Entanglement transformation at absorbing and amplifying four-port devices

Details Entanglement transformation at absorbing and amplifying four-port devices Entanglement transformation at absorbing and amplifying four-port devices

2000-04-02

arxiv.org/abs/quant-ph/0004003v3

Phys. Rev. A 62, 043803 (2000)

Physics

Quantum Physics

12 pages, revtex, 10 eps figures, minor corrections in Appendix

Scientific paper

10.1103/PhysRevA.62.043803

Dielectric four-port devices play an important role in optical quantum information processing. Since for causality reasons the permittivity is a complex function of frequency, dielectrics are typical examples of noisy quantum channels, which cannot preserve quantum coherence. To study the effects of quantum decoherence, we start from the quantized electromagnetic field in an arbitrary Kramers--Kronig dielectric of given complex permittivity and construct the transformation relating the output quantum state to the input quantum state, without placing restrictions on the frequency. We apply the formalism to some typical examples in quantum communication. In particular we show that for entangled qubits the Bell-basis states $|\Psi^\pm>$ are more robust against decoherence than the states $|\Phi^\pm>$.

Affiliated with

Also associated with

No associations

Rating

Entanglement transformation at absorbing and amplifying four-port devices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Entanglement transformation at absorbing and amplifying four-port devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entanglement transformation at absorbing and amplifying four-port devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-579918