Continuos-variable and EIT- Continuos-variable and EIT- based quantum memories: based quantum memories: a common perspective a common perspective Michael Fleischhauer Michael Fleischhauer Zoltan Kurucz Zoltan Kurucz Technische Universität Kaiserslautern Technische Universität Kaiserslautern DEICS III / QUDAL Feb. 2006, Eilat, Israel
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Continuos-variable and EIT-based quantum memories: a common perspective Michael Fleischhauer Zoltan Kurucz Technische Universität Kaiserslautern DEICS.
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Continuos-variable and EIT-Continuos-variable and EIT-based quantum memories: based quantum memories:
a common perspectivea common perspective
Michael FleischhauerMichael Fleischhauer
Zoltan KuruczZoltan Kurucz
Technische Universität KaiserslauternTechnische Universität Kaiserslautern
DEICS III / QUDAL Feb. 2006, Eilat, Israel
in collaboration with:in collaboration with:in collaboration with:in collaboration with:
Fleischhauer, Lukin, PRL 2000; PRA 2002; Phillips et al. PRL 2001, Kuzmich et al. Nature 2005; Eisaman et al. Nature 2005
dynamically controllable group velocity
2
3
„stopping“ of light:
Autler-Townes splitting
quasi-particle picture of EIT: quasi-particle picture of EIT: quasi-particle picture of EIT: quasi-particle picture of EIT:
large small
dark & bright-state polaritons:
in adiabatic limit:
collective spin
light-stopping = adiabatic rotation of DSP: E spin
polariton excitations:
|n |S = -N/2 |0 |S = -N/2 + n
= 0 = /2
polariton rotation:
=
ph ph at
at
time-dependent :
perfect mapping Hamiltonian
effective Hamiltonian of dynamical EIT: effective Hamiltonian of dynamical EIT: effective Hamiltonian of dynamical EIT: effective Hamiltonian of dynamical EIT: