Atomic states in optical traps near a planar surface

Messina, Riccardo; Pelisson, Sophie; Angonin, Marie-Christine; Wolf, Peter

doi:10.1103/physreva.83.052111

Cited by 11 publications

(15 citation statements)

References 47 publications

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“…As we have shown in a recent paper [5], these energy levels can be strongly modified by the proximity of a surface. This arises from the intrinsic modification of atomic wave functions due to the presence of a boundary condition and to the interaction between the atoms and the quantized electromagnetic field, known as Casimir-Polder interaction [6,7], in the presence of the surface.…”

Section: Introductionmentioning

confidence: 55%

“…[5], the resolution of the time-independent Schrödinger equation for H 0 leads to a class of states similar to the well-known Wannier-Stark states [10], with a modification due to the presence of the surface. These states, noted with ϕ m (z) (where m = 1,2, .…”

Section: Physical Systemmentioning

confidence: 94%

“…Let us consider a two-level atom trapped in a vertical optical standing wave in proximity of a planar surface as described in Ref. [5]. The Hamiltonian of such a system is given by (with the same notations as in Ref.…”

Section: Physical Systemmentioning

confidence: 99%

“…In an ideal periodic optical lattice, the additional linear gravitational potential leads to a class of localized atomic states in the trap, known as * sophie.pelisson@obspm.fr Wannier-Stark states [9,10]. As anticipated, these states and their energy levels are modified close to the surface [5]. An interferometric scheme is created by the way of a series of Raman pulses.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamical aspects of atom interferometry in an optical lattice in proximity to a surface

Pelisson¹,

Messina²,

Angonin³

et al. 2012

Phys. Rev. A

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The efficiency of an atomic interferometer in proximity of a surface is discussed. We first study which is the best choice of frequency for a pulse acting on internal atomic transitions in the same well. Then, considering the modification of atomic energy levels in vicinity of the surface, we propose the application of two simultaneous Raman lasers and numerically study the associated interference fringes. We show that the efficiency of the interferometric scheme is limited by the existence of a residual phase depending on the atomic path. We propose a symmetric scheme in order to avoid these contributions. We finally show that the suggested modifications make the contrast of the interference fringes close to 1 in any configuration, both close and far from the surface, and with one or more initially populated wells.

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Section: Introductionmentioning

confidence: 55%

Section: Physical Systemmentioning

confidence: 94%

Section: Physical Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamical aspects of atom interferometry in an optical lattice in proximity to a surface

Pelisson¹,

Messina²,

Angonin³

et al. 2012

Phys. Rev. A

Self Cite

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show abstract

“…The spread of the atomic wave function |W m depends on the lattice depth [43]. In the case of a shallow depth (U 0 < 5E r , where E r is the recoil energy defined by E r /h =hk 2 l /2m a = 2π × 8 kHz), the wave function can extend across a significant number of wells [43,44].…”

Section: Theoretical Simulationmentioning

confidence: 99%

Atomic multiwave interferometer in an optical lattice

et al. 2013

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A multiwave atom interferometer using multiple Wannier-Stark states is experimentally realized in a vertical optical lattice. Atoms are coherently driven by stimulated Raman transitions into a superposition of several adjacent lattice sites, in which they evolve at multiples of Bloch frequency in the same internal state to form an interference pattern. We observe coherent evolution for more than 500 Bloch periods. The noise analysis shows that the phase resolution of this interferometer is detection noise limited. This multiwave interferometer could be a potential instrument for gravimetry and short-range forces measurement.

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A trapped ultracold atom force sensor with a μm-scale spatial resolution

et al. 2018

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We report on the use of an ultracold ensemble of 87 Rb atoms trapped in a vertical lattice as a source for a quantum force sensor based on a Ramsey-Raman type interferometer. We reach spatial resolution in the low micrometer range in the vertical direction thanks to evaporative cooling down to ultracold temperatures in a crossed optical dipole trap. In this configuration, the coherence time of the atomic ensemble is degraded by inhomogeneous dephasing arising from atomic interactions. By weakening the confinement in the transverse direction only, we dilute the cloud and drastically reduce the strength of these interactions, without affecting the vertical resolution. This allows us to maintain an excellent relative sensitivity on the Bloch frequency, which is related to the local gravitational force, of 5×10 −6 at 1 s which integrates down to 8×10 −8 after one hour averaging time.

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Atomic states in optical traps near a planar surface

Cited by 11 publications

References 47 publications

Dynamical aspects of atom interferometry in an optical lattice in proximity to a surface

Dynamical aspects of atom interferometry in an optical lattice in proximity to a surface

Atomic multiwave interferometer in an optical lattice

A trapped ultracold atom force sensor with a μm-scale spatial resolution

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