dorsal/arxiv
View SchemaPractical purification scheme for decohered coherent-state superpositions via partial homodyne detection
| Authors | Shigenari Suzuki, Masahiro Takeoka, Masahide Sasaki, Ulrik L. Andersen, Fumihiko Kannari |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0510235 |
| URL | https://arxiv.org/abs/quant-ph/0510235 |
| DOI | 10.1103/PhysRevA.73.042304 |
| Journal | Phys. Rev. A 73, 042304 (2006) |
Abstract
We present a simple protocol to purify a coherent-state superposition that has undergone a linear lossy channel. The scheme constitutes only a single beam splitter and a homodyne detector, and thus is experimentally feasible. In practice, a superposition of coherent states is transformed into a classical mixture of coherent states by linear loss, which is usually the dominant decoherence mechanism in optical systems. We also address the possibility of producing a larger amplitude superposition state from decohered states, and show that in most cases the decoherence of the states are amplified along with the amplitude.
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"abstract": "We present a simple protocol to purify a coherent-state superposition that\nhas undergone a linear lossy channel. The scheme constitutes only a single beam\nsplitter and a homodyne detector, and thus is experimentally feasible. In\npractice, a superposition of coherent states is transformed into a classical\nmixture of coherent states by linear loss, which is usually the dominant\ndecoherence mechanism in optical systems. We also address the possibility of\nproducing a larger amplitude superposition state from decohered states, and\nshow that in most cases the decoherence of the states are amplified along with\nthe amplitude.",
"arxiv_id": "quant-ph/0510235",
"authors": [
"Shigenari Suzuki",
"Masahiro Takeoka",
"Masahide Sasaki",
"Ulrik L. Andersen",
"Fumihiko Kannari"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.042304",
"journal_ref": "Phys. Rev. A 73, 042304 (2006)",
"title": "Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection",
"url": "https://arxiv.org/abs/quant-ph/0510235"
},
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