Quantum-enhanced interferometry with large heralded photon-number states

被引：40

作者：

Thekkadath, G. S. ^{[1
]}

Mycroft, M. E. ^{[2
]}

Bell, B. A. ^{[1
]}

Wade, C. G. ^{[1
]}

Eckstein, A. ^{[1
]}

Phillips, D. S. ^{[1
]}

Patel, R. B. ^{[1
]}

Buraczewski, A. ^{[2
]}

Lita, A. E. ^{[3
]}

Gerrits, T. ^{[3
,4
]}

Nam, S. W. ^{[3
]}

Stobinska, M. ^{[2
]}

Lvovsky, A. I. ^{[1
]}

Walmsley, I. A. ^{[1
,5
]}

机构：

[1] Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[2] Univ Warsaw, Fac Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland

[3] NIST, 325 Broadway, Boulder, CO 80305 USA

[4] NIST, 100 Bur Dr, Gaithersburg, MD 20899 USA

[5] Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England

来源：

NPJ QUANTUM INFORMATION | 2020年 / 6卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

PHASE; LIMIT; NOISE;

D O I：

10.1038/s41534-020-00320-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum phenomena such as entanglement can improve fundamental limits on the sensitivity of a measurement probe. In optical interferometry, a probe consisting of N entangled photons provides up to a N enhancement in phase sensitivity compared to a classical probe of the same energy. Here, we employ high-gain parametric down-conversion sources and photon-number-resolving detectors to perform interferometry with heralded quantum probes of sizes up to N = 8 (i.e. measuring up to 16-photon coincidences). Our probes are created by injecting heralded photon-number states into an interferometer, and in principle provide quantum-enhanced phase sensitivity even in the presence of significant optical loss. Our work paves the way toward quantum-enhanced interferometry using large entangled photonic states.

引用

页数：6

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