Entanglement Sudden Death and Sudden Birth in Semiconductor Microcavities

Abdel‐Khalek, S.; Barzanjeh, Sh.; Eleuch, Hichem

doi:10.1007/s10773-011-0794-y

Cited by 11 publications

(7 citation statements)

References 68 publications

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“…Entanglement sudden death has recently been confirmed experimentally [35]. On the other hand, the entanglement can also be created during the evolution or one can observe revival of the entanglement as well as entanglement sudden birth [36][37][38][39].…”

Section: Introductionmentioning

confidence: 92%

Entanglement and Statistical Properties of a System Consisting of Three-Level Atom Interacting with a Nonlinear Kerr Medium Field

2016

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In this paper, we present a proper quantum system to perform different tasks of quantum information processing with optimal conditions. We study the populations, entanglement, and nonclassical properties of a system consisting of three level atom interacting with a nonlinear Kerr medium field constructed in the framework of generalized Heisenberg algebra. We quantify these quantities in terms of different parameters involved in the whole system considering the case of moving and stationary atom in the real experimental meaning of the coupling constant. The nonlinearity introduced by these kinds of fields play a useful role to create high amount of entanglement during the time evolution. Interestingly, the relationship between the degree of nonlinearity and robust of entanglement is explored in this present model.

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Section: Introductionmentioning

confidence: 92%

Entanglement and Statistical Properties of a System Consisting of Three-Level Atom Interacting with a Nonlinear Kerr Medium Field

2016

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“…The generalization from the constant coupling g to a coupling that evolves with Energies 2016, 9, 1063 4 of 11 time G(t), will provide new physical phenomena that have not been discussed before. A realization of particular interest, with respect to G(t), may be the time-dependent alignment or orientation of the atomic/molecular dipole moment using a laser pulse [48][49][50][51][52][53] and the motion of the atom through the cavity. For an atom oscillating back and forth across a narrow cavity within a square trap, the coupling is modelled approximately to be sinusoidal G(t) = g sin 2 (t) [48].…”

Section: Model Of the Physical Systemmentioning

confidence: 99%

Realistic Quantum Control of Energy Transfer in Photosynthetic Processes

et al. 2016

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Abstract:The occurrence of coherence phenomenon as a result of the interference of the probability amplitude terms is among the principle features of quantum mechanics concepts. Current experiments display the presence of quantum techniques whose coherence is supplied over large interval times. Specifically, photosynthetic mechanisms in light-harvesting complexes furnish oscillatory behaviors owing to quantum coherence. In this manuscript, we study the coherent quantum energy transfer for a single-excitation and nonlocal correlation in a dimer system (donor+acceptor) displayed by two-level systems (TLSs), interacting with a cavity field with a time-dependent coupling effect considering the realistic situation of coupling between each TLS and the cavity field. We analyze and explore the specific conditions which are viable with real experimental realization for the ultimate transfer of quantum energy and nonlocal quantum correlation. We show that the enhancement of the probability for a single-excitation energy transfer greatly benefits from the energy detuning, photon-number transition, classicality of the field, and the time-dependent coupling effect. We also find that the entanglement between the donor and acceptor is very sensitive to the physical parameters and it can be generated during the coherent energy transfer.

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“…In the case of two-qubit [25,26] mixed state defined in eq. (10), an analytical solution was developed by Wootters in terms of concurrence [27] and the concurrence is given by…”

Section: Concurrence and Negativitymentioning

confidence: 99%

Dynamical properties of moving atom–atom entanglement and entanglement between two atoms with optical field

Abdel‐Khalek

Halawani

2015

Pramana - J Phys

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Quantum information technology largely relies on a sophisticated and fragile resource, called quantum entanglement, which exhibits a highly nontrivial manifestation of the coherent superposition of the states of composite quantum systems. In this paper, we study the interaction between the general and even coherent fields with moving and stationary two two-level atoms. In this regard, this paper investigates the von Neumann entropy and the atoms-field tangle as a measure of entanglement between the general and even coherent fields with the two atoms. Also, the entanglement between the two atoms using concurrence and negativity during time evolution is discussed. This paper examines the effects of multiphoton transitions and initial state setting on the entanglement for the system under consideration. Finally, the results demonstrate an important phenomenon such as the sudden death and birth of entanglement when the two atoms are initially in entangled states.Keywords. von Neumann entropy; concurrence; negativity; atoms-field tangle; sudden death and sudden birth of entanglement.

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Entanglement Sudden Death and Sudden Birth in Semiconductor Microcavities

Abstract: We explore the dynamics of the entanglement in a semiconductor cavity QED containing a quantum well. We show the presence of sudden birth and sudden death for some particular sets of the system parameters.

Cited by 11 publications

References 68 publications

Entanglement and Statistical Properties of a System Consisting of Three-Level Atom Interacting with a Nonlinear Kerr Medium Field

Entanglement and Statistical Properties of a System Consisting of Three-Level Atom Interacting with a Nonlinear Kerr Medium Field

Realistic Quantum Control of Energy Transfer in Photosynthetic Processes

Dynamical properties of moving atom–atom entanglement and entanglement between two atoms with optical field

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