Photon echo quantum memory and method
AssigneeCentre National De La Recherche Scientifique
InventorsJean-Louis Le Gouet, Thierry Chaneliere
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Abstract
A quantum memory and method are proposed. The quantum memory includes an ensemble of atoms embedded in a storage medium and at least one light source for emitting towards the storage medium first, second and third light pulses, the first light pulse carrying information to be stored. The at least one light source is adapted for emitting second and third light pulses which are such that a photon echo substantially carrying information stored by the first light pulse is emitted by the ensemble of atoms after emission of the third light pulse.
Claims44
A quantum memory intended to store an incoming quantum light pulse, comprising:
- an ensemble of atoms embedded in a storage medium;
- and
- at least one light source for emitting towards the storage medium first, second and third light pulses, the first light pulse carrying information to be stored;
- wherein the at least one light source is adapted for emitting second and third light pulses which are such that a photon echo substantially carrying information stored by the first light pulse is emitted by the ensemble of atoms after emission of the third light pulse.
A quantum information retrieval apparatus intended to retrieve quantum light information stored by a first light pulse in an ensemble of atoms embedded in a storage medium, the apparatus comprising:
- at least one light source for emitting towards the storage medium second and third light pulses which is adapted for emitting second and third light pulses which are such that a photon echo substantially carrying quantum light information stored by the first light pulse is emitted by the ensemble of atoms after emission of the third light pulse.
A method for storing and retrieving quantum information from a quantum memory comprising an ensemble of atoms embedded in a storage medium, the method comprising:
- emitting towards the storage medium a first light pulse that carries quantum information to be stored;
- and
- emitting towards the storage medium second and third light pulses, wherein the second and third light pulses are such that a photon echo substantially carrying information stored by the first light pulse is emitted by the ensemble of atoms only after emission of the third light pulse.
A method for retrieving quantum information stored in a quantum memory comprising an ensemble of atoms embedded in a storage medium by means of a first light pulse, the method comprising:
- emitting towards the storage medium second and third light pulses, wherein the second and third light pulses are such that a photon echo substantially carrying information stored by the first light pulse is emitted by the ensemble of atoms only after emission of the third light pulse.
Dependencies are inferred from the claim text.