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 |
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
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Yoshimura, K. G., & Yamamoto, N. (2019). Generating robust entanglement via quantum feedback. Journal of Physics B: Atomic, Molecular and Optical Physics, 52(5), [055501]. https://doi.org/10.1088/1361-6455/ab00c3