Spin Squeezing of the Two Two-Level Atoms Interacting with a Binomial Field

Ma, Jun-Mao; Zhang, Jiao; Li, Ning

doi:10.1007/s10773-007-9560-6

Cited by 11 publications

(5 citation statements)

References 18 publications

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“…Recently, a new class of SPTs has been found in a 'quantum Rabi triangle' with broken Z 2 and chiral symmetry [26,27]. The TC model exhibits a wide variety of interesting phenomena apart from SPT, such as spin squeezing [28,29] and multi-photon transitions [30], manybody phenomena [9,18,31,32], quantum discord [33,34], quantum fluctuations [35,36], and entanglement [37][38][39][40][41]. Although extensive theoretical studies on SPT in Dicke and TC models have been carried out over the years, the experimental realization of SPT in a prototype or standard DM remains quite challenging, because achieving a super-strong critical coupling strength required for SPT is extremely difficult.…”

Section: Introductionmentioning

confidence: 99%

Dissipative phase transition in an open Tavis–Cummings model with a two-photon drive

Adhikary

Müstecaplıoğlu

Deb

2023

J. Phys. B: At. Mol. Opt. Phys.

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We investigate the steady-state quantum phases and associated collective phenomena of an open Tavis-Cummings (TC) model driven by a two-photon source. The standard (non-dissipative) TC model describes quantum phases of an ensemble of $N_q$ two-level quantum emitters interacting with a single-mode electromagnetic field. The interplay among coherent driving, dissipation, and dipole interactions of the open TC model results in emergent collective phenomena, leading to a dissipative or nonequilibrium phase transition from normal to superradiant phase. We solve the Liouvillian equation analytically using the semi-classical mean-field approximation. We carry out the stability analysis of the steady-state phases and determine the phase boundary. The use of Holstein-Primakoff transformation in the thermodynamic limit $N_q\rightarrow\infty$ reduces the system to an effective coupled-oscillator model, the solution of which yields collective modes.

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Section: Introductionmentioning

confidence: 99%

Dissipative phase transition in an open Tavis–Cummings model with a two-photon drive

Adhikary

Müstecaplıoğlu

Deb

2023

J. Phys. B: At. Mol. Opt. Phys.

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“…On the one hand, atomic squeezing has potential applications in the field of quantum optics [7,8] and quantum information, [9] and can effectively inhibit QN. [10] Because an atomic optimal squeezing state corresponds to a quantum state with minimum QN, [11] its preparation and control are very important tasks in the relevant research field. In recent years, entropy squeezing of a two-level atom has become a research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Preparation of optimal entropy squeezing state of atomic qubit inside the cavity via two-photon process and manipulation of atomic qubit outside the cavity

Bing-Ju¹,

Zhao-Hui²,

Jia³

et al. 2014

Chinese Phys. B

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Considering two atomic qubits initially in Bell states, we send one qubit into a vacuum cavity with two-photon resonance and leave the other one outside. Using quantum information entropy squeezing theory, the time evolutions of the entropy squeezing factor of the atomic qubit inside the cavity are discussed for two cases, i.e., before and after rotation and measurement of the atomic qubit outside the cavity. It is shown that the atomic qubit inside the cavity has no entropy squeezing phenomenon and is always in a decoherent state before the operating atomic qubit outside the cavity. However, the periodical entropy squeezing phenomenon emerges and the optimal entropy squeezing state can be prepared for the atomic qubit inside the cavity by adjusting the rotation angle, choosing the interaction time between the atomic qubit and the cavity, controlling the probability amplitudes of subsystem states. Its physical essence is cutting the entanglement between the atomic qubit and its environment, causing the atomic qubit inside the cavity to change from the initial decoherent state into maximum coherent superposition state, which is a possible way of recovering the coherence of a single atomic qubit in the noise environment.

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“…Over the past decades, much attention has been paid on atomic squeezing. [1,2] On one hand, atomic squeezing has potential applications to the field of quantum optics, [3,4] on the other hand, it has been shown that squeezed atoms can radiate a squeezed light field, [5] which can effectively inhibit quantum noise (QN), cause distortion of the encoded quantum state and lead to decoherence in quantum information processing (QIP) and quantum computer (QC), then become a main obstacle of experimental realization of the QIP and QC. [6] Because an atomic optimal squeezing state corresponds to a quantum state with minimum noise, its preparation and control are very important tasks in this research field.…”

Section: Introductionmentioning

confidence: 99%

Preparation and control of atomic optimal entropy squeezing states for a moving two-level atom under control of the two-mode squeezing vacuum fields

Zhou¹,

Yi-Man²,

Ming-Zhuo³

et al. 2010

Chinese Phys. B

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From the viewpoint of quantum information, this paper studies preparation and control of atomic optimal entropy squeezing states (AOESS) for a moving two-level atom under control of the two-mode squeezing vacuum fields. Necessary conditions of preparation of the AOESS are analysed, and numerical verification of the AOESS is finished. It shows that the AOESS can be prepared by controlling the time of the atom interaction with the field, cutting the entanglement between the atom and field, and adjusting squeezing factor of the field. An atomic optimal entropy squeezing sudden generation in different components can alternately be realized by controlling the field-mode structure parameter.

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Spin Squeezing of the Two Two-Level Atoms Interacting with a Binomial Field

Abstract: Spin squeezing of the two two-level atoms interacting with a binomial field has been investigated with the different initial conditions. It is shown that spin squeezing can be exhibited in the certain range of p and the degree of squeezing is dependent on p.

Cited by 11 publications

References 18 publications

Dissipative phase transition in an open Tavis–Cummings model with a two-photon drive

Dissipative phase transition in an open Tavis–Cummings model with a two-photon drive

Preparation of optimal entropy squeezing state of atomic qubit inside the cavity via two-photon process and manipulation of atomic qubit outside the cavity

Preparation and control of atomic optimal entropy squeezing states for a moving two-level atom under control of the two-mode squeezing vacuum fields

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