An Introduction to Squeezed States

1986 ◽  
pp. 271-278
Author(s):  
John R. Klauder
Keyword(s):  
Squeezed States

scholarly journals Overcoming detection loss and noise in squeezing-based optical sensing

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Gaetano Frascella ◽  
Sascha Agne ◽  
Farid Ya. Khalili ◽  
Maria V. Chekhova
Keyword(s):  
Shot Noise ◽  
Optical Sensing ◽  
Detection Efficiency ◽  
Signal To Noise Ratio ◽  
Real Life ◽  
Squeezed States ◽  
Squeezed Light ◽  
Noise Limit ◽  
Imaging And Spectroscopy ◽  
Shot Noise Limit

AbstractAmong the known resources of quantum metrology, one of the most practical and efficient is squeezing. Squeezed states of atoms and light improve the sensing of the phase, magnetic field, polarization, mechanical displacement. They promise to considerably increase signal-to-noise ratio in imaging and spectroscopy, and are already used in real-life gravitational-wave detectors. But despite being more robust than other states, they are still very fragile, which narrows the scope of their application. In particular, squeezed states are useless in measurements where the detection is inefficient or the noise is high. Here, we experimentally demonstrate a remedy against loss and noise: strong noiseless amplification before detection. This way, we achieve loss-tolerant operation of an interferometer fed with squeezed and coherent light. With only 50% detection efficiency and with noise exceeding the level of squeezed light more than 50 times, we overcome the shot-noise limit by 6 dB. Sub-shot-noise phase sensitivity survives up to 87% loss. Application of this technique to other types of optical sensing and imaging promises a full use of quantum resources in these fields.

Phase properties of superposed squeezed states

2001 ◽  
Vol 8 (6) ◽  
pp. 422-430
Author(s):  
Suc-Kyoung Hong ◽  
Chung-In Um ◽  
Kyu-Hwang Yeon
Keyword(s):  
Squeezed States ◽  
Phase Properties

scholarly journals Quantum frequency down-conversion of bright amplitude-squeezed states

2014 ◽  
Vol 22 (20) ◽  
pp. 24192 ◽  
Author(s):  
Dehuan Kong ◽  
Zongyang Li ◽  
Shaofeng Wang ◽  
Xuyang Wang ◽  
Yongmin Li
Keyword(s):  
Squeezed States ◽  
Quantum Frequency ◽  
Down Conversion

Quantum noise of modulation and squeezed states

1986 ◽  
Vol 119 (2) ◽  
pp. 51-54 ◽  
Author(s):  
Y. Ben-Aryeh
Keyword(s):  
Quantum Noise ◽  
Squeezed States

Calculation of Berry's phase in squeezed states

1991 ◽  
Vol 54 (3) ◽  
pp. 894-900
Author(s):  
E. V. Damaskinski
Keyword(s):  
Squeezed States ◽  
Berry's Phase ◽  
Berry’S Phase

Squeezed states in two-phonon devices

1988 ◽  
Vol 130 (2) ◽  
pp. 87-93 ◽  
Author(s):  
L. Sainz De Los Terreros ◽  
P. García-Fernández ◽  
F.J. Bermejo
Keyword(s):  
Squeezed States
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