Physics – Quantum Physics
Scientific paper
2012-04-13
Physics
Quantum Physics
15 pages, 12 figures
Scientific paper
We study the behaviour of the expectation value of the acceleration of a particle in a one-dimensional periodic potential when an external homogeneous force is suddenly applied. The theory is formulated in terms of modified Bloch states that include the interband mixing induced by the force. This approach allows us to understand the behaviour of the wavepacket, which responds with a mass that is initially the bare mass, and subsequently oscillates around the value predicted by the effective mass. If Zener tunneling can be neglected, the expression obtained for the acceleration of the particle is valid over timescales of the order of a Bloch oscillation, which are of interest for experiments with cold atoms in optical lattices. We discuss how these oscillations can be tuned in an optical lattice for experimental detection.
Duque-Gomez Federico
Sipe John E.
No associations
LandOfFree
Response of a particle in a one-dimensional lattice to an applied force: Dynamics of the effective mass 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 Response of a particle in a one-dimensional lattice to an applied force: Dynamics of the effective mass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Response of a particle in a one-dimensional lattice to an applied force: Dynamics of the effective mass will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-144531