Journal article icon

Journal article

Optimal universal quantum cloning and state estimation

Abstract:

We derive a tight upper bound for the fidelity of a universal N to M qubit cloner, valid for any M \geq N, where the output of the cloner is required to be supported on the symmetric subspace. Our proof is based on the concatenation of two cloners and the connection between quantum cloning and quantum state estimation. We generalise the operation of a quantum cloner to mixed and/or entangled input qubits described by a density matrix supported on the symmetric subspace of the constituent qubi...

Expand abstract
Publication status:
Published
Peer review status:
Peer reviewed

Actions


Access Document


Files:
Publisher copy:
10.1103/PhysRevLett.81.2598

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
81
Issue:
12
Pages:
2598-2601
Publication date:
1997-12-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Keywords:
Pubs id:
pubs:313235
UUID:
uuid:b7b93469-6800-428c-bbc8-b16abde5a5d9
Local pid:
pubs:313235
Source identifiers:
313235
Deposit date:
2013-03-20

Terms of use


Views and Downloads






If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP