Abstract
We consider two two-level particles (qubits) as the working substances of measurement-based quantum heat engines. A measurement-based quantum heat engine is similar to a quantum Otto heat engine other than a quantum isochoric process is replaced by the quantum measurement. We discuss two identical Bosons case and two interacting particles case, respectively. For two Bosons, we find the efficiency is same to a single-particle case but the work output is enhanced. It tends to classical-like result in low temperature regime and exhibits strong quantum effects in high temperature regime, which is counterintuitive. For two interacting qubits, we show the work done is always suppressed by the coupling. The efficiency can be improved under certain conditions in local measurement case and is same to a single-particle case when Bell measurement is done.
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