Tunnelinginduced angular momentum for single cold atoms
Abstract
We study the generation of angular momentum carrying states for a single cold particle by breaking the symmetry of a spatial adiabatic passage process in a twodimensional system consisting of three harmonic potential wells. By following a superposition of two eigenstates of the system, a single cold particle is completely transferred to the degenerate first excited states of the final trap, which are resonantly coupled via tunneling to the ground states of the initial and middle traps. Depending on the total time of the process, angular momentum is generated in the final trap, with values that oscillate between ±ℏ. This process is discussed in terms of the asymptotic eigenstates of the individual wells and the results are checked by simulations of the full twodimensional Schrödinger equation.
 Publication:

Physical Review A
 Pub Date:
 January 2014
 DOI:
 10.1103/PhysRevA.89.013626
 arXiv:
 arXiv:1401.0657
 Bibcode:
 2014PhRvA..89a3626M
 Keywords:

 03.75.Lm;
 03.75.Be;
 42.50.Dv;
 Tunneling Josephson effect BoseEinstein condensates in periodic potentials solitons vortices and topological excitations;
 Atom and neutron optics;
 Nonclassical states of the electromagnetic field including entangled photon states;
 quantum state engineering and measurements;
 Quantum Physics;
 Condensed Matter  Quantum Gases;
 Physics  Atomic Physics
 EPrint:
 6 pages, 5 figures