Vacuum Condensate, Geometric Phase, Unruh Effect, and Temperature Measurement

Figure 2

Plots of as function of the temperatures of cold sources , for the splitting between the hyperfine energy levels and values: (blue) dashed line: , line, splitting for transition  MHz,  MHz [54]) and  K; (red) dot-dashed line: , line, splitting for transition ( MHz,  MHz [53]), and  K; (gray) solid line: , line, splitting for transition ( MHz,  MHz [54]) and  K; (black) dotted line: , line, splitting for transition ( GHz,  MHz [54]) and  K. The time considered is  s.