Diffraction-limited optics for single-atom manipulation

Sortais, Yvan R. P.; Marion, H.; Tuchendler, Charles; Lance, Andrew M.; Lamare, Michel; Fournet, Pierre; Armellin, C.; Mercier, Richard; Messin, Gaëtan; Browaeys, Antoine; Grangier, Philippe

doi:10.1103/physreva.75.013406

Cited by 102 publications

(99 citation statements)

References 23 publications

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“…Thus, it is instructive to show independently that the barrier penetrability for bosons increases due to symmetrization of the wave function. Before turning to this task, we note that this fact might be demonstrated experimentally by modern techniques, that allow the preparation of Bose condensates as well as single atoms in double well traps (see, e.g., [10,11,12,13]). To do this, an initial state of a single boson in one well and Bose condensate in the other well should be formed.…”

Section: Probability Of Stimulated α Decaymentioning

confidence: 99%

Possible Stimulation of NuclearαDecay by Superfluid Helium

Barabanov

2009

Phys. Rev. Lett.

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Section: Probability Of Stimulated α Decaymentioning

confidence: 99%

Possible Stimulation of NuclearαDecay by Superfluid Helium

Barabanov

2009

Phys. Rev. Lett.

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“…However, limited by the technology, it is difficult to make the focus small enough. At present, by using diffraction-limited optics based on the combination of a large numerical aperture aspheric lens (NA = 0.5) placed inside the vacuum chamber and a few standard lenses placed outside, a waist of w 0 = (1.03±0.01) μm at 850 nm and a radial oscillation frequency of ν r = (160±3) kHz with a trap depth U 0 = 2.8 mK have been obtained [28,58]. If stronger confinement is required and at the same time a lower red detuned potential depth is desired, a different method must be used.…”

Section: Combining Red and Blue Detuned Optical Potentials To Form A mentioning

confidence: 99%

“…It allows us to adjust the radial oscillation frequency continuously by changing the blue detuned potential depth. Furthermore, we can optimize our scheme by using a diffraction-limited optics as in [58].…”

Section: Experimental Demonstration For the Lamb-dicke Trapmentioning

confidence: 99%

Single atoms in the ring lattice for quantum information processing and quantum simulation

Shi

et al. 2012

Chin. Sci. Bull.

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We have demonstrated preparing and rotating single neutral rubidium atoms in an optical ring lattice generated by a spatial light modulator, inserting two atoms into a single microscopic optical potential efficiently by dynamically reshaping the optical dipole trap, trapping single atoms in a blue detuned optical bottle beam trap, and confining single atoms into the Lamb-Dicke regime by combining red and blue detuned optical potentials. In combination with the manipulation of internal states of single atoms, the study is opening a way for research in the field of quantum information processing and quantum simulation. In this paper we review the past works and discuss the prospects. laser cooling and trapping, single atoms, quantum information processing, quantum simulation Citation:Yu S, He X D, Xu P, et al. Single atoms in the ring lattice for quantum information processing and quantum simulation. Chin Sci Bull, 2012Bull, , 57: 1931 1945Bull, , doi: 10.1007 Single neutral atoms are promising candidates for quantum information processing [6,7]. A qubit can be encoded in the internal or motional states of an atom, and multi-qubit operations can be performed based on atom-light interactions or atom-atom interactions. In particular, the hyperfine ground states of alkali-metal atoms can be considered as qubits, which can be easily manipulated via microwave radiation or Raman transitions. Several kinds of proposals for quantum gate operation were designed based on dipoledipole interactions between Rydberg atoms [8], cavity-mediated photon exchange [9] and controlled collisions [10]. Furthermore, single atom array can serve as a research platform for physical models described in other systems that are not directly investigated experimentally. The few-body simulation offers an opportunity to understand some intriguing many-body phenomena, such as superconductivity in solid materials [11], and the natural process of photosynthesis [12]. Instead of being adiabatically transferred from ultracold atomic ensemble, in our experiment single atom array is built one by one based on "collisional blockade" mechanism [13,14] that locks the atom number either zero or one in ultra small dipole trap in the presence of near-resonant laser light. Here, we demonstrate trapping single neutral rubidium atoms in the ring lattice generated by a computer controlled spatial light modulator (SLM), and present several kinds of manipulations of single atom array.

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“…We trap lasercooled rubidium 87 atoms in a microscopic dipole trap produced by focusing a laser beam at 957 nm with a large-numerical-aperture aspheric lens, as described in Ref. [26]. The 1/e 2 radius of the gaussian spot is w = 1.6 µm.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

“…We find that the heating rate R(t), which amounts initially to R(0) = 22 s −1 , drops very rapidly and has very little influence on the evaporation. For the one-body loss rate, we plug in the simulation the value K 1 = 0.1 s −1 corresponding to the measured 10 s vacuum-limited lifetime of a single atom in the microscopic trap [26]. Also, we take for the three-body loss rate the value that we measured in a separate experiment, K 3 = 4 × 10 −29 cm 6 .s −1 [46].…”

Section: Evaporation Dynamicsmentioning

confidence: 99%

Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap

et al. 2013

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We demonstrate experimentally the evaporative cooling of a few hundred rubidium 87 atoms in a single-beam microscopic dipole trap. Starting from 800 atoms at a temperature of 125 µK, we produce an unpolarized sample of 40 atoms at 110 nK, within 3 s. The phase-space density at the end of the evaporation reaches unity, close to quantum degeneracy. The gain in phase-space density after evaporation is 10 3 . We find that the scaling laws used for much larger numbers of atoms are still valid despite the small number of atoms involved in the evaporative cooling process. We also compare our results to a simple kinetic model describing the evaporation process and find good agreement with the data.

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Diffraction-limited optics for single-atom manipulation

Cited by 102 publications

References 23 publications

Possible Stimulation of NuclearαDecay by Superfluid Helium

Possible Stimulation of NuclearαDecay by Superfluid Helium

Single atoms in the ring lattice for quantum information processing and quantum simulation

Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap

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