Feedforward-assisted coherent-state comparison amplifier

被引：1
作者：
Bathaee, M. [1 ]
Marjan, N. [1 ]
Bahrampour, A. R. [1 ]
机构：
[1] Sharif Univ Technol, Dept Phys, POB 11365-9161, Tehran, Iran
来源：
PHYSICAL REVIEW A | 2019年 / 100卷 / 04期
关键词：
QUANTUM; AMPLIFICATION;
D O I：
10.1103/PhysRevA.100.043809
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Quantum optical coherent-state comparison amplifiers are nondeterministic devices which can amplify rather noiselessly a weak coherent state with an unknown phase from a finite discrete set. The high fidelity and high success probability of this amplifier are accomplished by a comparison stage and some photon subtraction stages. Due to the heralding nature of these amplifiers, they work part of the time. Here, we propose a feedforward protocol to increase the heralded times by correcting the incorrect guess. Hence, we enhance the fidelity and success probability more. Finally, the schematic experimental configuration of the feedforward-assisted coherent-state comparison amplifier is proposed.
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页数：8
相关论文
共 20 条
[1]  
Adnane H., ARXIV190107480
[2]   Unconditional quantum cloning of coherent states with linear optics [J].
Andersen, UL ;
Josse, V ;
Leuchs, G .
PHYSICAL REVIEW LETTERS, 2005, 94 (24)
[3]   Experimentally realizable quantum comparison of coherent states and its applications [J].
Andersson, Erika ;
Curty, Marcos ;
Jex, Igor .
PHYSICAL REVIEW A, 2006, 74 (02)
[4]   Performance Improvement of Plug-and-Play Dual-Phase-Modulated Quantum Key Distribution by Using a Noiseless Amplifier [J].
Bai, Dongyun ;
Huang, Peng ;
Ma, Hongxin ;
Wang, Tao ;
Zeng, Guihua .
ENTROPY, 2017, 19 (10)
[5]   Quantum limits on phase-preserving linear amplifiers [J].
Caves, Carlton M. ;
Combes, Joshua ;
Jiang, Zhang ;
Pandey, Shashank .
PHYSICAL REVIEW A, 2012, 86 (06)
[6]   QUANTUM LIMITS ON NOISE IN LINEAR-AMPLIFIERS [J].
CAVES, CM .
PHYSICAL REVIEW D, 1982, 26 (08) :1817-1839
[7]  
Chrzanowski HM, 2014, NAT PHOTONICS, V8, P333, DOI [10.1038/NPHOTON.2014.49, 10.1038/nphoton.2014.49]
[8]   Models of reduced-noise, probabilistic linear amplifiers [J].
Combes, Joshua ;
Walk, Nathan ;
Lund, A. P. ;
Ralph, T. C. ;
Caves, Carlton M. .
PHYSICAL REVIEW A, 2016, 93 (05)
[9]   A high-gain and high-fidelity coherent state comparison amplifier [J].
Donaldson, Ross J. ;
Mazzarella, Luca ;
Collins, Robert J. ;
Jeffers, John ;
Buller, Gerald S. .
COMMUNICATIONS PHYSICS, 2018, 1
[10]   Quantum Optical State Comparison Amplifier [J].
Eleftheriadou, Electra ;
Barnett, Stephen M. ;
Jeffers, John .
PHYSICAL REVIEW LETTERS, 2013, 111 (21)
12