Quantum universal detectors

被引：18

作者：

D'Ariano, GM

Perinotti, P

Sacchi, MF

机构：

[1] Univ Pavia, Unita INFM, Quantum Opt & Informat Grp, I-27100 Pavia, Italy

[2] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

来源：

EUROPHYSICS LETTERS | 2004年 / 65卷 / 02期

关键词：

D O I：

10.1209/epl/i2003-10079-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We address the problem of achieving a universal measuring apparatus that allows to estimate the expectation value of any arbitrary operator by changing only the data processing of the outcomes. The "universal detector" performs a joint measurement on the system and on a suitably prepared ancilla. We characterize such universal detectors, and show how they can be obtained either via Bell measurements or via local measurements and classical communication between system and ancilla.

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收藏

页码：165 / 171

页数：7

相关论文

共 33 条

[1] SUFFICIENT CONDITIONS FOR CONVERGENCE OF ANTINORMALLY ORDERED EXPANSIONS OF BOSON NUMBER OPERATOR-FUNCTIONS F(A+A) [J].

BALTIN, R .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1983, 16 (12) :2721-2742

[2] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].

BENNETT, CH ;

BRASSARD, G ;

CREPEAU, C ;

JOZSA, R ;

PERES, A ;

WOOTTERS, WK .

PHYSICAL REVIEW LETTERS, 1993, 70 (13) :1895-1899

[3] QUANTUM CRYPTOGRAPHY [J].

BENNETT, CH ;

BRASSARD, G ;

EKERT, AK .

SCIENTIFIC AMERICAN, 1992, 267 (04) :50-57

[4] Purification of noisy entanglement and faithful teleportation via noisy channels [J].

Bennett, CH ;

Brassard, G ;

Popescu, S ;

Schumacher, B ;

Smolin, JA ;

Wootters, WK .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :722-725

[5] Universal teleportation with a twist [J].

Braunstein, SL ;

D'Ariano, GM ;

Milburn, GJ ;

Sacchi, MF .

PHYSICAL REVIEW LETTERS, 2000, 84 (15) :3486-3489

[6] Teleportation of continuous quantum variables [J].

Braunstein, SL ;

Kimble, HJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :869-872

[7] Two-photon diffraction and quantum lithography [J].

D'Angelo, M ;

Chekhova, MV ;

Shih, Y .

PHYSICAL REVIEW LETTERS, 2001, 87 (01)

[8] Bell measurements and observables [J].

D'Ariano, GM ;

Lo Presti, P ;

Sacchi, MF .

PHYSICS LETTERS A, 2000, 272 (1-2) :32-38

[9] Improving quantum interferometry by using entanglement [J].

D'Ariano, GM ;

Paris, MGA ;

Perinotti, P .

PHYSICAL REVIEW A, 2002, 65 (06) :9

[10] Using entanglement improves the precision of quantum measurements [J].

D'Ariano, GM ;

Lo Presti, P ;

Paris, MGA .

PHYSICAL REVIEW LETTERS, 2001, 87 (27) :270404-270404

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