Scalable register initialization for quantum computing in an optical lattice

Abstract

The Mott insulator state created by loading an atomic Bose-Einstein condensate (BEC) into an optical lattice may be used as a means to prepare a register of atomic qubits in a quantum computer. Such architecture requires a lattice commensurately filled with atoms, which corresponds to the insulator state only in the limit of zero inter-well tunneling. We show that a lattice with spatial inhomogeneity created by a quadratic magnetic trapping potential can be used to isolate a subspace in the center which is impervious to hole-hoping. Components of the wavefunction with more than one atom in any well can be projected out by selective measurement on a molecular photo-associative transition. Maintaining the molecular coupling induces a quantum Zeno effect that can sustain a commensurately filled register for the duration of a quantum computation.

5 pages, 2 figures

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• Mott Domains of Bosons Confined on Optical Lattices
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Cited by in corpus (13)

• Observation of the Mott Insulator to Superfluid Crossover of a Driven-Dissipative Bose-Hubbard System
• Emergence of glass-like dynamics for dissipative and strongly interacting bosons
• Bragg Spectroscopy of ultracold atoms loaded in an optical lattice
• Two-time Correlations Probing the Dynamics of Dissipative Many-Body Quantum Systems: Aging and Fast Relaxation
• Homogeneous and inhomogeneous magnetic phases of constrained dipolar bosons
• The role of interactions, tunneling and harmonic confinement on the adiabatic loading of bosons in an optical lattice
• Effects of finite temperature on the Mott insulator state
• Fault-Tolerant Dissipative Preparation of Atomic Quantum Registers with Fermions
• Bose - Einstein Condensate Superfluid-Mott Insulator Transition in an Optical Lattice
• Dissipative quantum dynamics of fermions in optical lattices: a slave-spin approach
• Noise Correlations of Hard-core Bosons: Quantum Coherence and Symmetry Breaking
• Exact Solutions for Solitary Waves in a Bose-Einstein Condensate under the Action of a Four-Color Optical Lattice
• Hyperfine spectra of trapped Bosons in optical lattices