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Article overview
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One- and two-atom states in a rotating ring lattice | | Juha Javanainen
; Otim Odong
; Jerome C. Sanders
; | | Date: |
1 Mar 2012 | | Abstract: | We study the states of one and two atoms in a rotating ring lattice in a
Hubbard type tight-binding model. The model is developed carefully from basic
principles in order to properly identify the physical observables. The
one-particle ground state may be degenerate and represent a finite flow
velocity depending on the parity of the number of lattice sites, the sign of
the tunneling matrix element, and the rotation speed of the lattice. Variation
of the rotation speed may be used to control one-atom states, and leads to
peculiar behaviors such as wildly different phase and group velocities for an
atom. Adiabatic variation of the rotation speed of the lattice may also be used
to control the state of a two-atom lattice dimer. For instance, at a suitably
chosen rotation speed both atoms are confined to the same lattice site. | | Source: | arXiv, 1203.0246 | | Services: | Forum | Review | PDF | Favorites | |
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