  A uniformly accelerated atom captures Pancharatnam-Berry phase in its quantum
state and the phase factor depends on the vacuum fluctuation of the background
quantum fields. We observe that the thermal nature of the fields further
affects the induced phase. Interestingly the induced phase captures the
exchange symmetry between the Unruh and real thermal baths. This observation
further supports the claim that the Unruh thermal bath mimics a real thermal
bath. Moreover for certain values of system parameters and at high temperature,
the phase is enhanced compared to zero temperature situation. However the
required temperature to observe the phase experimentally is so high that the
detection of Unruh effect through this is not possible within the current
technology.
