Generation of an entangled coherent state and reconstruction of a two-mode entangled state via resonant interaction

2005 ◽  
Vol 337 (4-6) ◽  
pp. 305-312 ◽  
Author(s):  
XuBo Zou ◽  
W. Mathis
Keyword(s):  
Coherent State ◽  
Resonant Interaction ◽  
Entangled State ◽  
Entangled Coherent State

IMPROVING THE TELEPORTATION OF TRIPARTITE ENTANGLED COHERENT STATES IN CONTINUOUS VARIABLE

2009 ◽  
Vol 07 (01) ◽  
pp. 313-321 ◽  
Author(s):  
YONG SUN ◽  
BEN-JIN SUN ◽  
MEI-LI SHI ◽  
ZHONG-XIAO MAN ◽  
YUN-JIE XIA
Keyword(s):  
Coherent State ◽  
Continuous Variable ◽  
Phase Shifters ◽  
Entangled State ◽  
Quantum Channels ◽  
Average Fidelity ◽  
Beam Splitters ◽  
Entangled Coherent State ◽  
Tripartite Entangled State ◽  
Photo Detectors

We propose a feasible scheme for the quantum teleportation of tripartite entangled coherent state in terms of linear optical devices such as beam splitters, phase shifters and photo detectors. The scheme is based on the bipartite maximally entangled coherent state and the tripartite entangled coherent state with bipartite maximal entanglement as quantum channels. It shows that for an appreciable mean number of photons equal to 2, the total minimum of average fidelity for an arbitrary tripartite entangled state is 0.981684.

Quantum entanglement of an entangled coherent state: Role of particle losses

2014 ◽  
Vol 23 (3) ◽  
pp. 030310
Author(s):  
Pan Liu ◽  
Xiao-Min Feng ◽  
Guang-Ri Jin
Keyword(s):  
Coherent State ◽  
Quantum Entanglement ◽  
Entangled Coherent State

The influence of excitation number of photon-added coherent state field on the entanglement swapping process

2017 ◽  
Vol 31 (27) ◽  
pp. 1750198 ◽  
Author(s):  
M. Soltani ◽  
M. K. Tavassoly ◽  
R. Pakniat
Keyword(s):  
Coherent State ◽  
Quantum Electrodynamics ◽  
Coherent States ◽  
Success Probability ◽  
Entanglement Swapping ◽  
Cavity Quantum Electrodynamics ◽  
Linear Entropy ◽  
Entangled State ◽  
Maximally Entangled State ◽  
Coherent Field

In this paper, we outline a scheme for the entanglement swapping procedure based on cavity quantum electrodynamics using the Jaynes–Cummings model consisting of the coherent and photon-added coherent states. In particular, utilizing the photon-added coherent states ([Formula: see text][Formula: see text][Formula: see text][Formula: see text], where [Formula: see text] is the Glauber coherent state) in the scheme, enables us to investigate the effect of [Formula: see text], i.e., the number of excitations corresponding to the photon-added coherent field on the entanglement swapping process. In the scheme, two two-level atoms [Formula: see text] and [Formula: see text] are initially entangled together, and distinctly two exploited cavity fields [Formula: see text] and [Formula: see text] are prepared in an entangled state (a combination of coherent and photon-added coherent states). Interacting the atom [Formula: see text] with field [Formula: see text] (via the Jaynes–Cummings model) and then making detection on them, transfers the entanglement from the two atoms [Formula: see text], [Formula: see text] and the two fields [Formula: see text], [Formula: see text] to the atom-field “[Formula: see text]-[Formula: see text]”, i.e., entanglement swapping occurs. In the continuation, we pay our attention to the evaluation of the fidelity of the swapped entangled state relative to a suitable maximally entangled state, success probability of the performed detections and linear entropy as the degree of entanglement of the swapped entangled state. It is demonstrated that, an increase in the number of excitations, [Formula: see text], leads to the increment of fidelity as well as the amount of entanglement. According to our numerical results, the maximum values of fidelity (linear entropy) 0.98 (0.46) is obtained for [Formula: see text], however, the maximum value of success probability does not significantly change by increasing [Formula: see text].

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