Single-Atom Trapping in Holographic 2D Arrays of Microtraps with Arbitrary Geometries

We demonstrate single-atom trapping in two-dimensional arrays of microtraps with arbitrary geometries. We generate the arrays using a Spatial Light Modulator (SLM), with which we imprint an appropriate phase pattern on an optical dipole trap beam prior to focusing. We trap single $^{87}{\rm Rb}$ atoms in the sites of arrays containing up to $\sim100$ microtraps separated by distances as small as $3\;\mu$m, with complex structures such as triangular, honeycomb or kagome lattices. Using a closed-loop optimization of the uniformity of the trap depths ensures that all trapping sites are equivalent. This versatile system opens appealing applications in quantum information processing and quantum simulation, e.g. for simulating frustrated quantum magnetism using Rydberg atoms.

[1]  M. Saffman,et al.  Two-dimensional lattice of blue-detuned atom traps using a projected Gaussian beam array , 2013, 1305.6102.

[2]  Bertram Achtner,et al.  Handbook of Optical Systems: Volume 4: Survey of Optical Instruments , 2008 .

[3]  D. Weiss,et al.  Imaging single atoms in a three dimensional array , 2007 .

[4]  M D Barrett,et al.  All-optical formation of an atomic Bose-Einstein condensate. , 2001, Physical review letters.

[5]  Markus Greiner,et al.  A quantum gas microscope for detecting single atoms in a Hubbard-regime optical lattice , 2009, Nature.

[6]  Jordi Andilla,et al.  Correction of aberration in holographic optical tweezers using a Shack-Hartmann sensor. , 2009, Applied optics.

[7]  Z. Dutton,et al.  Dynamic high-speed spatial manipulation of cold atoms using acousto-optic and spatial light modulation. , 2007, Optics express.

[8]  M. Mudrich,et al.  Very long storage times and evaporative cooling of cesium atoms in a quasielectrostatic dipole trap , 2000, physics/0003075.

[9]  Igor Protsenko,et al.  Sub-poissonian loading of single atoms in a microscopic dipole trap , 2001, Nature.

[10]  Malte Schlosser,et al.  Scalable architecture for quantum information processing with atoms in optical micro-structures , 2011, Quantum Inf. Process..

[11]  Alexander L. Gaunt,et al.  Robust Digital Holography For Ultracold Atom Trapping , 2011, Scientific Reports.

[12]  M. McGovern,et al.  Near-deterministic preparation of a single atom in an optical microtrap , 2010 .

[13]  S. Ravets,et al.  Demonstration of a strong Rydberg blockade in three-atom systems with anisotropic interactions. , 2014, Physical review letters.

[14]  P. Zoller,et al.  Mesoscopic Rydberg gate based on electromagnetically induced transparency. , 2008, Physical review letters.

[15]  C. Regal,et al.  Cooling a Single Atom in an Optical Tweezer to Its Quantum Ground State , 2012, 1209.2087.

[16]  I. Bloch.  Ultracold quantum gases in optical lattices , 2005 .

[17]  S. Ravets,et al.  Direct measurement of the van der Waals interaction between two Rydberg atoms. , 2014, Physical review letters.

[18]  M. Saffman,et al.  Observation of Rydberg blockade between two atoms , 2008, 0805.0758.

[19]  C. M. Chandrashekar,et al.  Dynamic optical trap generation using FLC SLMs for the manipulation of cold atoms , 2004 .

[20]  Alexander L. Gaunt,et al.  Bose-Einstein condensation of atoms in a uniform potential. , 2012, Physical review letters.

[21]  A. Lance,et al.  Diffraction limited optics for single atom manipulation , 2006, quant-ph/0610071.

[22]  W. Ertmer,et al.  Micro-optical realization of arrays of selectively addressable dipole traps: a scalable configuration for quantum computation with atomic qubits. , 2001, Physical review letters.

[23]  D. Comparat,et al.  Observation of collective excitation of two individual atoms in the Rydberg blockade regime , 2008, 0810.2960.

[24]  A. Aspect,et al.  Direct observation of Anderson localization of matter waves in a controlled disorder , 2008, Nature.

[25]  M. Lewenstein,et al.  Ultracold atoms in optical lattices , 2012 .

[26]  P. Grangier,et al.  Two-dimensional transport and transfer of a single atomic qubit in optical tweezers , 2007, 0705.0312.

[27]  Characterizing single atom optical dipole traps , 2012 .

[28]  Zhihao Lan,et al.  Quantum simulations with ultracold quantum gases , 2012 .

[29]  Bose–Einstein condensation in a CO2-laser optical dipole trap , 2003, cond-mat/0312439.

[30]  J D Thompson,et al.  Coherence and Raman sideband cooling of a single atom in an optical tweezer. , 2012, Physical review letters.

[31]  R. Gerchberg.  A practical algorithm for the determination of phase from image and diffraction plane pictures , 1972 .

[32]  Thomas G. Walker,et al.  Quantum information with Rydberg atoms , 2009, 0909.4777.

[33]  C. Kurtsiefer,et al.  Strong interaction between light and a single trapped atom without a cavity , 2008, 2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science.

[34]  C. MacCormick,et al.  Experimental demonstration of painting arbitrary and dynamic potentials for Bose–Einstein condensates , 2009, 0902.2171.

[35]  M. Saffman,et al.  Atomic Fock state preparation using Rydberg blockade. , 2013, Physical review letters.