Hauptseite > Publikationsdatenbank > Non-Markovian dynamics of open quantum systems via auxiliary particles with exact operator constraint > print

001     1023797
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024 7 _ |a 10.1103/PhysRevResearch.6.013220
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082 _ _ |a 530
100 1 _ |a Bode, Tim
|0 P:(DE-Juel1)195623
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245 _ _ |a Non-Markovian dynamics of open quantum systems via auxiliary particles with exact operator constraint
260 _ _ |a College Park, MD
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520 _ _ |a We introduce an auxiliary-particle field theory to treat the non-Markovian dynamics of driven-dissipative quantum systems of the Jaynes-Cummings type. It assigns an individual quantum field to each reservoir state and provides an analytic, faithful representation of the coupled system-bath dynamics. We apply the method to a driven-dissipative photon Bose-Einstein condensate (BEC) coupled to a reservoir of dye molecules with electronic and vibronic excitations. The complete phase diagram of this system exhibits a hidden, non-Hermitian phase transition separating temporally oscillating from biexponentially decaying photon density correlations within the BEC. On one hand, this provides a qualitative distinction of the thermal photon BEC from a laser. On the other hand, it shows that one may continuously tune from the BEC to the lasing phase by circumventing a critical point. This auxiliary-particle method is generally applicable to the dynamics of open, non-Markovian quantum systems.
536 _ _ |a 5223 - Quantum-Computer Control Systems and Cryoelectronics (POF4-522)
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700 1 _ |a Kajan, Michael
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700 1 _ |a Meirinhos, Francisco
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700 1 _ |a Kroha, Johann
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773 _ _ |a 10.1103/PhysRevResearch.6.013220
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|y 2024
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856 4 _ |y OpenAccess
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