General-dyne unravelling of a thermal master equation |
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Authors: | M. G. Genoni S. Mancini A. Serafini |
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Affiliation: | 1. Department of Physics Astronomy, University College London, Gower Street, London, WC1E 6BT, UK 2. School of Science and Technology, University of Camerino, I-62032, Camerino, Italy 4. Sezione di Perugia, INFN, I-06123, Perugia, Italy 3. Scuola Normale Superiore, I-56126, Pisa, Italy
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Abstract: | We analyze the unravelling of the quantum optical master equation at finite temperature due to direct, continuous, general-dyne detection of the environment. We first express the general-dyne Positive Operator Valued Measure (POVM) in terms of the eigenstates of a non-Hermitian operator associated to the general-dyne measurement. Then we derive the stochastic master equation obtained by considering the interaction between the system and a reservoir at thermal equilibrium, which is measured according to the POVM previously determined. Finally, we present a feasible measurement scheme, which reproduces general-dyne detection for any value of the parameter characterizing the stochastic master equation. |
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