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This article is cited in 2 scientific papers (total in 2 papers)
Physics of ultra cold atoms and their applications
On the possibility of observing chaotic motion of cold atoms in rigid optical lattices
S. V. Prants, L. E. Kon'kov V. I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of RAS, Vladivostok
Abstract:
The possibility of experimental observation of chaotic motion of cold atoms in a one-dimensional rigid optical lattice without any modulation of its parameters and additional impact is demonstrated theoretically and numerically. This effect of deterministic chaos arises near the optical resonance due to the nonlinear coupling of electronic and mechanical degrees of freedom in the atom. In a certain range of resonance detunings, at each crossing of the lattice-forming standing wave node by the atom, the atomic dipole moment changes pseudorandomly in a step-like manner, accompanied by an appropriate change in the atom momentum. This leads to the effect of chaotic wandering of atoms, possessing the properties of the classical deterministic chaos, namely, to the exponential sensitivity of atomic trajectories to small variations of the initial conditions and/or the control parameters. With time, part of atoms from the initial cloud changes the direction of their motion to the opposite one, which can be detected in a real experiment. Numerical experiments with lithium atoms with the spontaneous emission taken into account show that by varying the laser radiation intensity (normalised detuning of resonance) in the rigid optical lattice, one can implement the transition from the regular regime of the atomic motion to the chaotic wandering in a real experiment.
Keywords:
cold atoms, rigid optical lattices, chaotic wandering.
Received: 09.03.2017 Revised: 18.04.2017
Citation:
S. V. Prants, L. E. Kon'kov, “On the possibility of observing chaotic motion of cold atoms in rigid optical lattices”, Kvantovaya Elektronika, 47:5 (2017), 446–450 [Quantum Electron., 47:5 (2017), 446–450]
Linking options:
https://www.mathnet.ru/eng/qe16617 https://www.mathnet.ru/eng/qe/v47/i5/p446
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