Anomalous Bloch oscillations in one-dimensional parity-breaking periodic potentials

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.013619· OSTI ID:21537030

Pettini, Giulio ^[1]; Modugno, Michele ^[2]

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1. Dipartimento di Fisica e Astronomia, Universita di Firenze, and Istituto Nazionale di Fisica Nucleare, I-50019 Sesto Fiorentino (Italy)
2. Department of Theoretical Physics and History of Science, Universidad del Pais Vasco-Euskal Herriko Unibertsitateko, E-48080 Bilbao (Spain)

We investigate the dynamics of a wave packet in a parity-breaking one-dimensional periodic potential slowly varied in time and perturbed by a linear potential. Parity is broken by considering an asymmetric double well per unit cell. By comparing the prediction of the semiclassical dynamics with the full Schroedinger solution, we show that Bloch oscillations are strongly affected by anomalous velocity corrections related to Berry's phase. We characterize how these effects depend on the degree of parity breaking of the potential and on the modulation parameters. We also discuss how to measure the effects of the anomalous velocity in current experiments with noninteracting Bose-Einstein condensates in bichromatic optical lattices, under the effect of gravity.

• OSTI ID: 21537030
• Journal Information: Physical Review. A, Vol. 83, Issue 1; Other Information: DOI: 10.1103/PhysRevA.83.013619; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
BOSE-EINSTEIN CONDENSATION
CORRECTIONS
GRAVITATION
MATHEMATICAL SOLUTIONS
MODULATION
ONE-DIMENSIONAL CALCULATIONS
OSCILLATIONS
PARITY
PERIODICITY
POTENTIALS
SEMICLASSICAL APPROXIMATION
WAVE PACKETS
APPROXIMATIONS
CALCULATION METHODS
PARTICLE PROPERTIES
VARIATIONS