Dynamics of slow light and light storage in a Doppler-broadened electromagnetically-induced-transparency medium: A numerical approach

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.013827· OSTI ID:21537068

Su, Shih-Wei; Chen, Yi-Hsin; Yu, Ite A ^[1]; Gou, Shih-Chuan ^[2]; Horng, Tzyy-Leng ^[3]

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1. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
2. Department of Physics, National Changhua University of Education, Changhua 50058, Taiwan (China)
3. Department of Applied Mathematics, Feng Chia University, Taichung 40074, Taiwan (China)

We present a numerical scheme to study the dynamics of slow light and light storage in an electromagnetically-induced-transparency (EIT) medium at finite temperatures. Allowing for the motional coupling, we derive a set of coupled Schroedinger equations describing a boosted closed three-level EIT system according to the principle of Galilean relativity. The dynamics of a uniformly moving EIT medium can thus be determined by numerically integrating the coupled Schroedinger equations for atoms plus one ancillary Maxwell-Schroedinger equation for the probe pulse. The central idea of this work rests on the assumption that the loss of ground-state coherence at finite temperatures can be ascribed to the incoherent superposition of density matrices representing the EIT systems with various velocities. Close agreements are demonstrated in comparing the numerical results with the experimental data for both slow light and light storage. In particular, the distinct characters featuring the decay of ground-state coherence can be well verified for slow light and light storage. This warrants that the current scheme can be applied to determine the decaying profile of the ground-state coherence as well as the temperature of the EIT medium.

• OSTI ID: 21537068
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
COUPLING
DATA
DECAY
DENSITY MATRIX
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EQUATIONS
EXPERIMENTAL DATA
GROUND STATES
INFORMATION
MATRICES
NUMERICAL DATA
OPACITY
OPTICAL PROPERTIES
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PULSES
RADIATIONS
SCHROEDINGER EQUATION
VISIBLE RADIATION
WAVE EQUATIONS