Generating robust entanglement via quantum feedback

Kensuke Gallock Yoshimura, Naoki Yamamoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Generating entangled states is one of the most important tasks in quantum information technology. However, in reality any entanglement generator must contain some characteristic uncertainty, and as a result the produced entangled state becomes an undesirable mixed state. This paper develops a coherent feedback control scheme that suppresses the characteristic uncertainty of a typical entanglement generator (the non-degenerate optical parametric oscillator) for producing robust Gaussian entangled states. In particular, we examine a two-mode squeezed state and Gaussian four-mode cluster states to demonstrate the effectiveness of the proposed control method.

Original languageEnglish
Article number055501
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume52
Issue number5
DOIs
Publication statusPublished - 2019 Feb 8

Fingerprint

generators
parametric amplifiers
feedback control

Keywords

  • Cluster states
  • Entangled states
  • Non-degenerate optical parametric oscillator
  • Quantum control
  • Quantum feedback

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Generating robust entanglement via quantum feedback. / Yoshimura, Kensuke Gallock; Yamamoto, Naoki.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 52, No. 5, 055501, 08.02.2019.

Research output: Contribution to journalArticle

@article{27023c0eea244bd9a1f98acdc95ff954,
title = "Generating robust entanglement via quantum feedback",
abstract = "Generating entangled states is one of the most important tasks in quantum information technology. However, in reality any entanglement generator must contain some characteristic uncertainty, and as a result the produced entangled state becomes an undesirable mixed state. This paper develops a coherent feedback control scheme that suppresses the characteristic uncertainty of a typical entanglement generator (the non-degenerate optical parametric oscillator) for producing robust Gaussian entangled states. In particular, we examine a two-mode squeezed state and Gaussian four-mode cluster states to demonstrate the effectiveness of the proposed control method.",
keywords = "Cluster states, Entangled states, Non-degenerate optical parametric oscillator, Quantum control, Quantum feedback",
author = "Yoshimura, {Kensuke Gallock} and Naoki Yamamoto",
year = "2019",
month = "2",
day = "8",
doi = "10.1088/1361-6455/ab00c3",
language = "English",
volume = "52",
journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",
issn = "0953-4075",
publisher = "IOP Publishing Ltd.",
number = "5",

}

TY - JOUR

T1 - Generating robust entanglement via quantum feedback

AU - Yoshimura, Kensuke Gallock

AU - Yamamoto, Naoki

PY - 2019/2/8

Y1 - 2019/2/8

N2 - Generating entangled states is one of the most important tasks in quantum information technology. However, in reality any entanglement generator must contain some characteristic uncertainty, and as a result the produced entangled state becomes an undesirable mixed state. This paper develops a coherent feedback control scheme that suppresses the characteristic uncertainty of a typical entanglement generator (the non-degenerate optical parametric oscillator) for producing robust Gaussian entangled states. In particular, we examine a two-mode squeezed state and Gaussian four-mode cluster states to demonstrate the effectiveness of the proposed control method.

AB - Generating entangled states is one of the most important tasks in quantum information technology. However, in reality any entanglement generator must contain some characteristic uncertainty, and as a result the produced entangled state becomes an undesirable mixed state. This paper develops a coherent feedback control scheme that suppresses the characteristic uncertainty of a typical entanglement generator (the non-degenerate optical parametric oscillator) for producing robust Gaussian entangled states. In particular, we examine a two-mode squeezed state and Gaussian four-mode cluster states to demonstrate the effectiveness of the proposed control method.

KW - Cluster states

KW - Entangled states

KW - Non-degenerate optical parametric oscillator

KW - Quantum control

KW - Quantum feedback

UR - http://www.scopus.com/inward/record.url?scp=85062478333&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062478333&partnerID=8YFLogxK

U2 - 10.1088/1361-6455/ab00c3

DO - 10.1088/1361-6455/ab00c3

M3 - Article

AN - SCOPUS:85062478333

VL - 52

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

SN - 0953-4075

IS - 5

M1 - 055501

ER -