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 language | English |
|---|---|
| Article number | 055501 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 52 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2019 Feb 8 |
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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 journal › Article
}
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 -