Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053608· OSTI ID:21528688

Deuretzbacher, F; Gebreyesus, G; Santos, L ^[1]; Topic, O; Scherer, M; Luecke, B; Ertmer, W; Klempt, C ^[2]; Arlt, J ^[3]

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1. Institut fuer Theoretische Physik, Leibniz Universitaet Hannover, Appelstr. 2, D-30167, Hannover (Germany)
2. Institut fuer Quantenoptik, Leibniz Universitaet Hannover, Welfengarten 1, D-30167 Hannover (Germany)
3. QUANTOP, Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark)

Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions, although typically very weak in alkali-metal atoms, are shown to play a very relevant role in the amplification process. We show that these interactions may lead to a strong dependence of the amplification dynamics on the angle between the trap axis and the magnetic-field orientation. We analyze as well the important role played by magnetic-field gradients, which also modify strongly the amplification process. Magnetic-field gradients, hence, must be carefully controlled in future experiments, in order to observe clearly the effects of the dipolar interactions in the amplification dynamics.

• OSTI ID: 21528688
• Journal Information: Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.053608; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METALS
AMPLIFICATION
ATOMS
BOSE-EINSTEIN CONDENSATION
COLLISIONS
DIPOLES
INTERACTIONS
MAGNETIC DIPOLES
MAGNETIC FIELDS
SPIN
SPINORS
ANGULAR MOMENTUM
ELEMENTS
METALS
MULTIPOLES
PARTICLE PROPERTIES