dorsal/arxiv
View SchemaTwo-mode optical state truncation and generation of maximally entangled states in pumped nonlinear couplers
| Authors | Adam Miranowicz, Wieslaw Leonski |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603149 |
| URL | https://arxiv.org/abs/quant-ph/0603149 |
| DOI | 10.1088/0953-4075/39/7/011 |
| Journal | J. Phys. B 39, 1683-1700 (2006) |
Abstract
Schemes for optical-state truncation of two cavity modes are analysed. The systems, referred to as the nonlinear quantum scissors devices, comprise two coupled nonlinear oscillators (Kerr nonlinear coupler) with one or two of them pumped by external classical fields. It is shown that the quantum evolution of the pumped couplers can be closed in a two-qubit Hilbert space spanned by vacuum and single-photon states only. Thus, the pumped couplers can behave as a two-qubit system. Analysis of time evolution of the quantum entanglement shows that Bell states can be generated. A possible implementation of the couplers is suggested in a pumped double-ring cavity with resonantly enhanced Kerr nonlinearities in an electromagnetically-induced transparency scheme. The fragility of the generated states and their entanglement due to the standard dissipation and phase damping are discussed by numerically solving two types of master equations.
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"abstract": "Schemes for optical-state truncation of two cavity modes are analysed. The\nsystems, referred to as the nonlinear quantum scissors devices, comprise two\ncoupled nonlinear oscillators (Kerr nonlinear coupler) with one or two of them\npumped by external classical fields. It is shown that the quantum evolution of\nthe pumped couplers can be closed in a two-qubit Hilbert space spanned by\nvacuum and single-photon states only. Thus, the pumped couplers can behave as a\ntwo-qubit system. Analysis of time evolution of the quantum entanglement shows\nthat Bell states can be generated. A possible implementation of the couplers is\nsuggested in a pumped double-ring cavity with resonantly enhanced Kerr\nnonlinearities in an electromagnetically-induced transparency scheme. The\nfragility of the generated states and their entanglement due to the standard\ndissipation and phase damping are discussed by numerically solving two types of\nmaster equations.",
"arxiv_id": "quant-ph/0603149",
"authors": [
"Adam Miranowicz",
"Wieslaw Leonski"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/0953-4075/39/7/011",
"journal_ref": "J. Phys. B 39, 1683-1700 (2006)",
"title": "Two-mode optical state truncation and generation of maximally entangled states in pumped nonlinear couplers",
"url": "https://arxiv.org/abs/quant-ph/0603149"
},
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