Real-time control of the periodicity of a standing wave: an optical accordion

Li, T. C.; Kelkar, Hrishikesh; Medellín, David; Raizen, Mark G.

doi:10.1364/oe.16.005465

Cited by 41 publications

(64 citation statements)

References 17 publications

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“…Then, the potential landscape of each supercell is similar to the one considered in the present study. Such an experimental implementation may be achieved either by the use of holographic masks [53] or by the modulation of the wavenumber [54]. The interatomic repulsion can be tuned with the aid of a magnetic Feshbach resonance.…”

Section: Discussionmentioning

confidence: 99%

Quantum dynamical response of ultracold few-boson ensembles in finite optical lattices to multiple interaction quenches

2017

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The correlated non-equilibrium quantum dynamics following a multiple interaction quench protocol for few-bosonic ensembles confined in finite optical lattices is investigated. The quenches give rise to an interwell tunneling and excite the cradle and a breathing mode. Several tunneling pathways open during the time interval of increased interactions, while only a few occur when the system is quenched back to its original interaction strength. The cradle mode, however, persists during and in between the quenches, while the breathing mode possesses dinstinct frequencies. The occupation of excited bands is explored in detail revealing a monotonic behavior with increasing quench amplitude and a non-linear dependence on the duration of the application of the quenched interaction strength. Finally, a periodic population transfer between momenta for quenches of increasing interaction is observed, with a power-law frequency dependence on the quench amplitude. Our results open the possibility to dynamically manipulate various excited modes of the bosonic system.

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Section: Discussionmentioning

confidence: 99%

Quantum dynamical response of ultracold few-boson ensembles in finite optical lattices to multiple interaction quenches

2017

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“…Such a system may be implemented either by the use of holographic masks [45] or by the modulation of the wavenumber, e.g. using accordion lattices [46]. The trap frequency and the barrier height can be manipulated independently via the intensity of the lattice beams, and, finally, the interparticle interaction can be modulated via a magnetic Feshbach resonance.…”

Section: Discussionmentioning

confidence: 99%

Quench-induced resonant tunneling mechanisms of bosons in an optical lattice with harmonic confinement

2017

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The non-equilibrium dynamics of small boson ensembles in a one-dimensional optical lattice is explored upon a sudden quench of an additional harmonic trap from strong to weak confinement. We find that the competition between the initial localization and the repulsive interaction leads to a resonant response of the system for intermediate quench amplitudes, corresponding to avoided crossings in the many-body eigenspectrum with varying final trap frequency. In particular, we show that these avoided crossings can be utilized to prepare the system in a desired state. The dynamical response is shown to depend on both the interaction strength as well as the number of atoms manifesting the many-body nature of the tunneling dynamics.

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“…In this paper we will consider the case of p = 0. We realize an adjustable distance between the two rings by changing the standing wave periodicity in a controllable way [34]: Two beams which are passing through lens interfere with each other at the focal plane and create interference pattern; the periodicity of the obtained lattice is inversely proportional to the distance between the two beams. The set-up is depicted in the Fig.…”

Section: Bosonic Atoms Loaded In Two-rings Optical Potential Withmentioning

confidence: 99%

Effective dynamics of cold atoms flowing in two ring-shaped optical potentials with tunable tunneling

2013

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We study the current dynamics of coupled atomic condensates flowing in two ring-shaped optical potentials. We provide a specific setup where the ring-ring coupling can be tuned in experimentally feasible way. It is demonstrated that the imaginary time effective action of the system in a weak coupling regime provides a twolevel-system-dynamics for the phase slip across the two rings. Through two-mode Gross-Pitaevskii mean field equations, the real time dynamics of the population imbalance and the phase difference between of the two condensates is thoroughly analyzed analytically, as function of the relevant physical parameters of the system. In particular, we find that the macroscopic quantum self trapping phenomenon is induced in the system if the flowing currents assume a non vanishing difference.

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Real-time control of the periodicity of a standing wave: an optical accordion

Cited by 41 publications

References 17 publications

Quantum dynamical response of ultracold few-boson ensembles in finite optical lattices to multiple interaction quenches

Quantum dynamical response of ultracold few-boson ensembles in finite optical lattices to multiple interaction quenches

Quench-induced resonant tunneling mechanisms of bosons in an optical lattice with harmonic confinement

Effective dynamics of cold atoms flowing in two ring-shaped optical potentials with tunable tunneling

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