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quant-ph2017★ 25 cited
Lee-Yang zeros and two-time spin correlation function
Kh. P. Gnatenko, A. Kargol, V. M. Tkachuk
The two-time correlation function for probe spin interacting with spin system (bath) is studied. We show that zeros of this function correspond to zeros of partition function of sp…
quant-ph2017★ 5 cited
Time correlation functions and Fisher zeros for q-deformed Bose gas
Kh. P. Gnatenko, A. Kargol, V. M. Tkachuk
The time-dependent correlation functions of q-deformed Bose gas are studied. We find relation of zeros of the correlation functions with the Fisher zeros of partition function of t…