Optical propagation in a nonhomogeneous medium and squeezed states

1994 ◽  
Vol 72 (1-2) ◽  
pp. 30-32 ◽  
Author(s):  
Jing-Bo Xu ◽  
Xiao-Chun Gao
Keyword(s):  
Squeezed States ◽  
Finite Width ◽  
Nonhomogeneous Medium ◽  
Basic Invariant ◽  
Optical Propagation ◽  
Propagation Of Waves

In this paper, using the concept of the basic invariant, we study optical propagation in a nonhomogeneous medium and obtain the squeezed states for the system. These should be of importance for the discussion of the propagation of waves with finite width.

Algebraic view of the optical propagation in a nonhomogeneous medium

1987 ◽  
Vol 35 (4) ◽  
pp. 1668-1672 ◽  
Author(s):  
G. Dattoli ◽  
S. Solimeno ◽  
A. Torre
Keyword(s):  
Nonhomogeneous Medium ◽  
Optical Propagation

scholarly journals A Scattering Problem for a Local Perturbation of an Open Periodic Waveguide

2021 ◽  
Author(s):  
Andreas Kirsch
Keyword(s):  
Scattering Problem ◽  
Radiation Condition ◽  
Index Of Refraction ◽  
Local Perturbation ◽  
Finite Width ◽  
Open Waveguide ◽  
Decay Properties ◽  
Existence And Stability ◽  
Stability Of A Solution ◽  
Propagation Of Waves

In this paper we consider the propagation of waves in an open waveguide in R^2 where the index of refraction is a local perturbation of a function which is periodic along the axis of the waveguide and equal to one outside a strip of finite width. Motivated by the limiting absorption principle (proven in an ealier paper by the author for the case of an open waveguide in the half space) we formulate a radiation condition which allows the existence of propagating modes and prove uniqueness, existence, and stability of a solution. In the last part we investigate the decay properties of the radiating part in the direction of periodicity and orthogonal to it.

Transient Propagation of Waves in a Flume

1993 ◽  
Author(s):  
Kwok Fai Cheung ◽  
Michael Isaacson ◽  
Etienne Mansard
Keyword(s):  
Propagation Of Waves

Dispersion Characteristics of Multi-Step Open Slow-Wave Systems of Finite Width: Analysis

1997 ◽  
Vol 51 (8) ◽  
pp. 77-84
Author(s):  
L. M. Buzik ◽  
O. F. Pishko ◽  
S.A. Churilova ◽  
O. I. Sheremet
Keyword(s):  
Slow Wave ◽  
Finite Width ◽  
Dispersion Characteristics

Open-loop control of compensation for optical propagation through a turbulent shear flow

1998 ◽  
Author(s):  
C. Truman ◽  
Lenore McMackin ◽  
Robert Pierson ◽  
Kenneth Bishop ◽  
Ellen Chen
Keyword(s):  
Shear Flow ◽  
Open Loop ◽  
Turbulent Shear ◽  
Turbulent Shear Flow ◽  
Open Loop Control ◽  
Loop Control ◽  
Optical Propagation

Study of Optical Propagation in Hybrid Periodic/Quasiregular Structures Based on Porous Silicon

PIERS Online ◽  
2009 ◽  
Vol 5 (2) ◽  
pp. 167-170 ◽  
Author(s):  
Jose Escorcia-García ◽  
Miguel Eduardo Mora-Ramos
Keyword(s):  
Porous Silicon ◽  
Optical Propagation

The Variation of the Plasma Sheet Polytropic Index Along the Midnight Meridian in a Finite Width Magnetotail

1990 ◽  
Author(s):  
H. E. Spence ◽  
M. G. Kivelson
Keyword(s):  
Plasma Sheet ◽  
Polytropic Index ◽  
Finite Width

Atmospheric Effects on Optical Propagation.

1996 ◽  
Author(s):  
Patrick McNicholl
Keyword(s):  
Atmospheric Effects ◽  
Optical Propagation

Quantum Tunneling

2017 ◽  
Author(s):  
Frank S. Levin
Keyword(s):  
Quantum Tunneling ◽  
Alpha Particles ◽  
Attractive Potential ◽  
Scanning Tunneling ◽  
Finite Width ◽  
Potential Well ◽  
Surface Molecules ◽  
Repulsive Coulomb ◽  
The Subject ◽  
The One

Quantum tunneling, wherein a quanject has a non-zero probability of tunneling into and then exiting a barrier of finite width and height, is the subject of Chapter 13. The description for the one-dimensional case is extended to the barrier being inverted, which forms an attractive potential well. The first application of this analysis is to the emission of alpha particles from the decay of radioactive nuclei, where the alpha-nucleus attraction is modeled by a potential well and the barrier is the repulsive Coulomb potential. Excellent results are obtained. Ditto for the similar analysis of proton burning in stars and yet a different analysis that explains tunneling through a Josephson junction, the connector between two superconductors. The final application is to the scanning tunneling microscope, a device that allows the microscopic surfaces of solids to be mapped via electrons from the surface molecules tunneling into the tip of the STM probe.

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.

Sign in / Sign up

Export Citation Format

Share Document