Imaging the interface of a qubit and its quantum-many-body environment

Rammohan, S.; Tiwari, S.; Mishra, Anurag; Pendse, Abhijit; Chauhan, A. K.; Nath, Rejish; Eisfeld, Alexander; Wüster, Sebastian

doi:10.1103/physreva.104.l060202

Cited by 4 publications

(1 citation statement)

References 69 publications

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“…For example, the Dicke quantum phase transition (QPT) in the cavity-BEC system [56][57][58][59][60][61][62][63][64][65][66][67] has been experimentally demonstrated and extensively studied theoretically. Furthermore, an impurity-doped BEC [68][69][70][71][72][73][74][75][76] builds a micro-macro hybrid quantum systems where the microscopic impurities meet such a macroscopic matter as BEC. Such a hybrid systems can combine complementary functionalities of micro-macro devices to obtain multitasking capabilities which is crucial for implementing quantum information processing [77][78][79].…”

Section: Introductionmentioning

confidence: 99%

Einstein-Podolsky-Rosen steering of quantum phases in a cavity Bose-Einstein condensate with a single impurity

Jia¹,

Li²,

Jiao³

et al. 2022

Preprint

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We study Einstein-Podolsky-Rosen (EPR) steering properties of quantum phases in the generalized Dicke model (GDM) generated by a cavity Bose-Einstein condensate (BEC) doped with a single impurity. It is shown that the normal and superradiant phases of the GDM exhibit much rich EPR steerability. In the normal phase, there exist one-way EPR steering from the cavity field (condensed atoms) to condensed atoms (the cavity field ). In the superradiant phase, there is either one-way or two-way EPR steering for the cavity field and condensed atoms. It is found that the single impurity can act as a single-atom switch of the EPR steering to control the steering direction of one-way EPR steering and the transition between one-way and two-way EPR steering through switching on or off the impurity-BEC coupling. It is proved that the EPR steering parameters can witness the quantum phase transition (QPT) occurrence through the sudden change of the EPR steering parameters at the critical point of the QPT. Our results open a new way to manipulate macroscopic EPR steering and witness the QPT between the normal phase and the superradiant phase in the GDM through a microscopic impurity atom.

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Section: Introductionmentioning

confidence: 99%

Einstein-Podolsky-Rosen steering of quantum phases in a cavity Bose-Einstein condensate with a single impurity

Jia¹,

Li²,

Jiao³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Micro–micro and micro–macro entanglement witnessing via the geometric phase in an impurity-doped Bose–Einstein condensate

Jiao

Jia

et al. 2022

Quantum Inf Process

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Simulation of absorption spectra of molecular aggregates: A hierarchy of stochastic pure state approach

Chen

Bennett

Eisfeld

2022

The Journal of Chemical Physics

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The simulation of spectroscopic observables for molecular aggregates with strong and structured coupling of electronic excitation to vibrational degrees of freedom is an important but challenging task. The Hierarchy of Pure States (HOPS) provides a formally exact solution based on local, stochastic trajectories. Exploiting the localization of HOPS for the simulation of absorption spectra in large aggregates requires a formulation in terms of normalized trajectories. Here we provide a normalized dyadic equation where the ket- and bra-states are propagated in different electronic Hilbert spaces. This work opens the door to applying adaptive HOPS methods for the simulation of absorption spectra.

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Imaging the interface of a qubit and its quantum-many-body environment

Cited by 4 publications

References 69 publications

Einstein-Podolsky-Rosen steering of quantum phases in a cavity Bose-Einstein condensate with a single impurity

Einstein-Podolsky-Rosen steering of quantum phases in a cavity Bose-Einstein condensate with a single impurity

Micro–micro and micro–macro entanglement witnessing via the geometric phase in an impurity-doped Bose–Einstein condensate

Simulation of absorption spectra of molecular aggregates: A hierarchy of stochastic pure state approach

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