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Algorithmic cooling of nuclear spins using long-lived singlet order

Algorithmic cooling of nuclear spins using long-lived singlet order
Algorithmic cooling of nuclear spins using long-lived singlet order
Algorithmic cooling methods manipulate an open quantum system in order to lower its temperature below that of the environment. We achieve significant cooling of an ensemble of nuclear spin-pair systems by exploiting the long-lived nuclear singlet state, which is an antisymmetric quantum superposition of the "up" and "down" Zeeman states. The effect is demonstrated by nuclear magnetic resonance (NMR) experiments on a molecular system containing a coupled pair of near-equivalent 13C nuclei. The populations of the system are subjected to a repeating sequence of cyclic permutations separated by relaxation intervals. The long-lived nuclear singlet order is pumped well beyond the unitary limit. The pumped singlet order is converted into nuclear magnetization which is enhanced by 21% relative to its thermal equilibrium value.
0021-9606
1-16
Rodin, Bogdan A.
4acb30d2-f195-40d3-8342-687972204fea
Bengs, Christian
cd3282d0-27ad-444f-bcb4-70eeab0029b9
Kiryutin, Alexey S.
ffacc043-b9d2-468c-9144-09f120456bbf
Sheberstov, Kirill F.
e7c3ad09-79aa-44b2-91c2-2ced601f5484
Brown, Lynda
75aa95fa-5d27-46a7-9dbe-0f465a664f5b
Brown, Richard
21ce697a-7c3a-480e-919f-429a3d8550f5
Yurkovskaya, Alexandra V.
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Ivanov, Konstantin L.
2045cc39-48f7-42ce-b64d-f4f2c189f49c
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Rodin, Bogdan A.
4acb30d2-f195-40d3-8342-687972204fea
Bengs, Christian
cd3282d0-27ad-444f-bcb4-70eeab0029b9
Kiryutin, Alexey S.
ffacc043-b9d2-468c-9144-09f120456bbf
Sheberstov, Kirill F.
e7c3ad09-79aa-44b2-91c2-2ced601f5484
Brown, Lynda
75aa95fa-5d27-46a7-9dbe-0f465a664f5b
Brown, Richard
21ce697a-7c3a-480e-919f-429a3d8550f5
Yurkovskaya, Alexandra V.
24a2449e-3a3c-497c-b7b9-144aa8919651
Ivanov, Konstantin L.
2045cc39-48f7-42ce-b64d-f4f2c189f49c
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3

Rodin, Bogdan A., Bengs, Christian, Kiryutin, Alexey S., Sheberstov, Kirill F., Brown, Lynda, Brown, Richard, Yurkovskaya, Alexandra V., Ivanov, Konstantin L. and Levitt, Malcolm H. (2020) Algorithmic cooling of nuclear spins using long-lived singlet order. Journal of Chemical Physics, 152 (16), 1-16. (doi:10.1063/5.0006742).

Record type: Article

Abstract

Algorithmic cooling methods manipulate an open quantum system in order to lower its temperature below that of the environment. We achieve significant cooling of an ensemble of nuclear spin-pair systems by exploiting the long-lived nuclear singlet state, which is an antisymmetric quantum superposition of the "up" and "down" Zeeman states. The effect is demonstrated by nuclear magnetic resonance (NMR) experiments on a molecular system containing a coupled pair of near-equivalent 13C nuclei. The populations of the system are subjected to a repeating sequence of cyclic permutations separated by relaxation intervals. The long-lived nuclear singlet order is pumped well beyond the unitary limit. The pumped singlet order is converted into nuclear magnetization which is enhanced by 21% relative to its thermal equilibrium value.

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More information

Accepted/In Press date: 3 April 2020
e-pub ahead of print date: 27 April 2020
Published date: 30 April 2020

Identifiers

Local EPrints ID: 439317
URI: http://eprints.soton.ac.uk/id/eprint/439317
ISSN: 0021-9606
PURE UUID: adf3692e-9030-4bb3-8e01-acd8392ee674
ORCID for Lynda Brown: ORCID iD orcid.org/0000-0002-5678-0814
ORCID for Richard Brown: ORCID iD orcid.org/0000-0003-0156-7087
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

Catalogue record

Date deposited: 08 Apr 2020 16:32
Last modified: 18 Feb 2021 16:56

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Contributors

Author: Bogdan A. Rodin
Author: Christian Bengs
Author: Alexey S. Kiryutin
Author: Kirill F. Sheberstov
Author: Lynda Brown ORCID iD
Author: Richard Brown ORCID iD
Author: Alexandra V. Yurkovskaya
Author: Konstantin L. Ivanov

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