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Optimal quantum operations at zero energy cost

Abstract:

Quantum technologies are developing powerful tools to generate and manipulate coherent superpositions of different energy levels. Envisaging a new generation of energy-efficient quantum devices, here we explore how coherence can be manipulated without exchanging energy with the surrounding environment. We start from the task of converting a coherent superposition of energy eigenstates into another. We identify the optimal energy-preserving operations, both in the deterministic and in the prob...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1103/PhysRevA.96.022327

Authors


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Institution:
University of Oxford
Division:
MPLS Division
Department:
Computer Science
Oxford college:
St Hildas College
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Grant:
11675136; 11450110096; 11350110207
Canadian Institute for Advanced Research More from this funder
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
96
Issue:
2
Pages:
022327
Publication date:
2017-08-29
Acceptance date:
2017-06-16
DOI:
EISSN:
2469-9934
ISSN:
2469-9926
Pubs id:
pubs:733262
URN:
uri:9a564af5-4e0c-4dee-9147-9236b1a66325
UUID:
uuid:9a564af5-4e0c-4dee-9147-9236b1a66325
Local pid:
pubs:733262
Keywords:

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