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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8342
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dc.contributor.authorVishnu, T.R.-
dc.contributor.authorRoy, Dibyendu-
dc.date.accessioned2024-10-17T07:50:11Z-
dc.date.available2024-10-17T07:50:11Z-
dc.date.issued2024-10-09-
dc.identifier.citationJournal of Statistical Physics, 2024, Vol. 191, p123en_US
dc.identifier.urihttp://hdl.handle.net/2289/8342-
dc.descriptionOpen Accessen_US
dc.description.abstractWe investigate heat transport through a one-dimensional open coupled scalar field theory, depicted as a network of harmonic oscillators connected to thermal baths at the boundaries. The non-Hermitian dynamical matrix of the network undergoes a stability-to-instability tran- sition at the exceptional points as the coupling strength between the scalar fields increases. The open network in the unstable regime, marked by the emergence of inverted oscillator modes, does not acquire a steady state, and the heat conduction is then unbounded for gen- eral bath couplings. In this work, we engineer a unique bath coupling where a single bath is connected to two fields at each edge with the same strength. This configuration leads to a finite steady-state heat conduction in the network, even in the unstable regime. We also study general bath couplings, e.g., connecting two fields to two separate baths at each boundary, which shows an exciting signature of approaching the unstable regime for massive fields. We derive analytical expressions for high-temperature classical heat current through the network for different bath couplings at the edges and compare them. Furthermore, we determine the temperature dependence of low-temperature quantum heat current in different cases.en_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.urihttps://arxiv.org/abs/2402.04986en_US
dc.relation.urihttps://doi.org/10.1007/s10955-024-03341-5en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2024arXiv240204986V/abstracten_US
dc.relation.urihttps://inspirehep.net/literature/2756346en_US
dc.rights2024 The Author(s)en_US
dc.subjectHeat transporten_US
dc.subjectCoupled scalar field theoryen_US
dc.subjectStability-to-instability transitionen_US
dc.subjectQuantum Langevin equationsen_US
dc.titleHeat Transport Through an Open Coupled Scalar Field Theory Hosting Stability-to-Instability Transitionen_US
dc.typeArticleen_US
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