Dissipation and Decoherence in a Quantum Register

Details Dissipation and Decoherence in a Quantum Register Dissipation and Decoherence in a Quantum Register

1997-05-26

arxiv.org/abs/quant-ph/9705045v2

Phys.Rev.A57:3276,1998

Physics

Quantum Physics

minor corrections, references added, to appear in PRA (10 pages + 5 figures LaTeX)

Scientific paper

10.1103/PhysRevA.57.3276

A model for a quantum register $\cal R$ made of $N$ replicas of a $d$-dimensional quantum system (cell) coupled with the environment, is studied by means of a Born-Markov Master Equation (ME). Dissipation and decoherence are discussed in various cases in which a sub-decoherent enconding can be rigorously found. For the qubit case ($d=2$) we have solved, for small $N,$ the ME by numerical direct integration and studied, as a function of the coherence length $\xi_c$ of the bath, fidelity and decoherence rates of states of the register. For large enough $\xi_c$ the singlet states of the global $su(2)$ pseudo-spin algebra of the register (noiseless at $\xi_c=\infty$) are shown to have a much smaller decoherence rates than the rest of the Hilbert space.

Affiliated with

Also associated with

No associations

Rating

Dissipation and Decoherence in a Quantum Register 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 Dissipation and Decoherence in a Quantum Register, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dissipation and Decoherence in a Quantum Register will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-561059