Geometric nature of the environment-induced Berry phase and geometric dephasing

Details Geometric nature of the environment-induced Berry phase and geometric dephasing Geometric nature of the environment-induced Berry phase and geometric dephasing

2004-05-12

arxiv.org/abs/cond-mat/0405267v2

Phys. Rev. Lett. 94, 070407 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

new version : more discussion and less technicalities (4pages 2fig)

Scientific paper

10.1103/PhysRevLett.94.070407

We investigate the geometric phase or Berry phase (BP) acquired by a spin-half which is both subject to a slowly varying magnetic field and weakly-coupled to a dissipative environment (either quantum or classical). We study how this phase is modified by the environment and find that the modification is of a geometric nature. While the original BP (for an isolated system) is the flux of a monopole-field through the loop traversed by the magnetic field, the environment-induced modification of the BP is the flux of a quadrupole-like field. We find that the environment-induced phase is complex, and its imaginary part is a geometric contribution to dephasing. Its sign depends on the direction of the loop. Unlike the BP, this geometric dephasing is gauge invariant for open paths of the magnetic field.

Affiliated with

Also associated with

No associations

Rating

Geometric nature of the environment-induced Berry phase and geometric dephasing 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 Geometric nature of the environment-induced Berry phase and geometric dephasing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geometric nature of the environment-induced Berry phase and geometric dephasing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-536438