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Propagation of Squeezed Vacuum under Electromagnetically Induced Transparency

(2008)

Authors:

Eden Figueroa, Mirko Lobino, Dmitry Korystov, Juergen Appel, AI Lvovsky
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Photons as quasicharged particles

Physical Review A American Physical Society (APS) 77:4 (2008) 043813

Authors:

K-P Marzlin, Jürgen Appel, AI Lvovsky
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Quantum memory for squeezed light.

Physical review letters 100:9 (2008) 093602

Authors:

Jürgen Appel, Eden Figueroa, Dmitry Korystov, M Lobino, AI Lvovsky

Abstract:

We produce a 600-ns pulse of 1.86-dB squeezed vacuum at 795 nm in an optical parametric amplifier and store it in a rubidium vapor cell for 1 mus using electromagnetically induced transparency. The recovered pulse, analyzed using time-domain homodyne tomography, exhibits up to 0.21+/-0.04 dB of squeezing. We identify the factors leading to the degradation of squeezing and investigate the phase evolution of the atomic coherence during the storage interval.
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Electromagnetically-Induced Transparency and Squeezed Light

Optica Publishing Group (2008) qwd2

Authors:

E Figueroa, J Appel, D Korystov, M Lobino, AI Lvovsky
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Adiabatic frequency conversion of optical information in atomic vapor.

Optics letters 32:19 (2007) 2771-2773

Authors:

Frank Vewinger, Jürgen Appel, Eden Figueroa, AI Lvovsky

Abstract:

We experimentally demonstrate a communication protocol that enables frequency conversion and routing of quantum information in an adiabatic and thus robust way. The protocol is based on electromagnetically induced transparency (EIT) in systems with multiple excited levels: transfer and/or distribution of optical states between different signal modes is implemented by adiabatically changing the control fields. The proof-of-principle experiment is performed using the hyperfine levels of the rubidium D1 line.
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