O'Sullivan, James;
Kennedy, Oscar W;
Debnath, Kamanasish;
Alexander, Joseph;
Zollitsch, Christoph W;
Simenas, Mantas;
Hashim, Akel;
... Morton, John JL; + view all
(2022)
Random-Access Quantum Memory Using Chirped Pulse Phase Encoding.
Physical Review X
, 12
(4)
, Article 041014. 10.1103/PhysRevX.12.041014.
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Abstract
As in conventional computing, memories for quantum information benefit from high storage density and, crucially, random access, or the ability to read from or write to an arbitrarily chosen register. However, achieving such random access with quantum memories in a dense, hardware-efficient manner remains a challenge. Here we introduce a protocol using chirped pulses to encode qubits within an ensemble of quantum two-level systems, offering both random access and naturally supporting dynamical decoupling to enhance the memory lifetime. We demonstrate the protocol in the microwave regime using donor spins in silicon coupled to a superconducting cavity, storing up to four weak, coherent microwave pulses in distinct memory modes and retrieving them on demand up to 2 ms later. This approach offers the potential for microwave random access quantum memories with lifetimes exceeding seconds, while the chirped pulse phase encoding could also be applied in the optical regime to enhance quantum repeaters and networks.
| Type: | Article |
|---|---|
| Title: | Random-Access Quantum Memory Using Chirped Pulse Phase Encoding |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevX.12.041014 |
| Publisher version: | https://doi.org/10.1103/PhysRevX.12.041014 |
| Language: | English |
| Additional information: | © 2022 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10161303 |
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