High fidelity storage and retrieval of quantum information in a warm atomic vapor cell device
AssigneeQunnect, Inc.
InventorsMehdi Namazi, Mael Flament, Yang Wang, Alexander Craddock
Life of this patent
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Abstract
A quantum memory device and methods for storage and retrieval of a qubit from the quantum memory device are described. The quantum memory device includes a first optical component to convert an input qubit encoded in an arbitrary polarization state of a photon into a spatial qubit propagating in a pair of parallel optical rails, an atomic vapor memory to store the spatial qubit in an atomic vapor, and a second optical component to combine the spatial qubit, when retrieved from the atomic vapor memory, into an output qubit encoded in an arbitrary polarization state of a photon.
Claims20
A quantum memory device, comprising:
- a first optical component configured to convert an input qubit encoded in an arbitrary polarization state of a photon into a spatial qubit propagating in a pair of parallel optical rails;
- an atomic vapor memory coupled to an output of the first optical component and configured to store the spatial qubit in an atomic vapor;
- and
- a second optical component coupled to an output of the atomic vapor memory, the second optical component configured to convert the spatial qubit, when retrieved from the atomic vapor memory, into an output qubit, the output qubit encoded in the arbitrary polarization state of a photon.
A method of storing and retrieving a qubit, the method comprising:
- receiving a qubit encoded in an arbitrary polarization state of a photon;
- converting, using a first optical component comprising a Sagnac-like configuration of optical elements, the qubit into a spatial qubit propagating in a pair of parallel optical rails;
- storing the spatial qubit in an atomic vapor memory;
- retrieving and outputting the spatial qubit from the atomic vapor memory;
- reconverting, using a second optical component comprising a Sagnac-like configuration of optical elements, the spatial qubit into the qubit encoded in the arbitrary polarization state;
- and
- outputting the qubit.
Dependencies are inferred from the claim text.