Physics – Quantum Physics
Scientific paper
2002-10-28
Phys. Rev. Lett., 91, 147903 (2003)
Physics
Quantum Physics
6 pages, 2 figures,with some reservations. Accepted for publication in Phys. Rev .Lett
Scientific paper
10.1103/PhysRevLett.91.147903
For the two-mode exciton system formed by the quasi-spin wave collective excitation of many $\Lambda$ atoms fixed at the lattice sites of a crystal, we discover a dynamic symmetry depicted by the semi-direct product algebra $SU(2)\bar{\otimes} h_2 $ in the large $N$ limit with low excitations. With the help of the spectral generating algebra method, we obtain a larger class of exact zero-eigenvalue states adiabatically interpolating between the initial state of photon-type and the final state of quasi-spin wave exciton-type. The conditions for the adiabatic passage of dark states are shown to be valid, even with the presence of the level degeneracy. These theoretical results can lead to propose new protocol of implementing quantum memory robust against quantum decoherence.
Li Yadong
liu Xian-Feng
Sun Chang-Pu
No associations
LandOfFree
Quasi-spin wave quantum memories with dynamic symmetry 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 Quasi-spin wave quantum memories with dynamic symmetry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasi-spin wave quantum memories with dynamic symmetry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-49968