Interference of Single Photons Emitted by Entangled Atoms in Free Space

被引：32

作者：

Araneda, G. ^{[1
]}

Higginbottom, D. B. ^{[1
,2
]}

Slodicka, L. ^{[3
]}

Colombe, Y. ^{[1
]}

Blatt, R. ^{[1
,4
]}

机构：

[1] Univ Innsbruck, Inst Expt Phys, Technikerstr 25, A-6020 Innsbruck, Austria

[2] Australian Natl Univ, Ctr Quantum Computat & Commun Technol, Res Sch Phys & Engn, Canberra, ACT 2601, Australia

[3] Palacky Univ, Dept Opt, 17 Listopadu 12, Olomouc 77146, Czech Republic

[4] Austrian Acad Sci, Inst Quantenopt & Quanteninformat, Technikerstr 21a, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 19期

基金：

澳大利亚研究理事会; 奥地利科学基金会; 欧洲研究理事会;

关键词：

TRAPPED IONS; QUANTUM; CAVITY; STATES; SUPERRADIANCE; METROLOGY; DISTANCE; SYSTEMS; LOGIC;

D O I：

10.1103/PhysRevLett.120.193603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The generation and manipulation of entanglement between isolated particles has precipitated rapid progress in quantum information processing. Entanglement is also known to play an essential role in the optical properties of atomic ensembles, but fundamental effects in the controlled emission and absorption from small, well-defined numbers of entangled emitters in free space have remained unobserved. Here we present the control of the emission rate of a single photon from a pair of distant, entangled atoms into a free-space optical mode. Changing the length of the optical path connecting the atoms modulates the single-photon emission rate in the selected mode with a visibility V = 0.27 = +/- 0.03 determined by the degree of entanglement shared between the atoms, corresponding directly to the concurrence C-p = 0.31 +/- 0.10 of the prepared state. This scheme, together with population measurements, provides a fully optical determination of the amount of entanglement. Furthermore, large sensitivity of the interference phase evolution points to applications of the presented scheme in high-precision gradient sensing.

引用

页数：5

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