Control of the entanglement of two atoms in an optical cavity via white noise

Xu, Jing‐Bo; Li, Shangbin

doi:10.1088/1367-2630/7/1/072

Cited by 35 publications

(37 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result has already been pointed out in the literature [25,27], however, let us insist on the fact that, it is not the amount of decoherence induced on the qubits by their environments what destroys entanglement, but their similarity in nature (or temperatures in the case of thermal baths). Let us then consider the cases with r 2 < r 1 in the rest of this section.…”

Section: Entanglement and Linear Entropymentioning

confidence: 70%

See 1 more Smart Citation

Steady-state entanglement of two coupled qubits

Valle¹

2011

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

The maximum entanglement between two coupled qubits in the steady state under two independent incoherent sources of excitation is reported. Asymmetric configurations where one qubit is excited while the other one dissipates the excitation are optimal for entanglement, reaching values three times larger than with thermal sources. The reason is the purification of the steady state mixture (that includes a Bell state) thanks to the saturation of the pumped qubit. Photon antibunching between the cross emission of the qubits can be used to experimentally evidence the large degrees of entanglement.

show abstract

Section: Entanglement and Linear Entropymentioning

confidence: 70%

“…Xu and Li [25] found that with two equally intense white-noise sources at the same temperature, no entanglement can be formed in the steady state. However, if only one qubit was subjected to a finite temperature source, some entanglement could be achieved.…”

Section: Introductionmentioning

confidence: 99%

Steady-state entanglement of two coupled qubits

Valle¹

2011

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

show abstract

“…In Ref. [22,23], it has been shown that white noise may play a positive role in generating the controllable entanglement in some specific conditions. Malinovsy and Sola [24] have proposed a method of controlling entanglement in a two-qubit system by changing a relative phase of the pulses.…”

Section: Introductionmentioning

confidence: 99%

Coherence-controlled stationary entanglement between two atoms embedded in a bad cavity injected with squeezed vacuum

2014

View full text Add to dashboard Cite

Abstract:We investigate the entanglement between two atoms in an overdamped cavity injected with squeezed vacuum when these two atoms are initially prepared in coherent states. It is shown that the stationary entanglement exhibits a strong dependence on the initial state of the two atoms when the spontaneous emission rate of each atom is equal to the collective spontaneous emission rate, corresponding to the case where the two atoms are close together. It is found that the stationary entanglement of two atoms increases with decreasing effective atomic cooperativity parameter. The squeezed vacuum can enhance the entanglement of two atoms when the atoms are initially in coherent states. Valuably, this provides us with a feasible way to manipulate and control the entanglement, by changing the relative phases and the amplitudes of the polarized atoms and by varying the effective atomic cooperativity parameter of the system, even though the cavity is a bad one. When the spontaneous emission rate of each atom is not equal to the collective spontaneous emission rate, the steady-state entanglement of two atoms always maintains the same value, as the amplitudes of the polarized atoms varies. Moreover, the larger the degree of two-photon correlation, the stronger the steady-state entanglement between the atoms. PACS

show abstract

“…In most treatments the entanglement resulted from the direct interaction between the atoms or has been created by engineering the interaction through the couphng of the atoms to the same cavity mode [3,4,5,6,7]. Entanglement between atoms trapped inside an optical cavity is usually studied for an idealized model of the atoms located precisely at the antinodes of the cavity field.…”

Section: Introductionmentioning

confidence: 99%

Cavity QED Schemes for Controlled Creation of Entanglement Between Distant Atoms

Ficek¹

2007

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. We analyse the commonly used adiabatic techniques in the atom-cavity field interaction to controUably entangle two distant atoms trapped inside a single-mode optical cavity. Two techniques are considered: the first involves a highly detuned cavity from the atomic transition frequencies, and the second involves a near resonant but strongly damped cavity. We show that both, the detuning and the cavity damping are needed to obtain the master equation of the collectively interacting atoms. We analyse the feasibility of the adiabatic techniques in creation of a long living entanglement and find that the cavity damping is more robust for generation of a stationary entanglement between the atoms. The dependence of the stationary entanglement on number of excitations in the system and strengths of the couplings of the atoms to the cavity mode is also discussed.

show abstract

Control of the entanglement of two atoms in an optical cavity via white noise

Cited by 35 publications

References 36 publications

Steady-state entanglement of two coupled qubits

Steady-state entanglement of two coupled qubits

Coherence-controlled stationary entanglement between two atoms embedded in a bad cavity injected with squeezed vacuum

Cavity QED Schemes for Controlled Creation of Entanglement Between Distant Atoms

Contact Info

Product

Resources

About