Bulletin of the American Physical Society
2006 37th Meeting of the Division of Atomic, Molecular and Optical Physics
Tuesday–Saturday, May 16–20, 2006; Knoxville, TN
Session E1: Scalable Solutions for Quantum Computing with Atoms and Ions |
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Chair: Brian DeMarco, University of Illinois at Urbana-Champaign Room: Knoxville Convention Center Lecture Hall |
Wednesday, May 17, 2006 1:30PM - 2:06PM |
E1.00001: Ion traps, quantum computing, and the measurement problem$^{\dag}$ Invited Speaker: The basic requirements for quantum computing and quantum simulation (single- and multi-qubit gates, long memory times, etc.) have been demonstrated in separate experiments on trapped ions. Construction of a useful information processor will require synthesis of these elements and implementation of high- fidelity operations on a very large number of qubits. NIST and other groups are addressing this scaling issue by trying to fabricate multi-zone arrays of traps that would allow highly- parallel processing. As the number of qubits increases, the measurement problem in quantum mechanics becomes more glaring; with luck, trapped ion systems might be able to shed light on this fundamental issue.\\ \\ $\dag$ Recent NIST work in collaboration with D. Leibfried, J. C. Bergquist, R. B. Blakestad, J. J. Bollinger, J. Britton, J. Chiaverini, R. E. Drullinger, R. Epstein, D. Hume, W. M. Itano, J. D. Jost, J. Koelemeij, E. Knill, C. Langer, R. Ozeri, R. Reichle, T. Rosenband, P. O. Schmidt, S. Seidelin, N. Shiga, and J. Wesenberg, and supported by DTO, ONR, and NIST. [Preview Abstract] |
Wednesday, May 17, 2006 2:06PM - 2:42PM |
E1.00002: Scaling Up Ion and Atom Traps with Silicon Based VLSI and MEMS Technologies Invited Speaker: Quantum computers, quantum simulators, and quantum repeaters require thousands or even millions of physical qubits in order to reach the performance levels required for interesting applications where the quantum information processing exceeds classical capabilities. Recently developed silicon VLSI and MEMS fabrication techniques are described that can achieve this scaling from the present levels of a few qubits for both ions and atoms. Ion traps are being fabricated using patterned metal electrodes isolated by SiO$_{2}$ and SiN on doped silicon substrates. The electrodes are in planar configurations so that CMOS electronics can be integrated below each electrode. The CMOS electronics can switch the required voltage sequences to each electrode for ion transport throughout the spatially multiplexed array of planar traps. Ion trap densities near 1000 ions/cm$^{2}$ are possible with these techniques. Atom traps can be formed holographically by Spatial Light Modulators based on MEMS mirror arrays. These optical traps can be rapidly re-configured in arbitrary 2D patterns in order to accomplish the scalable entanglement between trapped atoms required for cluster state quantum computation. Present technology should allow forming tens of thousands of traps over fields 500 $\mu $m on a side. [Preview Abstract] |
Wednesday, May 17, 2006 2:42PM - 3:18PM |
E1.00003: A double well lattice for dynamically manipulating pairs of cold atoms Invited Speaker: We describe the design and implementation of a 2D optical lattice of double wells suitable for isolating and manipulating an array of individual pairs of atoms in an optical lattice. Atoms in the square lattice can be placed in a double well with any of their four nearest neighbors. The properties of the double well (the barrier height and the energy offset of the paired sites) can be dynamically controlled. We demonstrate the dynamic control of the lattice by showing the coherent splitting of atoms from single wells into double wells and observing the resulting double-slit atom diffraction pattern. We also demonstrate efficient transfer of atoms between adjacent sites of the lattice as well as between different energy bands. This lattice can be used to test controlled neutral atom motion among lattice sites and should allow for testing controlled two-qubit gates. We propose a scheme and present progress towards performing a two-qubit gate. [Preview Abstract] |
Wednesday, May 17, 2006 3:18PM - 3:54PM |
E1.00004: Fidelity and Scalability in Trapped Ion Quantum Computing Invited Speaker: |
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