Coherent control of ultracold {sup 85}Rb trap-loss collisions with nonlinearly frequency-chirped light

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063403· OSTI ID:21550126

Pechkis, J A ^[1]; Carini, J L; Rogers, III, C E; Gould, P L ^[1]; Kallush, S ^[2]; Kosloff, R ^[3]

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1. Department of Physics, University of Connecticut, Storrs, Connecticut 06269 (United States)
2. Department of Physics and Optical Engineering, ORT Braude, P.O. Box 78, Karmiel (Israel)
3. Department of Physical Chemistry and the Fritz Haber Research Center for Molecular Dynamics, Hebrew University, IL-91094 Jerusalem (Israel)

We present results on coherent control of ultracold trap-loss collisions using 40-ns pulses of nonlinearly frequency-chirped light. The chirps, either positive or negative, sweep {approx}1 GHz in 100 ns and are centered at various detunings below the D{sub 2} line of {sup 85}Rb. At each center detuning, we compare the collisional rate constant {beta} for chirps that are linear in time, concave-down, and concave-up. For positive chirps, we find that {beta} generally depends very little on the shape of the chirp. For negative chirps, however, we find that {beta} can be enhanced by up to 50(20)% for the case of the concave-down shape. This occurs at detunings where the evolution of the wave packet is expected to be coherent. An enhancement at these detunings is also seen in quantum-mechanical simulations of the collisional process.

• OSTI ID: 21550126
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.063403; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COLLISIONS
COMPARATIVE EVALUATIONS
CONTROL
GHZ RANGE
PULSES
QUANTUM MECHANICS
REACTION KINETICS
RUBIDIUM 85
SIMULATION
TRAPS
VISIBLE RADIATION
WAVE PACKETS
ELECTROMAGNETIC RADIATION
EVALUATION
FREQUENCY RANGE
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
MECHANICS
NANOSECONDS LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
RADIATIONS
RADIOISOTOPES
RUBIDIUM ISOTOPES
STABLE ISOTOPES