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

Journal Article · Wed Jun 15 04:00:00 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, Journal Name: Physical Review. A Journal Issue: 6 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

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