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Entanglement of a Quantum Field with a Dispersive Medium
- Source :
- Physical Review Letters. 109
- Publication Year :
- 2012
- Publisher :
- American Physical Society (APS), 2012.
-
Abstract
- In this Letter we study the entanglement of a quantum radiation field interacting with a dielectric medium. In particular, we describe the quantum mixed state of a field interacting with a dielectric through plasma and Drude models and show that these generate very different entanglement behavior, as manifested in the entanglement entropy of the field. We also present a formula for a "Casimir" entanglement entropy, i.e., the distance dependence of the field entropy. Finally, we study a toy model of the interaction between two plates. In this model, the field entanglement entropy is divergent; however, as in the Casimir effect, its distance-dependent part is finite, and the field matter entanglement is reduced when the objects are far.
- Subjects :
- Physics
Quantum discord
010308 nuclear & particles physics
General Physics and Astronomy
Quantum Physics
Quantum entanglement
Squashed entanglement
01 natural sciences
Topological entropy in physics
Quantum relative entropy
Quantum electrodynamics
Quantum mechanics
0103 physical sciences
W state
010306 general physics
Amplitude damping channel
Joint quantum entropy
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 109
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....034b3cd38ad7519ee34096fb78a375a5