Generation of multiple power-balanced laser beams for quantum-state manipulation experiments with phase-stable double optical lattices

Petra, S.J.H.; Sjölund, Peder; Kastberg, Anders

doi:10.1088/1464-4258/8/5/003

Cited by 6 publications

(10 citation statements)

References 14 publications

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“…The latter is a closed transition, so the rate of optical pumping out of lattice B will be slow, while the former is an open transition, such that the probability of optical pumping from lattice A to lattice B is high. The relative spatial phase between the two lattices can be controlled accurately, along any direction in space, by changing the path lengths of the individual laser beams [30,31,32].…”

Section: Experimental Realisationmentioning

confidence: 99%

Controllable 3D atomic Brownian motor in optical lattices

Dion

Sjölund

Petra

et al. 2008

Eur. Phys. J. Spec. Top.

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Abstract. We study a Brownian motor, based on cold atoms in optical lattices, where atomic motion can be induced in a controlled manner in an arbitrary direction, by rectification of isotropic random fluctuations. In contrast with ratchet mechanisms, our Brownian motor operates in a potential that is spatially and temporally symmetric, in apparent contradiction to the Curie principle. Simulations, based on the Fokker-Planck equation, allow us to gain knowledge on the qualitative behaviour of our Brownian motor. Studies of Brownian motors, and in particular ones with unique control properties, are of fundamental interest because of the role they play in protein motors and their potential applications in nanotechnology. In particular, our system opens the way to the study of quantum Brownian motors.

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Section: Experimental Realisationmentioning

confidence: 99%

Controllable 3D atomic Brownian motor in optical lattices

Dion

Sjölund

Petra

et al. 2008

Eur. Phys. J. Spec. Top.

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“…The experimental apparatus has been described in detail elsewhere [23,24,27]. In brief, we start with a cloud of laser-cooled Cs atoms with a temperature of a few microkelvin.…”

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confidence: 99%

“…In order to create a double lattice (two overlapped OL's with the same spatial period and the same topography), two such sets are overlapped. When doing this, great care has to be taken to maintain phase stability and to avoid spurious drifts due to unbalanced radiation pressure [27]. In the double OL, we typically trap some 10 8 atoms, with a filling fraction of about 0.05 atoms per site.…”

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confidence: 99%

Demonstration of a Controllable Three-Dimensional Brownian Motor in Symmetric Potentials

et al. 2006

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We demonstrate a Brownian motor, based on cold atoms in optical lattices, where isotropic random fluctuations are rectified in order to induce controlled atomic motion in arbitrary directions. In contrast to earlier demonstrations of ratchet effects, our Brownian motor operates in potentials that are spatially and temporally symmetric, but where spatiotemporal symmetry is broken by a phase shift between the potentials and asymmetric transfer rates between them. The Brownian motor is demonstrated in three dimensions and the noise-induced drift is controllable in our system.

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“…Instead, there is a strong dimensional coupling. To get two optical lattices that are synchronously phase stable, and balanced in irradiance, requires an elaborate overlap of the sets of beams, as described in [30][31][32]. The selective phase shifts between the two lattices are accomplished either with electrooptical modulation, or by interferometric techniques (also described in the references above).…”

Section: Experimental Set-upmentioning

confidence: 99%

A three‐dimensional Brownian motor, realised with symmetric optical lattices

Kastberg

Dion

Hagman

et al. 2009

Physica Status Solidi (b)

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A three‐dimensional Brownian motor is realised using lasercooled caesium atoms trapped in a system of two static, and individually symmetric, optical lattices; a so‐called double optical lattice. Isotropic fluctuations, emanating from light scattering, are rectified, and the diffusion of the ensemble of atoms is biased, with a resulting constant velocity that is controllable both in direction and magnitude. The working principle of the Brownian motor can be seen as a pulsation between two different potentials, both symmetric but around different points. The correlation between interferometric spatial offsets, and imbalance in optical pumping rates, leads to a spatio‐temporal asymmetry sufficient for generating a controlled, directed motion (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Generation of multiple power-balanced laser beams for quantum-state manipulation experiments with phase-stable double optical lattices

Cited by 6 publications

References 14 publications

Controllable 3D atomic Brownian motor in optical lattices

Controllable 3D atomic Brownian motor in optical lattices

Demonstration of a Controllable Three-Dimensional Brownian Motor in Symmetric Potentials

A three‐dimensional Brownian motor, realised with symmetric optical lattices

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