Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices

Details Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices

2003-12-17

arxiv.org/abs/cond-mat/0312417v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

We study inter-well coherent quantum tunneling of Bose-Einstein condensates (BEC's) in optical lattices. Irrespective of whether the BEC is a superfluid in the whole lattice, it may or may not be a superfluid within each well of the lattice depending on whether the ratio of the well kinetic energy to the interaction energy is small or large. When the bosons in each well are superfluid, we have Josephson tunneling among the wells driven by the phase difference between the superfluids in the different wells. For typical lattice parameters the Josephson tunneling rate will be somewhat enhanced from the naive estimate of (tunneling energy scale)$/\hbar$. Whether it is enhanced or not will depend on lattice parameters, but it can never be zero. When the bosons in each well are not superfluid, there is coherent quantum tunneling of essentially free bosons between the wells. This tunneling is proportional to the boson number difference between the wells.

Affiliated with

Also associated with

No associations

Rating

Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices 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 Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent Quantum Tunneling of Bose-Einstein Condensates in Optical Lattices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-592051