20 January 2012 Anomalous evolution of quantum systems in the ultrastrong coupling regime
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Abstract
Analysis of complex quantum systems having many partitions is a very complicated numerical task. As the number of entities increase, the computational burden blows up and at the same time accuracy is lost due to integration in timedomain. Here, we present a systematic and rigorous methodology to deal with the multi-partite quantum systems comprised of many quantum dots with arbitrary transition oscillator strengths as well as dipole-dipole interaction. No limit is imposed on the number of radiation modes in the interacting reservoir. We present an exact solution to this system and also a general self-generating automated code which is capable of solving the system in time-domain with full accuracy and maximal computational efficiency. The code is also able to compute the exact concurrency as the measure of entanglement. Various coupling regimes ranging from the weak to ultrastrong are analyzed and discussed.
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Abbas Arab, Abbas Arab, Sina Khorasani, Sina Khorasani, } "Anomalous evolution of quantum systems in the ultrastrong coupling regime", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82681M (20 January 2012); doi: 10.1117/12.916303; https://doi.org/10.1117/12.916303
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