scholarly journals Rome teleportation experiment analysed in the Wigner representation: the role of the zeropoint fluctuations in complete one-photon polarization-momentum Bell-state analysis

2018 ◽  
Vol 65 (17) ◽  
pp. 1960-1974 ◽  
Author(s):  
A. Casado ◽  
S. Guerra ◽  
J. Plácido
Keyword(s):  
Bell State ◽  
Photon Polarization ◽  
Wigner Representation ◽  
State Analysis

Economical multi-photon polarization entanglement purification with Bell state

2021 ◽  
Vol 20 (8) ◽  
Author(s):  
Lan Zhou ◽  
Ze-Kai Liu ◽  
Zi-Xuan Xu ◽  
Yi-Lun Cui ◽  
Hai-Jiang Ran ◽  
...  
Keyword(s):  
Bell State ◽  
Photon Polarization ◽  
Entanglement Purification

Asymmetrical Bell state analysis for photon-atoms hybrid system

2019 ◽  
Vol 62 (12) ◽  
Author(s):  
Yi-Lin Liu ◽  
Miao-Wei Wang ◽  
Chun-Yu Bai ◽  
Tie-Jun Wang
Keyword(s):  
Hybrid System ◽  
Bell State ◽  
State Analysis

scholarly journals Complete hyperentangled-Bell-state analysis for photon systems assisted by quantum-dot spins in optical microcavities

2012 ◽  
Vol 20 (22) ◽  
pp. 24664 ◽  
Author(s):  
Bao-Cang Ren ◽  
Hai-Rui Wei ◽  
Ming Hua ◽  
Tao Li ◽  
Fu-Guo Deng
Keyword(s):  
Quantum Dot ◽  
Bell State ◽  
Optical Microcavities ◽  
State Analysis

Complete and Nondestructive Atomic Bell-State Analysis Assisted by Inverse Engineering

2018 ◽  
Vol 530 (7) ◽  
pp. 1800133 ◽  
Author(s):  
Ri-Hua Zheng ◽  
Yi-Hao Kang ◽  
Zhi-Cheng Shi ◽  
Yan Xia
Keyword(s):  
Bell State ◽  
State Analysis

Complete hyperentangled Bell state analysis assisted by hyperentanglement

2020 ◽  
Vol 17 (7) ◽  
pp. 075203
Author(s):  
Zhi Zeng ◽  
Ka-Di Zhu
Keyword(s):  
Bell State ◽  
State Analysis

scholarly journals From Stochastic Optics to theWigner Formalism: The Role of the Vacuum Field in Optical Quantum Communication Experiments

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 76 ◽  
Author(s):  
Alberto Casado ◽  
Santiago Guerra ◽  
José Plácido
Keyword(s):  
Quantum Cryptography ◽  
Physical Meaning ◽  
Quantum Communication ◽  
Bell State ◽  
Vacuum Field ◽  
Heisenberg Picture ◽  
Parametric Down Conversion ◽  
The Relationship ◽  
Down Conversion

TheWigner formalism in the Heisenberg picture constitutes a bridge that connects QuantumOptics to Stochastic Optics. The vacuum field appears explicitly in the formalism, and the wavelikeaspects of light are emphasised. In addition, the zeropoint intensity as a threshold for detection is acommon denominator in both theories. In this paper, after summarising the basic rules of the Wignerapproach and its application to parametric down-conversion, some new results are presented thatdelve into the physical meaning of the zeropoint field in optical quantum communication. Specifically,the relationship between Bell-state distinguishability and the number of sets of zeropoint modesthat take part in the experiment is analysed in terms of the coupling between the phases of thedifferent fields involved and the subtraction of the zeropoint intensity at the detectors. Additionally,the connection between the compatibility theorem in quantum cryptography and zeropoint fieldis stressed.

scholarly journals Partial Bell-State Analysis with Parametric down Conversion in the Wigner Function Formalism

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
A. Casado ◽  
S. Guerra ◽  
J. Plácido
Keyword(s):  
Wigner Function ◽  
Beam Splitter ◽  
Bell State ◽  
Function Formalism ◽  
State Measurement ◽  
Parametric Down Conversion ◽  
Correlation Properties ◽  
Light Beams ◽  
Down Conversion ◽  
State Analysis

We apply the Wigner function formalism to partial Bell-state analysis using polarization entanglement produced in parametric down conversion. Two-photon statistics at a beam-splitter are reproduced by a wave-like description with zeropoint fluctuations of the electromagnetic field. In particular, the fermionic behaviour of two photons in the singlet state is explained from the invariance on the correlation properties of two light beams going through a balanced beam-splitter. Moreover, we show that a Bell-state measurement introduces some fundamental noise at the idle channels of the analyzers. As a consequence, the consideration of more independent sets of vacuum modes entering the crystal appears as a need for a complete Bell-state analysis.

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