A photonic Carnot engine powered by a spin-star network

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dc.authorid0000-0002-9134-3951en_US
dc.authorid0000-0002-5182-374Xen_US
dc.authorid0000-0001-8870-9134en_US
dc.authorid0000-0003-2753-7396
dc.contributor.authorTürkpençe, Deniz
dc.contributor.authorAltıntaş, Ferdi
dc.contributor.authorPaternostro, Mauro
dc.contributor.authorMüstecaplıoğlu, Özgür Esat
dc.date.accessioned2021-06-23T19:48:57Z
dc.date.available2021-06-23T19:48:57Z
dc.date.issued2017
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractWe propose a spin-star network, where a central spin-(1/2), acting as a quantum fuel, is coupled to N outer spin-(1/2) particles. If the network is in thermal equilibrium with a heat bath, the central spin can have an effective temperature, higher than that of the bath, scaling nonlinearly with N. Such temperature can be tuned with the anisotropy parameter of the coupling. Using a beam of such central spins to pump a micromaser cavity, we determine the dynamics of the cavity field using a coarse-grained master equation. We find that the central-spin beam effectively acts as a hot reservoir to the cavity field and brings it to a thermal steady state whose temperature benefits from the same nonlinear enhancement with N and results in a highly efficient photonic Carnot engine. The validity of our conclusions is tested against the presence of atomic and cavity damping using a microscopic master equation method for typical microwave cavity-QED parameters. The role played by quantum coherence and correlations on the scaling effect is pointed out. An alternative scheme where the spin-(1/2) is coupled to a macroscopic spin-(N/2) particle is also discussed. Copyright (C) EPLA, 2017en_US
dc.identifier.doi10.1209/0295-5075/117/50002
dc.identifier.issn0295-5075
dc.identifier.issn1286-4854
dc.identifier.issue5en_US
dc.identifier.scopus2-s2.0-85019416370en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1209/0295-5075/117/50002
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9282
dc.identifier.volume117en_US
dc.identifier.wosWOS:000401167400002en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAltıntaş, Ferdi
dc.language.isoenen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofEplen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSpin-Star Networken_US
dc.subjectCarnot Engine
dc.subjectQuantum Information
dc.subjectThermodynamics
dc.subjectDecoherence
dc.subjectOpen Systems
dc.titleA photonic Carnot engine powered by a spin-star networken_US
dc.typeArticleen_US

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