2013/08/31 by J. Roßnagel, Johannes Roßnagel, Obinna Abah +4 · 7 citations
Computer Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Carnot cycle #Harmonic #Harmonic oscillator #Heat engine #Limit (mathematics) #Mathematical analysis #Mathematics #Maximum power principle #Monte Carlo method #Physics #Power (physics) #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum Information and Cryptography #Quantum mechanics #Statistical physics #Statistics #Thermal #Thermodynamics #Trap (plumbing) #quant-ph
paper · pdf · doi:10.1103/physrevlett.112.030602
published as Phys. Rev. Lett. 112, 030602 (2014)
arxiv created 2014/01/08 · openalex publication_date 2014/01/22 · arxiv updated 2014/02/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider a quantum Otto cycle for a time-dependent harmonic oscillator coupled to a squeezed thermal reservoir. We show that the efficiency at maximum power increases with the degree of squeezing, surpassing the standard Carnot limit and approaching unity exponentially for large squeezing parameters. We further propose an experimental scheme to implement such a model system by using a single trapped ion in a linear Paul trap with special geometry. Our analytical investigations are supported by Monte Carlo simulations that demonstrate the feasibility of our proposal. For realistic trap parameters, an increase of the efficiency at maximum power of up to a factor of 4 is reached, largely exceeding the Carnot bound.