Quantum engineering of non-Gaussian resources for continuous-variable quantum computing by photon-number-resolving detection

2021 ◽  
Author(s):  
Miller Eaton ◽  
Rajveer Nehra ◽  
Olivier Pfister
Keyword(s):  
Quantum Computing ◽  
Photon Number ◽  
Continuous Variable ◽  
Non Gaussian

scholarly journals ENTANGLEMENT CRITERION FOR COHERENT SUBTRACTION AND COHERENT ADDITION OF BIPARTITE CONTINUOUS VARIABLE STATES

2013 ◽  
Vol 11 (06) ◽  
pp. 1350060
Author(s):  
LI-ZHEN JIANG ◽  
XIAO-YU CHEN ◽  
TIAN-YU YE ◽  
FANG-YU HONG ◽  
LIANG-NENG WU
Keyword(s):  
Thermal Noise ◽  
Photon Number ◽  
Sufficient Conditions ◽  
Continuous Variable ◽  
Entangled State ◽  
Gaussian States ◽  
Non Gaussian ◽  
Entanglement Criterion ◽  
Entanglement Conditions ◽  
Thermal States

We study the entanglement conditions of two quite general classes of two-mode non-Gaussian states. Using computable cross norm and realignment criterion, we obtain the sufficient conditions of entanglement for coherently added or subtracted two-mode squeezed thermal states, and the sufficient condition of entanglement for any photon number entangled state (PNES) evolving in a thermal noise and amplitude damping channel.

scholarly journals Client-friendly continuous-variable blind and verifiable quantum computing

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
Nana Liu ◽  
Tommaso F. Demarie ◽  
Si-Hui Tan ◽  
Leandro Aolita ◽  
Joseph F. Fitzsimons
Keyword(s):  
Quantum Computing ◽  
Continuous Variable

scholarly journals Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution

2016 ◽  
Vol 93 (1) ◽  
Author(s):  
Zhengyu Li ◽  
Yichen Zhang ◽  
Xiangyu Wang ◽  
Bingjie Xu ◽  
Xiang Peng ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Virtual Photon ◽  
Key Distribution ◽  
Continuous Variable ◽  
Photon Subtraction ◽  
Non Gaussian

scholarly journals Continuous-Variable Instantaneous Quantum Computing is Hard to Sample

2017 ◽  
Vol 118 (7) ◽  
Author(s):  
T. Douce ◽  
D. Markham ◽  
E. Kashefi ◽  
E. Diamanti ◽  
T. Coudreau ◽  
...  
Keyword(s):  
Quantum Computing ◽  
Continuous Variable

PHOTON NUMBER DIAGRAM FOR CHARACTERIZING CONTINUOUS VARIABLE ENTANGLEMENT

2004 ◽  
Author(s):  
W. P. BOWEN ◽  
M. T. L. HSU ◽  
T. SYMUL ◽  
A. M. LANCE ◽  
B. C. BUCHLER ◽  
...  
Keyword(s):  
Photon Number ◽  
Continuous Variable

scholarly journals Continuous Variable Entanglement in Non-Zero Orbital Angular Momentum States

Proceedings ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Adriana Pecoraro ◽  
Filippo Cardano ◽  
Lorenzo Marrucci ◽  
Alberto Porzio
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Direct Detection ◽  
Hybrid Approach ◽  
Photon Number ◽  
Local Oscillator ◽  
Continuous Variable ◽  
Degree Of Freedom ◽  
Entangled State ◽  
Continuous Variables

Orbital angular momentum is a discrete degree of freedom that can access an infinite dimensional Hilbert space, thus enhancing the information capacity of a single optical beam. Continuous variables field quadratures allow achieving some quantum tasks in a more advantageous way with respect to the use of photon-number states. Here, we use a hybrid approach realizing bipartite continuous-variable Gaussian entangled state made up of two electromagnetic modes carrying orbital angular momentum. A q-plate is used for endowing a pair of entangled beams with such a degree of freedom. This quantum state is then completely characterized thanks to a novel design of a homodyne detector in which also the local oscillator is an orbital angular momentum-carrying beams so allowing the direct detection of vortex modes quadratures.

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