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Normalized autocorrelation function of the temperature in ST simulations with nearest-neighbor temperature exchanges (solid lines), N=3, 5, 7, and 9 evenly spaced temperatures and upper temperatures of TN=2.1, 2.2, 2.3, and 2.4. Dashed lines show the theoretical predictions exp(−t∕τT) with τT from Eq. 23. Also shown is the curve for N=9 with global temperatures changes (i→1,2,…,i−1,i+1,…,N) permitting distant jumps in the temperature.
