An efficient scheme for numerical simulations of the spin-bath decoherence

Details An efficient scheme for numerical simulations of the spin-bath decoherence An efficient scheme for numerical simulations of the spin-bath decoherence

2003-01-23

arxiv.org/abs/quant-ph/0301130v1

Physics

Quantum Physics

8 pages (RevTeX), 3 EPS figures

Scientific paper

10.1103/PhysRevE.67.056702

We demonstrate that the Chebyshev expansion method is a very efficient numerical tool for studying spin-bath decoherence of quantum systems. We consider two typical problems arising in studying decoherence of quantum systems consisting of few coupled spins: (i) determining the pointer states of the system, and (ii) determining the temporal decay of quantum oscillations. As our results demonstrate, for determining the pointer states, the Chebyshev-based scheme is at least a factor of 8 faster than existing algorithms based on the Suzuki-Trotter decomposition. For the problems of second type, the Chebyshev-based approach has been 3--4 times faster than the Suzuki-Trotter-based schemes. This conclusion holds qualitatively for a wide spectrum of systems, with different spin baths and different Hamiltonians.

Affiliated with

Also associated with

No associations

Rating

An efficient scheme for numerical simulations of the spin-bath decoherence 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 An efficient scheme for numerical simulations of the spin-bath decoherence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An efficient scheme for numerical simulations of the spin-bath decoherence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-74552