Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Dec 9;10:5625. doi: 10.1038/s41467-019-13332-w

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 2 — Coherent spin control in the SiV^– centre. a Spin control of the silicon-vacancy centre at millikelvin temperatures. Single-shot spin readout with magnetic field B = 2.7 kG: a 20-ms-long laser pulse pumping the transition A1 (see Fig. 1c) is used to read out the state after a 250-ms-long initialization pump of the A1 (red) or B2 transition (blue). b Ramsey interference measurement of T₂^⋆ for two samples: ¹³C purified sample (blue, 0.001% ¹³C) and unprocessed natural sample (red, 1.1% ¹³C). The microwave field is detuned by ~550 kHz from the Zeeman splitting between |1〉 and |2〉. The duration of the initialization and readout period are 15 and 2 ms for the 0.001% ¹³C sample, and 2 and 1.5 ms for the 1.1% ¹³C sample. c Carr–Purcell–Meiboom–Gill (CPMG) pulse sequence with N = 1, 2, 4, 8, 16 and 32 pulses in a sample with low ¹³C concentrations and with an aligned magnetic field B ≈ 1.6 kG at 100 mK. Durations of the initialization and readout laser pulses are 100 and 15 ms, respectively. Dashed lines are fits to exp[–(T/T₂)⁴]. d Suppression of spin dephasing via strain engineering. The simulated bending of a diamond cantilever containing a SiV^– centre is at an applied voltage of 200 V between top and bottom electrodes. The component of the strain tensor in the direction of the long axis of the cantilever is indicated by the colour scale. Scale bar corresponds to 2 μm. The linewidth of coherent population trapping (CPT) dips as a function of ground-state orbital splitting Δ_GS is shown, indicating an increase in spin coherence for higher levels of strain. e Demonstration of coherent manipulation trapping with GeV^– centres. The top panels represent coherent excitation from the lower (1) and higher (2) energy ground state manifold to the excited state (3). A dip with full-width at half-maximum of (8.6 ± 0.5) MHz is visible, which corresponds to a coherence lifetime of (19 ± 1) ns. Panels a, b and c are reprinted with permission from ref. ³⁶. Copyright 2017 by the American Physical Society; panel d is reprinted from ref. ⁷⁶, Copyright 2018 by Springer Nature; panel e is reprinted with permission from ref. ³⁷ Copyright 2017 by the American Physical Society.