Deterministic generation of a cluster state of entangled photons

被引：309

作者：

Schwartz, I. ^{[1
,2
]}

Cogan, D. ^{[1
,2
]}

Schmidgall, E. R. ^{[1
,2
,3
]}

Don, Y. ^{[1
,2
]}

Gantz, L. ^{[1
,2
]}

Kenneth, O. ^{[1
,2
]}

Lindner, N. H. ^{[1
,2
]}

Gershoni, D. ^{[1
,2
]}

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel

[3] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

SCIENCE | 2016年 / 354卷 / 6311期

基金：

欧洲研究理事会;

关键词：

QUANTUM-DOT SPIN;

D O I：

10.1126/science.aah4758

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Photonic cluster states are a resource for quantum computation based solely on single-photon measurements. We use semiconductor quantum dots to deterministically generate long strings of polarization-entangled photons in a cluster state by periodic timed excitation of a precessing matter qubit. In each period, an entangled photon is added to the cluster state formed by the matter qubit and the previously emitted photons. In our prototype device, the qubit is the confined dark exciton, and it produces strings of hundreds of photons in which the entanglement persists over five sequential photons. The measured process map characterizing the device has a fidelity of 0.81 with that of an ideal device. Further feasible improvements of this device may reduce the resources needed for optical quantum information processing.

引用

页码：434 / 437

页数：4

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