Quantum dynamics of a BEC interacting with a single-mode quantized field in the presence of interatom collisions

Ghasemian, E.; Tavassoly, M. K.

doi:10.1016/j.physleta.2016.07.002

Cited by 12 publications

(3 citation statements)

References 17 publications

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“…Ghasemian et al [36] described the collapse-revival phenomenon, after studying the dynamics of BEC atoms interacting with a single-mode laser field. The possibility of generating entangled Schrödinger cat states by using a BEC trapped in a double-well potential has been investigated [37,38].…”

Section: Introductionmentioning

confidence: 99%

Entanglement sudden death and revival in quantum dark-soliton qubits

Shaukat

Castro

Terças³

2018

Phys. Rev. A

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We study the finite time entanglement dynamics between two dark soliton qubits due to quantum fluctuations in a quasi one dimensional Bose-Einstein condensates. Recently, dark solitons are proved to be an appealing platform for qubits due to their appreciably long life time. We explore the entanglement decay for an entangled state of two phonon coherences and the qubits to be in the diagonal basis of so called Dicke states. We observe the collapse and revival of the entanglement, depending critically on the collective damping term but independent of the qubit-qubit interaction for both the initial states. The collective behavior of the dark soliton qubits demonstrate the dependence of entanglement evolution on the interatomic distance.

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Section: Introductionmentioning

confidence: 99%

Entanglement sudden death and revival in quantum dark-soliton qubits

Shaukat

Castro

Terças³

2018

Phys. Rev. A

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“…Therefore, we were motivated to work on BEC systems by considering a new real model in which the dissipative effects are also seen. In our previous work, we investigated the quantum dynamics of an interacting system which consists of an atomic BEC and a single quantized field without dissipation [15].…”

Section: Laser Physicsmentioning

confidence: 99%

“…This definition for atomic population inversion has usually been used in the systems which consist of many particles [15,18]. Using equations ( 9) and ( 10) and after some lengthy calcul ations one can first obtain,…”

Section: Atomic Population Inversionmentioning

confidence: 99%

Quantum dynamics of a BEC interacting with a single-mode quantized field under the influence of a dissipation process: thermal and squeezed vacuum reservoirs

Ghasemian

Tavassoly

2017

Laser Phys.

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In this paper we consider a system consisting of a number of two-level atoms in a Bose-Einstein condensate (BEC) and a single-mode quantized field, which interact with each other in the presence of two different damping sources, i.e. cavity and atomic reservoirs. The reservoirs which we consider here are thermal and squeezed vacuum ones corresponding to field and atom modes. Strictly speaking, by considering both types of reservoirs for each of the atom and field modes, we investigate the quantum dynamics of the interacting bosons in the system. Then, via solving the quantum Langevin equations for such a dissipative BEC system, we obtain analytical expressions for the time dependence of atomic population inversion, mean atom as well as photon number and quadrature squeezing in the field and atom modes. Our investigations demonstrate that for modeling the real physical systems, considering the dissipation effects is essential. Also, numerical calculations which are presented show that the atomic population inversion, the mean number of atoms in the BEC and the photons in the cavity possess damped oscillatory behavior due to the presence of reservoirs. In addition, nonclassical squeezing effects in the field quadrature can be observed especially when squeezed vacuum reservoirs are taken into account. As an outstanding property of this model, we may refer to the fact that one can extract the atom-field coupling constant from the frequency of oscillations in the mentioned quantities such as atomic population inversion.

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Dynamic Properties for BEC in an Optical Cavity with Atom-Photon Nonlinear Interaction

Ghasemian

Tavassoly

2019

Int J Theor Phys

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Quantum dynamics of a BEC interacting with a single-mode quantized field in the presence of interatom collisions

Cited by 12 publications

References 17 publications

Entanglement sudden death and revival in quantum dark-soliton qubits

Entanglement sudden death and revival in quantum dark-soliton qubits

Quantum dynamics of a BEC interacting with a single-mode quantized field under the influence of a dissipation process: thermal and squeezed vacuum reservoirs

Dynamic Properties for BEC in an Optical Cavity with Atom-Photon Nonlinear Interaction

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