Concentration of Non-maximally Entangled States via Entanglement Swapping in Cavity QED
| Autor: | Ming Yang, Xian-Cai Wang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Physics and Astronomy (miscellaneous) General Mathematics Quantum Physics Quantum entanglement State (functional analysis) Squashed entanglement Excited state Quantum mechanics Quantum electrodynamics Atom Coherent states Spontaneous emission Physics::Atomic Physics W state |
| Zdroj: | International Journal of Theoretical Physics. 50:1479-1485 |
| ISSN: | 1572-9575 0020-7748 |
| DOI: | 10.1007/s10773-010-0657-y |
| Popis: | Using the highly detuned interaction between Λ-type three-level atoms and coherent optical fields in cavity QED, we can create a maximally entangled state between an atom and a cavity mode from a non-maximally entangled atomic state and a non-maximally entangled coherent state via entanglement swapping. The averaged output entanglement of the scheme is the product of the initial two non-maximal entanglements rather than the sum of them. The impact made by the spontaneous emission from the atomic excited levels has been canceled here, which makes the current protocol more feasible. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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