Generation of squeezed light via spontaneous emission from a three-level cascade system
| Autor: | Bryan J. Dalton, M. R. Ferguson, Z. Ficek |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics business.industry Quantum Physics Source field Atomic and Molecular Physics and Optics Three level Electronic Optical and Magnetic Materials Superposition principle Optics Cascade Atom Spontaneous emission Electrical and Electronic Engineering Physical and Theoretical Chemistry Atomic physics business Squeezed coherent state Coherence (physics) |
| Zdroj: | Optics Communications. 127:48-54 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/0030-4018(96)00113-7 |
| Popis: | A theoretical investigation is made into the possibility of generating squeezed states of light in spontaneous emission from a three-level atom. Spontaneous emission is known as a source of the noise which destroys coherence effects. We find that rather than destroy squeezing, spontaneous emission from a three-level cascade system can actually create squeezing in an initially unsqueezed source field provided the atom is initially prepared in a suitable superposition of its states. We show that the ability of a three-level atom to generate squeezing of the source field via spontaneous emission relies on the presence of non-zero two-photon coherences that are not present in two-level atoms, in which source field squeezing only occurs if it is present initially. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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