Dynamical localization of ultracold sodium atoms.
نویسندگان
چکیده
We report a study of atomic motion in time-dependent optical potentials. We measure momentum transfer in parameter regimes for which the classical dynamics are chaotic, and observe the quantum suppression of chaos by dynamical localization. The high degree of control over the experimental parameters enables detailed comparisons with theoretical predictions, and opens new avenues for investigating quantum chaos.
منابع مشابه
A Bose-Einstein Condensate Driven by a Kicked Rotor in a Finite Box
– We study the effect of different heating rates of a dilute Bose gas confined in a quasi-1D finite, leaky box. An optical kicked-rotor is used to transfer energy to the atoms while two repulsive optical beams are used to confine the atoms. The average energy of the atoms is localized after a large number of kicks and the system reaches a nonequilibrium steady state. A numerical simulation of t...
متن کاملUltracold atoms in optical lattices: tunable quantum many-body systems
Cold atoms in optical lattices offer an exciting new laboratory where quantum many-body phenomena can be realized in a highly controlled way. They can even serve as quantum simulators for notoriously difficult problems like high-temperature superconductivity. This review is focussed on the recent developments and new results in multi-component systems. Fermionic atoms with SU(N) symmetry have e...
متن کاملExperimental Study of Quantum Chaos with Cold Atoms
The hallmark of classical chaos in the motion of an ensemble of particles is diffusive growth in momentum and position. A system of quantum particles, in contrast, was predicted by Casati et al. to diffuse in phase space only for a limited time, following the classical prediction [1]. The diffusion is predicted to cease after the “quantum break time” due to quantum interference, and the momentu...
متن کاملFrequency shifts of photoassociative spectra of ultracold metastable Helium atoms : a new measurement of the s-wave scattering length
– We observe light-induced frequency shifts in one-color photoassociative spectra of magnetically trapped He atoms in the metastable 2S1 state. A pair of ultracold spinpolarized 2S1 helium atoms is excited into a molecular bound state in the purely long range 0+u potential connected to the 2 S1−2 P0 asymptote. The shift arises from the optical coupling of the molecular excited bound state with ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
دوره 60 4 Pt A شماره
صفحات -
تاریخ انتشار 1999