Wigner function for the generalized excited pair coherent state

2008 ◽  
Vol 17 (5) ◽  
pp. 1791-1797 ◽  
Author(s):  
Meng Xiang-Guo ◽  
Wang Ji-Suo ◽  
Liang Bao-Long ◽  
Li Hong-Qi
Keyword(s):  
Coherent State ◽  
Wigner Function ◽  
Pair Coherent State

scholarly journals Detecting Nonclassicality and Non-gaussianity by the Wigner Function and Quantum Teleportation in Photon-added-and-subtracted Two Modes Pair Coherent State

2021 ◽  
Author(s):  
Minh Duc Truong ◽  
Chuong Sy Ho ◽  
Dat Quang Tran
Keyword(s):  
Coherent State ◽  
Wigner Function ◽  
Phase Difference ◽  
Quantum Teleportation ◽  
Entangled State ◽  
Pair Coherent State ◽  
Non Gaussian ◽  
Degree Of Entanglement

Abstract We introduce a new state called photon-added-and-subtracted two modes pair coherent state (PAASTMPCS) by simultaneously adding and subtracting photons to the different modes of a pair coherent state. Its nonclassical and non-Gaussian properties are strengthened via the negative values of its Wigner function as the numbers of adding and subtracting photons are increased. It indicates that the PAASTMPCS is an entangled state. When increasing the numbers of photon-added and photon-subtracted to a pair coherent state, the degree of entanglement in the PAASTMPCS is enhanced compared with the original pair coherent state. By using a PAASTMPCS as a non-Gaussian entangled resource, the quantum teleportation processes are studied in detail. It is shown that the number sum and phase difference measurements protocol is more appropriate than the orthogonal quadrature components measurements protocol in the quantum teleportation process of a coherent state.

Wigner function and tomogram of the pair coherent state

2007 ◽  
Vol 363 (1-2) ◽  
pp. 12-18 ◽  
Author(s):  
Xiang-Guo Meng ◽  
Ji-Suo Wang ◽  
Hong-Yi Fan
Keyword(s):  
Coherent State ◽  
Wigner Function ◽  
Pair Coherent State

Entanglement and nonlocality for a mixture of a pair-coherent state

2003 ◽  
Vol 3 (2) ◽  
pp. 106-115
Author(s):  
S. Mancini ◽  
P. Tombesi
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Single Photon ◽  
Continuous Variables ◽  
Bell’S Inequalities ◽  
Nonclassical Properties ◽  
Pair Coherent State ◽  
Photon Loss ◽  
Phase Randomization ◽  
Degree Of Entanglement

We consider a bipartite continuous variables quantum mixture coming from phase randomization of a pair-coherent state. We study the nonclassical properties of such a mixture. In particular, we quantify its degree of entanglement, then we show possible violations of Bell's inequalities. We also consider the use of this mixture in quantum teleportation. Finally, we compare this mixture with that obtained from a pair-coherent state by single photon loss.

Statistical Fluctuation Analysis of Quantum Key Distribution Protocols Based on Heralded Pair Coherent State

2020 ◽  
Vol 40 (7) ◽  
pp. 0727002
Author(s):  
何业锋 He Yefeng ◽  
赵艳坤 Zhao Yankun ◽  
郭佳瑞 Guo Jiarui ◽  
李春雨 Li Chunyu
Keyword(s):  
Coherent State ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Fluctuation Analysis ◽  
Statistical Fluctuation ◽  
Pair Coherent State
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