Nonequilibrium steady state transport of collective-qubit system in strong coupling regime |
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| Institution: | 1. Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People''s Republic of China;2. Hokkaido University, Sapporo 060-0826, Japan;3. Department of Mechanical Engineering, University of Colorado, Boulder 80309, USA;1. Instituto de Física Fundamental (IFF-CSIC), Serrano 123, 28006 Madrid, Spain;2. Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom;3. Instituto Superior de Tecnologías y Ciencias Aplicadas, Ave. Salvador Allende y Luaces, Quinta de Los Molinos, Plaza, La Habana 10600, Cuba;1. Physics Department, College of Sciences, Shiraz University, Shiraz 71454, Iran;2. Physics Department, Persian Gulf University, Bushehr 75169, Iran;1. College of Science, National University of Defense Technology, 410073 Changsha, China;2. State Key Laboratory of High Performance Computing, National University of Defense Technology, 410073 Changsha, China;1. Department of Botany, Sri Krishnadevaraya University, Anantapur, India;2. Padmashree Institute of Management and Sciences, Bangalore, India |
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| Abstract: | We investigate the steady state photon transport in a nonequilibrium collective-qubit model. By adopting the noninteracting blip approximation, which is applicable in the strong photon–qubit coupling regime, we describe the essential contribution of indirect qubit–qubit interaction to the population distribution, mediated by the photonic baths. The linear relations of both the optimal flux and noise power with the qubits system size are obtained. Moreover, the inversed power-law style for the finite-size scaling of the optimal photon–qubit coupling strength is exhibited, which is proposed to be universal. |
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| Keywords: | Quantum transport Cooperative phenomena in quantum optical systems Quantum fluctuations |
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