Two Particles In Measurement Based Quantum Heat Engine Without Feedback Control

Recent years,with the development of quantum information technology and the control of single atom and molecular,studies on quantum systems as working substances to convert heat into work become hot and significant.This device is called quantum heat engine.Due to quantum properties of the systems or the reservoirs such as entanglement,degeneracy,coherence,squeezing,and so on,quantum heat engines exhibit many characteristics different from the traditional ones.In this paper,we consider two two and three-level particles as the working substances of measurement based quantum heat engines.A measurement based quantum heat engine is similar to a quantum Otto engine except that a quantum isochoric process is replaced by the quantum measurement.We discuss two identical particles case and two interacting particles case respectively.For two interacting particles case,we find that the work done is always suppressed by the coupling.In the case of local measurement,when we choose the appropriate measurement direction,coupling can promote the improvement of the efficiency of two-level interacting particles.In the case of global measurement,the efficiency of the engine is independent of the coupling strength and only depends on the external magnetic field parameters during the adiabatic process.In addition,for two two and three-level identical particles,we find that the efficiency of the engine is the same as that of a single particle.For two-level and three-level Bosons,they tend to classical-like result in low temperature regime and exhibits strong quantum effects in high temperature regime,which is counterintuitive.For two three-level identical Fermions,the work done by them is the same as that of a three-level particle and has nothing to do with the external control parameters.