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Journal article

Optimal quantum circuits for general phase estimation.

Abstract:

We address the problem of estimating the phase phi given N copies of the phase-rotation gate uphi. We consider, for the first time, the optimization of the general case where the circuit consists of an arbitrary input state, followed by any arrangement of the N phase rotations interspersed with arbitrary quantum operations, and ending with a general measurement. Using the polynomial method, we show that, in all cases where the measure of quality of the estimate phi for phi depends only on the...

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Publication status:
Published

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Journal:
Physical review letters
Volume:
98
Issue:
9
Pages:
090501
Publication date:
2007-03-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:1018f7bd-f56a-459b-a32b-9cfdbbb27d99
Source identifiers:
154464
Local pid:
pubs:154464
Language:
English

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