Room 117

Thermal entangled quantum heat engine

Sahil

IMSc

Based on a two-qubit Heisenberg XY model, we construct a
four-level entangled quantum heat engine (QHE). It is an interesting
quantum Otto cycle where the exchange constant is fixed and only the
magnetic field is varied during the adiabatic steps. The expressions
for several thermodynamic quantities such as the heat transferred, the
work and the efficiency are derived. Moreover,the influence of the
entanglement on the thermodynamic quantities is investigated
numerically. Several interesting features of the variation of the heat
transferred, the work and the efficiency with the concurrences of the
thermal entanglement of different thermal equilibrium states are
obtained. Finally, we discussed the maximum efficiency of the QHE.

Link to the paper:
reader.elsevier.com/reader/sd/pii/S0378437112007194?token=38F3251CA874BBBB2C2626133AC6602083E93085FF9B1C6AFA2A9AFA7D562F4A0E45179E7EC051772C6C861303EA910A