Cavity QED nondemolition measurement scheme using quantized atomic motion

2009 ◽  
Vol 80 (5) ◽  
Author(s):  
Jonas Larson ◽  
Mahmoud Abdel-Aty
Keyword(s):  
Cavity Qed ◽  
Atomic Motion ◽  
Measurement Scheme

Sequential phonon measurements of atomic motion

2021 ◽  
Author(s):  
Atirach Ritboon ◽  
Lukáš Slodička ◽  
Radim Filip
Keyword(s):  
Cavity Qed ◽  
Quantum Fisher Information ◽  
Atomic Motion ◽  
Circuit Qed ◽  
Fock States ◽  
Fock State ◽  
Atomic Vibrations ◽  
State Generation ◽  
Available Information ◽  
Mechanical Sensing

Abstract The motion of trapped atoms plays an essential role in quantum mechanical sensing, simulations and computing. Small disturbances of atomic vibrations are still challenging to be sensitively detected. It requires a reliable coupling between individual phonons and internal electronic levels that light can readout. As available information in a few electronic levels about the phonons is limited, the coupling needs to be sequentially repeated to further harvest the remaining information. We analyze such phonon measurements on the simplest example of the force and heating sensing using motional Fock states. We prove that two sequential measurements are sufficient to reach sensitivity to force and heating for realistic Fock states and saturate the quantum Fisher information for a small amount of force or heating. It is achieved by the conventionally available Jaynes-Cummings coupling. The achieved sensitivities are found to be better than those obtained from classical states. Further enhancements are expectable when the higher Fock state generation is improved. The result opens additional applications of sequential phonon measurements of atomic motion. This measurement scheme can also be directly applied to other bosonic systems including cavity QED and circuit QED.

scholarly journals Feedback cooling of atomic motion in cavity QED

2006 ◽  
Vol 74 (1) ◽  
Author(s):  
Daniel A. Steck ◽  
Kurt Jacobs ◽  
Hideo Mabuchi ◽  
Salman Habib ◽  
Tanmoy Bhattacharya
Keyword(s):  
Cavity Qed ◽  
Atomic Motion

Simple quantum information algorithms in cavity QED

2003 ◽  
Vol 50 (6-7) ◽  
pp. 901-913 ◽  
Author(s):  
H. Ollivier ◽  
F. Yamaguchi ◽  
M. Brune ◽  
J. M. Raimond ◽  
S. Haroche ◽  
...  
Keyword(s):  
Quantum Information ◽  
Cavity Qed ◽  
Simple Quantum

Spin nutation induced by atomic motion in a magnetic lattice

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Y. Kobayashi ◽  
Y. Shiraishi ◽  
A. Hatakeyama
Keyword(s):  
Atomic Motion

Implementation of a single-photon fully quantum router with cavity QED and linear optics

2021 ◽  
Vol 53 (1) ◽  
Author(s):  
Cong Cao ◽  
Yu-Hong Han ◽  
Xin Yi ◽  
Pan-Pan Yin ◽  
Xiu-Yu Zhang ◽  
...  
Keyword(s):  
Cavity Qed ◽  
Single Photon ◽  
Linear Optics ◽  
Quantum Router

GEOMETRIC PHASE AND DISENTANGLEMENT OF A MOVING FOUR-LEVEL ATOM IN THE PRESENCE OF NONLINEAR MEDIUM

2012 ◽  
Vol 10 (01) ◽  
pp. 1250007 ◽  
Author(s):  
NOUR ZIDAN ◽  
S. ABDEL-KHALEK ◽  
M. ABDEL-ATY
Keyword(s):  
System Dynamics ◽  
Geometric Phase ◽  
Nonlinear Medium ◽  
Atomic Motion ◽  
Kerr Medium ◽  
Mode Structure ◽  
Field Mode ◽  
Level Atom

In this paper, we investigate the geometric phase of the field interacting with a moving four-level atom in the presence of Kerr medium. The results show that the atomic motion, the field-mode structure and Kerr medium play important roles in the evolution of the system dynamics. As illustration, we examine the behavior of the geometric phase and entanglement with experimentally accessible parameters. Some new aspects are observed and discussed.

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