Quantum Logic for Trapped Atoms via Molecular Hyperfine Interactions

Abstract

We study the deterministic entanglement of a pair of neutral atoms trapped in an optical lattice by coupling to excited-state molecular hyperfine potentials. Information can be encoded in the ground-state hyperfine levels and processed by bringing atoms together pair-wise to perform quantum logical operations through induced electric dipole-dipole interactions. The possibility of executing both diagonal and exchange type entangling gates is demonstrated for two three-level atoms and a figure of merit is derived for the fidelity of entanglement. The fidelity for executing a CPHASE gate is calculated for two 87Rb atoms, including hyperfine structure and finite atomic localization. The main source of decoherence is spontaneous emission, which can be minimized for interaction times fast compared to the scattering rate and for sufficiently separated atomic wavepackets. Additionally, coherent couplings to states outside the logical basis can be constrained by the state dependent trapping potential.

Submitted to Physical Review A

References in corpus (2)

• Superchemistry: dynamics of coupled atomic and molecular Bose-Einstein condensates
• Atom Optics with Microfabricated Optical Elements

Cited by in corpus (24)

• A toolbox for lattice spin models with polar molecules
• Quantum phases of dipolar bosons in optical lattices
• Roton-maxon spectrum and stability of trapped dipolar condensates
• Coherent transport of neutral atoms in spin-dependent optical lattice potentials
• Creation of a dipolar superfluid in optical lattices
• Quantum Information Processing in Optical Lattices and Magnetic Microtraps
• Criteria for Exact Qudit Universality
• Entangling strings of neutral atoms in 1D atomic pipeline structures
• Ground-state properties of a one-dimensional system of dipoles
• Designing spin-1 lattice models using polar molecules
• Optimizing the fast Rydberg quantum gate
• Quantum State Control via Trap-induced Shape Resonance in Ultracold Atomic Collisions
• Ensemble Quantum Computation with atoms in periodic potentials
• Pseudo-potential treatment of two aligned dipoles under external harmonic confinement
• Ground state cooling of atoms in optical lattices
• Efficient and robust initialization of a qubit register with fermionic atoms
• Quantum computing with magnetically interacting atoms
• S-wave quantum entanglement in a harmonic trap
• On Non-Relativistic Conformal Field Theory and Trapped Atoms: Virial Theorems and the State-Operator Correspondence in Three Dimensions
• Cooling toolbox for atoms in optical lattices
• Delocalized Entanglement of Atoms in optical Lattices
• Limits on entanglement in rotationally-invariant scattering of spin systems
• Entangling identical bosons in optical tweezers via exchange interaction
• Encoding a qubit into multilevel subspaces