Atomic squeezing and quantum memory in a three-level system

2004 ◽  
Author(s):  
Aurelien Dantan ◽  
Michel Pinard ◽  
Paul R. Berman
Keyword(s):  
Quantum Memory ◽  
Level System ◽  
Atomic Squeezing

scholarly journals Understanding of Collective Atom Phase Control in Modified Photon Echoes for a Near-Perfect Storage Time-Extended Quantum Memory

Entropy ◽  
2020 ◽  
Vol 22 (8) ◽  
pp. 900 ◽  
Author(s):  
Rahmat Ullah ◽  
Byoung S. Ham
Keyword(s):  
Storage Time ◽  
Photon Echo ◽  
Matching Condition ◽  
Propagation Direction ◽  
Quantum Memory ◽  
Level System ◽  
Bloch Equations ◽  
Photon Echoes ◽  
Phase Matching Condition ◽  
Maxwell Bloch Equations

A near-perfect storage time-extended photon echo-based quantum memory protocol has been analyzed by solving the Maxwell–Bloch equations for a backward scheme in a three-level system. The backward photon echo scheme is combined with a controlled coherence conversion process via controlled Rabi flopping to a third state, where the control Rabi flopping collectively shifts the phase of the ensemble coherence. The propagation direction of photon echoes is coherently determined by the phase-matching condition between the data (quantum) and the control (classical) pulses. Herein, we discuss the classical controllability of a quantum state for both phase and propagation direction by manipulating the control pulses in both single and double rephasing photon echo schemes of a three-level system. Compared with the well-understood uses of two-level photon echoes, the Maxwell–Bloch equations for a three-level system have a critical limitation regarding the phase change when interacting with an arbitrary control pulse area.

Quantum description of light–matter coupling

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Cavity Mode ◽  
Optical Field ◽  
Level System ◽  
Bloch Equations ◽  
Optical Bloch Equations ◽  
Matter Coupling ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Full Quantum ◽  
The Ideal

In this chapter we study with the tools developed in Chapter 3 the basic models that are the foundations of light–matter interaction. We start with Rabi dynamics, then consider the optical Bloch equations that add phenomenologically the lifetime of the populations. As decay and pumping are often important, we cover the Lindblad form, a correct, simple and powerful way to describe various dissipation mechanisms. Then we go to a full quantum picture, quantizing also the optical field. We first investigate the simpler coupling of bosons and then culminate with the Jaynes–Cummings model and its solution to the quantum interaction of a two-level system with a cavity mode. Finally, we investigate a broader family of models where the material excitation operators differ from the ideal limits of a Bose and a Fermi field.

scholarly journals Revealing the nonlinear response of a tunneling two-level system ensemble using coupled modes

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Naftali Kirsh ◽  
Elisha Svetitsky ◽  
Alexander L. Burin ◽  
Moshe Schechter ◽  
Nadav Katz
Keyword(s):  
Nonlinear Response ◽  
Level System ◽  
Coupled Modes

Density matrix and purity evolution in dissipative two-level systems: II. Relaxation

2021 ◽  
Author(s):  
Sambarta Chatterjee ◽  
Nancy Makri
Keyword(s):  
Density Matrix ◽  
Time Evolution ◽  
Reduced Density Matrix ◽  
Level System ◽  
Two Level Systems ◽  
Reduced Density ◽  
Harmonic Bath

We investigate the time evolution of the reduced density matrix (RDM) and its purity in the dynamics of a two-level system coupled to a dissipative harmonic bath, when the system is initially placed in one of its eigenstates.

Dynamic squeezing in a single-mode boson field interacting with two-level system

2003 ◽  
Vol 101 (1-2) ◽  
pp. 101-114 ◽  
Author(s):  
T. Sandu ◽  
V. Chihaia ◽  
W.P. Kirk
Keyword(s):  
Single Mode ◽  
Boson Field ◽  
Level System
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