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Variational ansatz-based quantum simulation of imaginary time evolution

Abstract:

Imaginary time evolution is a powerful tool for studying quantum systems. While it is possible to simulate with a classical computer, the time and memory requirements generally scale exponentially with the system size. Conversely, quantum computers can efficiently simulate quantum systems, but not non-unitary imaginary time evolution. We propose a variational algorithm for simulating imaginary time evolution on a hybrid quantum computer. We use this algorithm to find the ground-state energy o...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1038/s41534-019-0187-2

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Materials
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Materials
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Materials
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Oxford college:
Exeter College
Role:
Author
ORCID:
0000-0002-7766-5348
Publisher:
Springer Nature Publisher's website
Journal:
npj Quantum Information Journal website
Volume:
5
Article number:
75
Publication date:
2019-09-06
Acceptance date:
2019-08-04
DOI:
EISSN:
2056-6387
Keywords:
Pubs id:
pubs:1040286
UUID:
uuid:2372988f-7690-44a7-a34d-4b9aa0fa589d
Local pid:
pubs:1040286
Source identifiers:
1040286
Deposit date:
2019-08-09

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