigated [3,4]. For spinor fields, another method of modifying the spin-1/2 fermion equation is to directly add an LIV correction term to the left-hand side of the original Dirac equation. Based on this, the modified spin-1/2 fermion dynamics equations and related topics can be studied according to different characteristics of curved spacetime. The research presented in this paper adopts this modification method to investigate the correction to the entropy of a charged rotating accelerated black hole. This is a topic that has not been deeply explored yet. Both the accelerated motion of black holes and the accelerated expansion of the universe are areas worthy of further study. The mechanism of the universe’s accelerated expansion is explained by the presence of dark energy, and thus, research has been conducted on spacetime metric features and related topics in the case where a quintessence field exists around black holes [5,6]. Recent astronomical observations suggest the presence of an axion dark energy model in the universe. These new findings indicate that the universe undergoes both accelerated expansion and contraction, which implies that the accelerated expansion and evolution of the universe remain areas worthy of further study. The mechanisms of accelerated motion in black holes and related research are another important topic of interest. The acceleration of black holes is related to cosmic strings. In recent years, there has been research on the thermodynamics of accelerated black holes and related topics [7,8,9,10]. Reference [3] also studied the thermodynamic evolution characteristics of charged non-rotating accelerated black holes. The novel aspect of this paper is the consideration of the LIV and Einstein-aether theories in the correction of the entropy of a charged rotating accelerated black hole. As a result, a series of new and meaningful findings will be obtained.

In the following Section 2, we will present the correction results for the entropy of a charged rotating accelerated black hole due to LIV. In Section 3, we will introduce the correction to the scalar particle dynamics equation in the spacetime of a charged rotating accelerated black hole according to the Einstein-aether theory, as well as the resulting correction to the black hole’s entropy. Section 4 of the paper will provide an in-depth discussion of the results obtained in this study.

2. LIV Corrections to the Temperature and Entropy of a Charged Rotating Accelerated Black Hole

A charged rotating accelerated black hole is described by the C-metric as [10,11,12]

ds2=1H2f(r)dtαasinθdϕK2f(r)dr2r2g(θ)dθ2g(θ)sin2θr2adtαr2+a2dϕK2 (1)

In this C-metric, M represents the mass scale of the black hole, A denotes the acceleration, and K represents the conical deficit of the spacetime. The parameter corresponds to the negative cosmological constant, given by σ=32, and α represents the parameter responsible for the rescaling of t. Equation (1) contains

f(r)= 1A2r212mr+a2+q2r2+r2+a22g(θ)= 1+2Amcosθ+(Ξ1)cos2θΣ= 1+a2r2cos2θH= 1+ArcosθΞ= 1+2A2a221A22 (2)

The non-zero components of the electromagnetic potential Aμ generated by the charge q of this black hole at the event horizon r+ are respectively:

At= qr+r+2+a2αAϕ= qr+asin2θr+2+a2α (3)

Based on Equations (1) and (2), the corresponding determinant of the metric gμν can be calculated as:

g=r2+a2cos2θ2α2K2H8sin2θ (4)

From Equations (1), (2) and (4), the contravariant metric tensor can be calculated as:

guν=gtt00gtϕ0grr0000gθϑ0gϕt00gϕϕ (5)

where,

gtt= H2α2r2+a22a2sin2θr2f(r)f(r)g(θ)r2+a2cos2θ2grr= f(r)H2gθθ= g(θ)H2r2gtϕ= gϕt=H2aαKr2f(r)g(θ)r2+a2f(r)g(θ)r2+a2cos2θ2gϕϕ= H2K2r2f(r)a2sin2θg(θ)sin2θr2+a2cos2θ2f(r)g(θ) (6)

Equation (6) described non-zero components of gμν. The event horizon of this black hole is determined by the following null hypersurface equation.

gμνfxμfxν=0 (7)

Substituting Equation (6) into Equation (7) gives the equation that the event horizon r+ of this black hole satisfies:

fr+=1A2r+212mr++a2+q2r+2+r+2+a22=0 (8)

From this equation, it is clear that the event horizon r+ of this black hole is related to M,A,a,q,. The curved spacetime described by Equation (1) possesses a Killing vector ϕ. Since g(θ) is related to cosθ, the two-dimensional line element dsθϕ2 at the north pole (θ+=0) and the south pole (θ=π) on the event horizon are not the same. This difference is what makes this accelerated black hole unique. To explain the acceleration mechanism of this black hole, it is necessary to clarify the cause of its accelerated motion. Physically speaking, the energy-momentum tensor of physical entities that can interact with the event horizon of this black hole satisfies the condition T00Trr in the local region. The physical entity that satisfies this condition is a cosmic string. The energy-momentum of the cosmic string is dominated by its mass per unit length, and the string’s tension is numerically equal to this energy [13]. The gravitational effect of a cosmic string does not generate long-range curvature in spacetime but induces a global conical defect on the spatial section perpendicular to the string. Therefore, we can consider the cosmic string as essentially a localized conical deficit in spacetime. It is this conical deficit that drives the accelerated motion of this black hole. This is the fundamental reason for the accelerated motion of the black hole, with the acceleration parameter denoted by A. From Equation (2), it can be seen that A affects f(r), and this effect manifests as an influence on the cosmological constant. The effect of A on g(θ) primarily reflects the range of values for A. Therefore, we can impose the condition A<1, which better reflects the variation in g(θ). According to Equations (1) and (2), the regularity of the metric at a pole requires that K± be as follows:

K±=gθ±=1±2Am+2A21+a22a22 (9)

If θ=0 is fixed with K±=K along the two-pole axis, given by [7,9,14]

δ=2π1g(θ)K+=8πmA1+2Am+2A21+a22a22 (10)

The deficit angle of the conical defect is interpreted as being due to the cosmic string. We can consider the tensions of the strings along each axis as μ±=δ±/8π, that is

μ±=141Ξ±2mAK (11)

Here, the + sign corresponds to the north pole, and the − sign corresponds to the south pole. μ± is interpreted as a cosmic string emerging from the black hole, causing it to accelerate. Knowing the reason for the accelerated motion of this black hole and the basic characteristics of the curved spacetime, we can study the thermodynamic evolution of this charged, rotating, accelerated black hole.

In the spacetime of this charged, rotating, accelerated black hole, the equation for spin-1/2 fermions is the Dirac equation, which is given by:

γμDμ+mDψ=0 (12)

where,

Dμ=μ+ieAμ+Ωμ (13)

where Ωμ is the spin connection in the curved spacetime. It is given by Ωμ=i2ΓμαβΠαβ, Παβ=i4γα,γβ. In the spacetime of the charged, rotating, accelerated black hole described by Equations (1) and (2), and considering LIV corrections, we propose modifying Equation (12) as [15]:

γμDμ+mDζγtDtγjDjψ=0 (14)

The term ζγtDtγjDjψ in Equation (14) represents the LIV correction written according to the contraction rules for differential and tensor free indices in general relativity. The coupling constant ζ1. In fact, Keuglov considered LIV corrections in flat spacetime and introduced a correction term ζγtDtγjDjψ, which modified the Dirac equation [15]. When extending this to curved spacetime, the LIV correction term we choose must be as shown in Equation (14). mD in Equation (14) is the mass of the Dirac particle. ψ is the wave function of the spin-1/2 fermions. γμ is the gamma matrix in the curved spacetime described by Equation (1). The γμ matrices are required to satisfy the following commutation relation:

γμγν+γνγμ=2gμνI (15)

The γμ matrices that satisfy Equations (1) and (15) are given as follows:

γt= gttI00Iγr= grr0σ1σ10γθ= gθθ0σ2σ20γϕ= gtϕgttI00I+gttgϕϕgtϕ2gtt0σ3σ30 (16)

The Pauli matrices ai are expressed as follows:

σ1=0110, σ2=0ii0, σ3=1001 (17)

According to the WKB semiclassical approximation theory, we can express the wave function ψ in Equation (14) in terms of the particle action S as follows:

ψ=ABeiS (18)

Substituting Equation (18) into Equation (14), we can obtain:

iγμμS+eAμ+mD+ζgtϕtS+eAtϕS+eAϕAB=0 (19)

In Equation (19), γμ is a 4 × 4 matrix, and A and B must be 2-dimensional spinors. In the above equation, γμ is a Hermitian matrix. The solution of the matrix equation can only be guaranteed to have physical significance if the matrix is Hermitian. In Equation (19), there is a term that contains the imaginary unit i, and another term related to gtϕ. In order to solve for the particle action S, we need to correctly choose a transformation related to gtϕ and γμ based on the characteristics of the stationary spacetime. Therefore, we need to introduce a matrix transformation based on the characteristics of the stationary, axisymmetric black hole spacetime as follows:

Γμ=γμiζtS+eAtγtγμ+ϕS+eAϕγϕγμ (20)

From this, it can be concluded that:

ΓμΓν=γμγνi2ζtS+eAtγtγμγν+ϕS+eAϕγϕγμγν+Oζ2 (21)
ΓμμS+eAμ=γμμS+eAμiζtS+eAtγt+ϕS+eAϕγϕγμμS+eAμ (22)

Substituting Equation (22) into Equation (19), we obtain the spin-1/2 fermion equation in the spacetime of the charged, rotating, accelerated black hole as:

iΓμμS+eAμζgtttS+eAt2ζgϕϕϕS+eAϕ2ζgtϕtS+eAτϕS+eAϕ+mDAB=0 (23)

This is a matrix equation, and in fact, it is an eigenmatrix equation. The Γμ in Equation (23) is related to γμ. From this equation, we see that the AB is a 4 × 1 matrix and both A and B are 2-component spinors. The wave function ψ represented by the semiclassical WKB approximation theory is meaningful. The four terms inside the left-hand bracket of Equation (23) that are independent of Γμ are all related to scalars. In the matrix equation Equation (23), mD can actually be expressed as mDI00I, where I=1001 is a 2 × 2 identity matrix, and the other three terms can be expressed in a similar way. The first term inside the left-hand bracket of the equation no longer has free indices because the upper index μ and the lower index μ have already been contracted. Therefore, this term can also be expressed as a term involving a 4 × 4 identity matrix. We denote the term inside the left-hand bracket of Equation (23) as G, we have

GI00IAB=0 (24)

That is

GI00GIAB=0 (25)

This matrix equation is an eigenmatrix equation. For this equation to have a non-trivial solution, we must require that the determinant of the matrix GI00GI is zero, that is,

detGI00GI=0 (26)

From this equation, it can be concluded that

G4= iΓμμS+eAμζgtttS+eAt2+gϕϕϕS+eAϕ2gtϕtS+eAtϕS+eAϕ+mD4=0 (27)

So, we obtain the following equation:

iΓμμS+eAμζgtttS+eAt2+gϕϕϕS+eAϕ2gtϕtS+eAtϕS+eAϕ+mD=0 (28)

The first term on the left-hand side of Equation (28) contains the imaginary unit i. To solve this equation, we use the relationship between Γμ and γμ, as shown in Equation (20). By multiplying both sides of Equation (28) by iΓν and utilizing the relation between γμ and gμν given in Equation (15), we obtain:

gμνμS+eAμνS+eAν2ζgtttS+eAt2+gϕϕϕS+eAϕ2+gtϕtS+eAtϕS+eAϕ+mD2=0 (29)

From Equation (28) to Equation (29), O(ζ2) is neglected, and we set ζ=ζmD, 2ζmD=2ζ, where ζ1 is the correction parameter. It should be noted that in Equations (19), (23), (28) and (29), the free indices μ and ν take values 0, 1, 2, 3. When the upper index μ (or ν) is contracted with the lower index μ (or ν), it results in a scalar term (with no free indices). Therefore, each term on the left-hand side of Equations (19), (23), (28) and (29) is a scalar. Equation (29) is the semiclassical modified form of the dynamical equation for spin-1/2 fermions in the spacetime of a charged, rotating, accelerated black hole, expressed in terms of the particle action, including LIV corrections. The equation without the LIV correction term is the Hamilton-Jacobi equation. Therefore, Equation (29) is an equation that can be used to study the characteristics of stationary black hole quantum tunneling radiation. Substituting Equation (6) into Equation (29) gives:

(12ζ)tS+eAt2ΣH2α2r2+a22a2sin2θr2f(r)f(r)(12ζ)ϕS+eAϕ2ΣH2K2r2f(r)a2sin2θg(θ)sin2θf(r)+(12ζ)tS+eAtϕS+eAϕΣH2αaKr2f(r)g(θ)r2+a2f(r)r2+a2cos2θ2g(θ)Σf(r)H2ΣSr2H2g(θ)Σr2Sθ2+mD2=0 (30)

In the curved spacetime described by Equations (1) and (2), with the basic characteristics of a stationary spacetime and a Killing vector ϕ, the particle action S in Equation (30) can be separated into the following form:

S=ωt+R(r)+Θ(θ)+jϕ (31)

Substituting Equation (31) into Equation (30) and performing variable separation, let the constant introduced during the separation process be denoted as Y0. We can then obtain the equation satisfied by the radial action R(r) for the spin-1/2 fermion in the curved spacetime described by Equation (1) as:

r2f(r)dRdr2= (12ζ)ωeAt2α2r2+a22+a2K2j2+2ωeAtjαaKr2f(r)r2+a2+ f(r)r4mD2+Y0 (32)

As rr+, we have f(r+)=0. Therefore, from Equation (32), we obtain:

dR±drrr+=±αr+2+a2(12ζ)12ωω0r+2f(r)rr (33)

where,

ω0=eqr++aKjαr+2+a2 (34)

By applying the residue theorem and integrating both sides of Equation (33), we obtain the radial action R± as:

R±=±iπαr+2+a2(12ζ)12ωω0fr+r+2 (35)

where,

fr+=2mr+22a2+q2r+3+2r+22A2r+2r+m (36)

According to the theory of black hole quantum tunneling radiation, the quantum tunneling rate for spin-1/2 fermions at the event horizon r+ of this charged, rotating, accelerated black hole is given by [16,17]:

Γexp2ImS±=exp2ImR±=exp4παr+2+a2fr+r+2(12ζ)12ωω0=expωω0TH (37)

where TH is the Hawking temperature of the event horizon of this black hole, given by:

TH=fr+r+24παr+2+a2(12ζ)12f(r)r+24παr+2+a2(1+ζ) (38)

where the higher-order small quantity O(ζ2) is neglected. Obviously, LIV has an impact on TH. TH is independent of θ. According to the zeroth law of black hole thermodynamics, the surface gravity κ of a stationary black hole is a constant, and TH=κ2π, where κ=f(r+)r+2α(r+2+a2) is constant. According to the first law of black hole thermodynamics, there is an inherent connection between the black hole temperature and entropy. The first law of thermodynamics for accelerated black holes with conical deficits has been studied in [7,8,18,19,20]. Reference [21] investigates the modified Bekenstein–Hawking entropy for a charged, non-rotating accelerated black hole. In contrast to these studies, this paper focuses on the modified Bekenstein–Hawking entropy for charged, rotating, accelerated black holes and its associated physical significance. We denote the tensions of the strings along each axis as u± and the thermodynamic length associated with the string tensions as λ±, and use SBH to represent the Bekenstein–Hawking entropy of this black hole. Include the conical deficit as a change and introduce the conjugate chemical potential, use tools from holographic renormalization to properly calculate the various charges of the slowly accelerating black hole spacetime the mathematical expression for the first law of thermodynamics related to this black hole is as follows [8,18]:

dM=THdSBH+ΦdQ+ΩdJ+λ+dμ++λdμ+VdP (39)

In Equation (39), the mass of the black hole is determined as M=mKΞ(Ξ+a22Ξ)12. The accelerating black hole also obeys a Smarr relation M=2(TS+ΩJPV)+ΦQ. The value of α, satisfying the first law and the Smarr relation, is given by α=[(Ξ+a2/2)(1A22Ξ)]121+a2A2 [8,10,18]. Where V is the thermodynamic volume of this black hole. J=maK2, Φ=Φt=qr+(r+2+a2)α. From Equation (39), it follows that

SBH=dMΦdQΩdJλ+dμ+λdμVdPTH=(12ζ)12SBHSBH(1+ζ) (40)

where SBH is the Bekenstein–Hawking entropy of this black hole without LIV corrections. To calculate SBH, we first consider the 2-dimensional line element obtained from Equation (1) as follows:

dSθϕ=r+2+a2cos2θg(θ)dθ2g(θ)sin2θr+2+a22r+2+a2cos2θdϕ2K2 (41)

From Equation (41), the area of the event horizon of this black hole is given by:

As=4πr+2+a2K2 (42)

Therefore, SBH=πKr+2+a2. The entropy SBH in Equation (40) can be expressed as:

SBH=(12ζ)12πr+2+a2Kπ(r+2+a2)K(1ζ) (43)

Here, the higher-order small quantity O(ζ2) is neglected. Where K is as shown in Equation (9). From Equation (43), it can be seen that LIV introduces a correction to the entropy of this black hole.

In addition to the LIV corrections, we can also consider the effects of quantum corrections. For this, let ω0˜=ωω0, and use perturbation theory to express the energy and radial action of the spin-1/2 fermion as follows:

ω˜=ω0˜+i=1iωi˜ (44)
R˜±=R0±+j=1iRj± (45)

Here, R0± represents the radial action in semiclassical theory, as shown in Equation (35). ω0˜ corresponds to (ωω0) in Equations (33), (35) and (37). From Equation (45), we have R1±˜=R0±+1R1±,R2±˜=R0±+1R1±+2R2±,. Using Equations (33), (44) and (45), we can obtain the equation associated with R0± as follows:

dR0±drrr+=±αr+2+a2(12ζ)12r+2f(r)rr+ω0˜ (46)
dR1±rr+=±αr+2+a2(12ζ)12r+2f(r)rr+ω1˜ (47)
dR2±drrr+=±αr+2+a2(12ζ)12r+2f(r)rr+ω2˜ (48)

Similarly, one can write down the equation satisfied by Rl±˜. Obviously, there exists a definite relationship between Ri± and Ri1±. Let Ri±/Ri1±=αi=αi/SBH, from Equations (35) and (45)–(48), we obtain:

R±˜=R0±+i=1iαiR0±=±iπαr+2+a2(12ζ)12ffr+r+21+i=1iαi/SBHωω0 (49)

From this, we can derive the quantum tunneling rate for the spin-1/2 fermion at the event horizon of this black hole as:

Γ˜exp2ImR±˜=expωω0T0˜ (50)

where,

TH˜=fr+r+24παr+2+a2(12ζ)121+i=1iαi/SBH1ωω0 (51)

After the i corrections, the Bekenstein–Hawking entropy can be expressed as:

SBH˜=dMΦdQΩdJλ+dμ+λdμVdPT˜H=SBH+1α1lnSBH+ (52)

where α1=α1SBH,α1=R1±/R0±. In SBH, the LIV correction term is represented by the coefficient ζ, while in SBH˜, the correction terms include both the LIV correction coefficient and the i correction terms. Equation (52) represents the new expression for the modified Bekenstein–Hawking entropy of the charged, rotating, accelerated black hole, as described by Equations (1) and (2).

It should be further clarified that, according to the literature [15], the Dirac equation for spin-1/2 particles in flat spacetime with LIV corrections is given by (γμμ+mi(γφtγii))ψ(x), where μ=xμ=xi,it, and x0=t. When considering ψ(x)=ψ(p)ei(pxp0x0), we obtain p02=p2+m2L2p02p2. When L=0, the well-known Lorentz dispersion relation is recovered. Both general relativity and quantum field theory are based on the Lorentz dispersion relation. The study of LIV has prompted research into modified forms of the fermion dynamics equations in both flat and curved spacetime, as well as related topics. The above research method is not suitable for studying the dynamics equations of bosons. In the next section, we will investigate the modifications to the boson dynamics equations in curved spacetime as described by Equations (1)–(3), along with the related topics.

3. Lorentz-Breaking and the Scalar Field Equation and Black Hole Entropy in the Spacetime of a Charged Rotating Accelerating Black Hole

The previous section discussed the LIV corrections to the dynamical equations of spinor field particles, and used the spin-1/2 fermion as an example to study the modified entropy of a charged, rotating, accelerating black hole. Since the effects of LIV can be studied in curved spacetime, we can more generally express Lorentz violation as Lorentz-breaking. This allows us to introduce Lorentz-breaking correction terms into the particle action in different gravitational fields, and, based on this, apply the variational principle to obtain the modified particle dynamics equations. The following section will use a scalar particle with zero spin as an example to study the modification of the entropy of the charged, rotating, accelerating black hole. LIV indicates that Lorentz symmetry is broken under high-energy conditions. The Einstein-aether theory is a gravitational theory that incorporates Lorentz-breaking. By introducing an aether-like vector field uμ, the action of Einstein’s gravitational field is modified. Then, using the variational principle, the modified form of the scalar field equation is derived. Based on this, the modified dynamical equation for scalar particles (bosons) with spin zero is obtained using the WKB approximation theory, as follows [21].

gμν+σuμuνSxμ+eAμSxν+eAν+m2=0 (53)

This is a semiclassical dynamical equation for spin-0 Bosons. The correction term σuμuνxμ+eAμSx2+eAr corresponds to the Lorentz-breaking correction term in the Einstein-aether gravity theory. For Bosons with other spins, a separate study is required to investigate the modified form of their dynamical equations. In Equation (14), σ is a coupling constant and σ1. The reference [21] uses this equation to study the quantum tunneling radiation characteristics of a class of black holes, but the quantum tunneling radiation features in curved spacetime described by Equations (1)–(3) have not been studied yet. According to Equations (1) and (2), the chosen uμ must satisfy the condition uμuμ=const. The four components of uμ are selected as follows:

ut=ctgtt,utut=ututgtt=ct2ur=crgrr,urur=ururgrr=cr2uθ=cθgθθ,uθuθ=uθuθgθθ=cθ2uϕ=cϕgϕϕ,uϕuϕ=uϕuϕgϕϕ=cϕ2 (54)

From this equation, we can see that uμuμ=2ct2+cr2+cθ2+2cϕ2=C (constant). Therefore, the chosen uμ is correct. By substituting Equations (6) and (54) into Equation (53), the dynamical equation for the spin-zero boson in the spacetime of the charged, rotating, accelerating black hole is given by:

1+σct2ΣH2α2r2+a22a2sin2θr2f(r)f(r)g(θ)r2+a2cos2θ2St+eAt21+σcr2f(r)H2ΣSr2 1+σcθ2g(θ)H2Σr2Sθ21+σcϕ2ΣH2K2r2f(r)a2sin2θg(θ)sin2θr2+a2cos2θ2f(r)g(θ)Sϕ+eAϕ2+ 21+σct2ΣH2aαKr2f(r)g(θ)r2+a2f(r)g(θ)r2+a2cos2θ2St+eAtSϕ+eAϕ+m2+ 2σuturSrSt+eAt+utuθSθSt+eAt+uruϕSrSϕ+eAϕ+ uruθSrSθ+uθuϕSθSϕ+eAϕ=0 (55)

Separate the variables in this equation. Isolate the equation involving (t,r), let Yo˜ is the constant introduced during the separation process. Consider that both 1gtt and 1gϕϕ are related to f(r), and that f(r)rr+=0. Therefore, we examine the case where rr+. Substituting Equation (31) into Equation (55), we obtain

1+σcr2r2f(r)dRdr2rr+= 1+σct2ωeAtrr+2α2r+2+a2+a2K2j2 2ωeAtrr+αaKjr+2+a2+f(r)rr+r+4m2+Yo˜ (56)

From this equation, we obtain:

dR±drrr+=±αr+2+a2ωω0r+2f(r)rr+1+σct21+σcr212 (57)

where ω0 is consistent with Equation (33). Applying the residue theorem to solve Equation (57), we obtain:

R±=±iπαr+2+a2fr+r+21+σct21+σcr212ωω0 (58)

where fr+ is as shown in Equation (36). According to the quantum tunneling radiation theory for black holes, we obtain the quantum tunneling rate for the spin-zero boson at the event horizon of the charged, rotating, accelerating black hole as:

Γexp2ImS±=exp2ImR±=exp4παr+2+a2fr+r+21+σct21+σcr212ωω0=expωω0TH˜ (59)

where,

TH˜=fr+r+24παr+2+a21+σcr21+σct212fr+r+24παr+2+a2[1+12σ(cr2ct2)] (60)

Here, higher-order small quantities O(σ2) are neglected. This is the result of introducing the aether-like vector field uμ according to the Einstein-aether gravitational theory and the correction to the Hawking temperature and quantum tunneling rate of this black hole. Clearly, the components ut and ur of uμ have an influence on the tunneling radiation of this black hole. Once the Lorentz-breaking effects are taken into account, the quantum tunneling radiation of this black hole will be significantly affected by the LIV corrections. Based on the corresponding expression of the first law of thermodynamics for this black hole (Equation (39)), we can obtain the corrected Bekenstein–Hawking entropy of this black hole under the Einstein-aether theory as

SBH˜=1+σct21+σcr212SBH (61)

According Equation (42) SBH=As/4. The corrections to this black hole are related to σ,ct,cr. The above results regarding the tunneling radiation of spin-zero bosons are derived within the semiclassical theory. To further investigate the quantum corrections, the perturbative theory involving needs to be considered for further refinement. Using the same -expansion method as in the previous section, we can derive the corrected result for the entropy of this black hole, which is logarithmically related, i.e.,

SBH*˜=SBH˜+α1lnSBH˜+ (62)

The SBH in Equation (61) is related to the SBH in Equation (52), as shown in Equation (43).

4. Discussion

In previous related papers, only the LIV-corrected black hole entropy for charged accelerating black holes was studied. The difference in this paper is that it investigates the LIV-corrected entropy for charged, rotating, and accelerating black holes. The results presented in this paper are novel. In the above research, we have separately studied the quantum tunneling radiation characteristics of spin-1/2 fermions and spin-zero scalar particles at the event horizon of a charged, rotating, accelerating black hole spacetime. We derived a new expression for the corrected Bekenstein–Hawking entropy of this black hole. These specific expressions include both the results under the semiclassical theory and the corresponding quantum corrected results. The acceleration mechanism of the charged, rotating, accelerating black hole discussed in this paper holds special significance. Since the curved spacetime described by Equations (1) and (2) exhibits a stationary characteristic, the rotation and acceleration of this black hole are inherently stable. The key distinguishing feature of this black hole compared to other types of stationary black holes is that its acceleration is caused by cosmic strings, and this special acceleration mechanism warrants further investigation. It is certain that, based on the work in Reference [3], we have enriched the corrected results for the Hawking temperature and Bekenstein–Hawking entropy of the charged, rotating, accelerating black hole through the discussions in this paper. This contributes to a deeper understanding of the thermodynamic evolution of black holes and related topics. Furthermore, it should be noted that the methods outlined above can be applied to study the quantum tunneling radiation characteristics and the corrections of related physical quantities in different stationary curved spacetimes. We can also modify the action of the spinor field by adding correction terms related to Lorentz-breaking and revise the fermion dynamical equations. On this basis, we can study the quantum tunneling radiation and its corrected expressions for various types of stationary black holes. For nonstationary black holes, when studying LIV corrections, the methods described above cannot be directly applied to the corrections of physical quantities like black hole entropy. We must reconsider the specific form of the transformation matrix. This is the topic we need to further study. In future research, we will conduct meaningful studies on the impact of Lorentz-breaking on the spacetime background and related topics.

Author Contributions

Writing—original draft preparation, C.W.; writing—review and editing, H.-Y.W. and S.-Z.Y. All authors have read and agreed to the published version of the manuscript.

Data Availability Statement

Data is contained within the article.

Conflicts of Interest

The author declares no competing financial interests or personal relationships that may have influenced the work reported in this study.

Funding Statement

This work was supported by National Key R&D Program of China (Grant No. 2023YFB4503305) and the National Natural Science Foundation of China (Grant No. 12373109).

Footnotes

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Data Availability Statement

Data is contained within the article.


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