Cavity-Assisted Generation of Sustainable Macroscopic Entanglement of Ultracold Gases

Joshi, Chaitanya; Larson, Jonas

doi:10.3390/atoms3030348

Cited by 8 publications

(10 citation statements)

References 70 publications

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“…It is known that quantum fluctuation of both the matter wave field [58,59] and cavity light field [60] will induce a depletion of the BEC atoms. And, the scattered atoms can possess interesting properties such as correlation [61,62], entanglement [56] and squeezing [63] in the collision process. This would be a promising future researching direction.…”

Section: Discussionmentioning

confidence: 99%

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Collision of two self-trapped atomic matter wave packets in an optical ring cavity

Qin,

Zhou

2021

Preprint

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The interaction between atomic Bose-Einstein condensate (BEC) and light field in an optical ring cavity gives rise to many interesting phenomena such as supersolid and movable self-trapped matter wave packets. Here we examined the collision of two self-trapped atomic matter wave packets in an optical ring cavity, and abundant colliding phenomena have been found in the system. Depending on the magnitude of colliding velocity, the collision dynamics exhibit very different features compared with the cavity-free case. When the initial colliding velocities of the two wave packets are small, they correlatedly oscillate around their initial equilibrium positions with a small amplitude. Increasing the collision velocity leads to severe scattering of the BEC atoms; after the collision, the two selftrapped wave packets usually break into small pieces. Interestingly, we found that such a medium velocity collision is of great phase sensitivity, which may make the system useful in precision matter wave interferometry. When the colliding velocity is further increased, in the bad cavity limit, the two wave packets collide phenomenally similar to two classical particles -they firstly approach each other, then separate with their shape virtually maintained. However, beyond the bad cavity limit, they experience severe spatial spreading.

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Section: Discussionmentioning

confidence: 99%

“…via the cavity light field even though they are spatially separated, i.e., the cavity mediated interaction is a long range one [55][56][57].…”

Section: Medium Velocity Collisionmentioning

confidence: 99%

Collision of two self-trapped atomic matter wave packets in an optical ring cavity

Qin,

Zhou

2021

Preprint

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“…they consider the Tavis-Cummings model. Entanglement properties for the Dicke model has also been throughly explored [227,[803][804][805][806][807]. In Refs.…”

Section: The Dicke and Tavis-cummings Modelsmentioning

confidence: 99%

The Jaynes-Cummings model and its descendants

Larson,

Mavrogordatos

2022

Preprint

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The Jaynes-Cummings (JC) model has been at the forefront of quantum optics for almost six decades to date, providing one of the simplest yet intricately nonlinear formulations of light-matter interaction in modern physics. Laying most of the emphasis to the omnipresence of the model across a range of disciplines, this monograph brings up the fundamental generality of its formalism, looking at a wide gamut of applications in specific physical systems among several realms, including atomic physics, quantum optics, solid-state physics and quantum information science. When bringing the various pieces together to assemble our narrative, we have primarily targeted researchers in quantum physics and quantum optics. The monograph also comprises an accessible introduction for graduate students engaged with non-equilibrium quantum phase transitions, quantum computing and simulation, and quantum many-body physics. In that framework, we aim to reveal the common ground between physics and applications scattered across literature and different technological advancements. The exposition guides the reader through a vibrant field interlacing quantum optics and condensed-matter physics. All sections are devoted to the strong interconnection between theory and experiment, historically linked to the development of the various modern research directions stemming from JC physics. This is accompanied by a comprehensive list of references to the key publications that have shaped its evolution since the early 1960s. Finally, we have endeavoured to keep the presentation of such a multi-sided material as concise as possible, interspersing continuous text with various illustrations alongside an economical use of mathematical expressions.

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“…This is most easily seen by linearizing the original Dicke model in the Holstein-Primakoff boson representation [15,60]. In the superradiant phase, the resulting quadratic boson Hamiltonian contains additional squeezing terms, e.g.b 2 andâ 2 [62]. Within the effective linear model, the quantum fluctuations cause entanglement in the system, and for the closed Dicke model it has been found that the atom-field entanglement peaks at the critical point [63].…”

Section: Model B -Anisotropic Dicke Model (Normal Phase)mentioning

confidence: 99%

Quantum state engineering in hybrid open quantum systems

Joshi¹,

Larson²,

Spiller³

2016

Phys. Rev. A

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We investigate a possibility to generate non-classical states in light-matter coupled noisy quantum systems, namely the anisotropic Rabi and Dicke models. In these hybrid quantum systems a competing influence of coherent internal dynamics and environment induced dissipation drives the system into non-equilibrium steady states (NESSs). Explicitly, for the anisotropic Rabi model the steady state is given by an incoherent mixture of two states of opposite parities, but as each parity state displays light-matter entanglement we also find that the full state is entangled. Furthermore, as a natural extension of the anisotropic Rabi model to an infinite spin subsystem, we next explored the NESS of the anisotropic Dicke model. The NESS of this linearized Dicke model is also an inseparable state of light and matter. With an aim to enrich the dynamics beyond the sustainable entanglement found for the NESS of these hybrid quantum systems, we also propose to combine an all-optical feedback strategy for quantum state protection and for establishing quantum control in these systems. Our present work further elucidates the relevance of such hybrid open quantum systems for potential applications in quantum architectures.Comment: Significantly revised and close to accepted version (to appear in Phys. Rev. A). Has 2 appendices, 11 figures, and 16 page

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Cavity-Assisted Generation of Sustainable Macroscopic Entanglement of Ultracold Gases

Cited by 8 publications

References 70 publications

Collision of two self-trapped atomic matter wave packets in an optical ring cavity

Collision of two self-trapped atomic matter wave packets in an optical ring cavity

The Jaynes-Cummings model and its descendants

Quantum state engineering in hybrid open quantum systems

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