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Events for day: Thursday 15 February 2018    
           13:00 - 14:00     Quantum information biweekly journal club
Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound (Continuation)

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NANO SCIENCES

Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound

A long-standing open problem whether a heat engine with finite power achieves the Carnot efficiency is investgated. We rigorously prove a general trade-off inequality on thermodynamic efficiency and time interval of a cyclic process with quantum heat engines. In a first step, employing the Lieb-Robinson bound we establish an inequality on the change in a local observable caused by an operation far from support of the local observable. This inequality provides a rigorous characterization of the following intuitive picture that most o ...