aqora

Nonvolatile atomic memory in the spontaneous scattering of light from cold two-level atoms

Raoni S. N. Moreira, Paulo J. Cavalcanti, Luis F. Muñoz-Martínez +4 more

Optics CommunicationsApr 29, 20215 citations

Electro-Optic Quantum Memory for Light Using Two-Level Atoms

Gabriel Hetet, Jevon J. Longdell, A. L. Alexander +2 more

We present a simple quantum memory scheme that allows for the storage of a light field in an ensemble of two-level atoms. The technique is analogous to the NMR gradient echo for which the imprinting and recalling of the input field are performed by controlling a linearly varying broadening. Our protocol is perfectly efficient in the limit of high optical depths and the output pulse is emitted in the forward direction. We provide a numerical analysis of the protocol together with an experiment performed in a solid state system. In close agreement with our model, the experiment shows a total efficiency of up to 15%, and a recall efficiency of 26%. We suggest simple realizable improvements for the experiment to surpass the no-cloning limit.We present a simple quantum memory scheme that allows for the storage of a light field in an ensemble of two-level atoms. The technique is analogous to the NMR gradient echo for which the imprinting and recalling of the input field are performed by controlling a linearly varying broadening. Our protocol is perfectly efficient in the limit of high optical depths and the output pulse is emitted in the forward direction. We provide a numerical analysis of the protocol together with an experiment performed in a solid state system. In close agreement with our model, the experiment shows a total efficiency of up to 15%, and a recall efficiency of 26%. We suggest simple realizable improvements for the experiment to surpass the no-cloning limit.

arXiv:quant-ph/0612169Physical Review LettersJan 16, 2008211 citations

Analysis of Quantum Light Memory in Atomic Systems

A. Rostami

Lecture notes in computer scienceJan 1, 20040 citations

Efficient quantum memory for light

Morgan P. Hedges, Jevon J. Longdell, Yongmin Li +1 more

NatureJun 1, 2010616 citations

An efficient quantum memory based on two-level atoms

Ivan Iakoupov, Anders Søndberg Sørensen

We propose a method to implement a quantum memory for light based on ensembles of two-level atoms. Our protocol is based on controlled reversible inhomogeneous broadening (CRIB), where an external field first dephases the atomic polarization and thereby stores an incoming light pulse into collective states of the atomic ensemble, and later a reversal of the applied field leads to a rephasing of the atomic polarization and a reemission of the light. As opposed to previous proposals for CRIB-based quantum memories, we propose only applying the broadening for a short period after most of the pulse has already been absorbed by the ensemble. We show that with this procedure there exist certain modes of the incoming light field that can be stored with an efficiency approaching 100% in the limit of high optical depth and long coherence time of the atoms. These results demonstrate that it is possible to operate an efficient quantum memory without any optical control fields.We propose a method to implement a quantum memory for light based on ensembles of two-level atoms. Our protocol is based on controlled reversible inhomogeneous broadening (CRIB), where an external field first dephases the atomic polarization and thereby stores an incoming light pulse into collective states of the atomic ensemble, and later a reversal of the applied field leads to a rephasing of the atomic polarization and a reemission of the light. As opposed to previous proposals for CRIB-based quantum memories, we propose only applying the broadening for a short period after most of the pulse has already been absorbed by the ensemble. We show that with this procedure there exist certain modes of the incoming light field that can be stored with an efficiency approaching 100% in the limit of high optical depth and long coherence time of the atoms. These results demonstrate that it is possible to operate an efficient quantum memory without any optical control fields.

arXiv:1301.0705New Journal of PhysicsAug 13, 201317 citations

Experimental demonstration of quantum memory for light

Brian Julsgaard, Jacob Friis Sherson, J. I. Cirac +2 more

arXiv:quant-ph/0410072NatureNov 1, 2004851 citations

Analysis of Quantum Memory Efficiency for Light Based on Two-Level Atoms

Related papers

Analysis of Quantum Memory Efficiency for Light Based on Two-Level Atoms

Related papers