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New Paper: Physical Review E

Bosons outperform fermions

Bosons outperform fermions: The thermodynamic advantage of symmetry

Nathan M. Myers and Sebastian Deffner

We examine a quantum Otto engine with a harmonic working medium consisting of two particles to explore the use of wave function symmetry as an accessible resource. It is shown that the bosonic system displays enhanced performance when compared to two independent single particle engines, while the fermionic system displays reduced performance. To this end, we explore the trade-off between efficiency and power output and the parameter regimes under which the system functions as engine, refrigerator, or heater. Remarkably, the bosonic system operates under a wider parameter space both when operating as an engine and as a refrigerator.

Posted: January 8, 2020, 2:46 PM