Quantum computing with magnetically interacting atoms
arXiv:quant-ph/0406117 · doi:10.1103/PhysRevA.70.062319
Abstract
We propose a scalable quantum-computing architecture based on cold atoms confined to sites of a tight optical lattice. The lattice is placed in a non-uniform magnetic field and the resulting Zeeman sublevels define qubit states. Microwave pulses tuned to space-dependent resonant frequencies are used for individual addressing. The atoms interact via magnetic-dipole interactions allowing implementation of a universal controlled-NOT gate. The resulting gate operation times for alkalis are on the order of milliseconds, much faster then the anticipated decoherence times. Single qubit operations take about 10 microseconds. Analysis of motional decoherence due to NOT operations is given. We also comment on the improved feasibility of the proposed architecture with complex open-shell atoms, such as Cr, Eu and metastable alkaline-earth atoms with larger magnetic moments.
fixed bibliography and eps figures
References in corpus (20)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- The Physical Implementation of Quantum Computation
- Decoherence Free Subspaces for Quantum Computation
- Fast quantum gates for neutral atoms
- Quantum computation with trapped polar molecules
- Noiseless Quantum Codes
- Conditional Quantum Dynamics and Logic Gates
- Entanglement of atoms via cold controlled collisions
- Ion-trap quantum logic using long-wavelength radiation
- Reducing decoherence in quantum computer memory with all quantum bits coupling to the same environment
- Defect-Suppressed Atomic Crystals in an Optical Lattice
- Efficient implementation of selective recoupling in heteronuclear spin systems using Hadamard matrices
- Magnetic trapping of metastable atomic strontium
- On the feasibility of cooling and trapping metastable alkaline-earth atoms
- Quantum entanglement using trapped atomic spins
- Optimizing the fast Rydberg quantum gate
- Efficient magneto-optical trapping of Yb atoms with a violet laser diode
- Determination of the s-wave Scattering Length of Chromium
- Quantum Logic for Trapped Atoms via Molecular Hyperfine Interactions
- Introduction to NMR Quantum Information Processing
Cited by in corpus (24)
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Colloquium: Physics of optical lattice clocks
- Trapping ultracold dysprosium: a highly magnetic gas for dipolar physics
- An ytterbium quantum gas microscope with narrow-line laser cooling
- Quantum Computing and Quantum Simulation with Group-II Atoms
- Dysprosium magneto-optical traps
- Dissipative Bose-Hubbard system with intrinsic two-body loss
- Controlling interactions between highly-magnetic atoms with Feshbach resonances
- Inelastic and elastic collision rates for triplet states of ultracold strontium
- Inelastic Collisions in Optically Trapped Ultracold Metastable Ytterbium
- Ultracold Heteronuclear Mixture of Ground and Excited State Atoms
- A scalable quantum computer with an ultranarrow optical transition of ultracold neutral atoms in an optical lattice
- State-dependent lattices for quantum computing with alkaline-earth-metal atoms
- Spin Dependent Collision of Ultracold Metastable Atoms
- Magnetically tunable Feshbach resonances in Li+Er
- p-Wave Optical Feshbach Resonances in Yb-171
- Entangling the lattice clock: Towards Heisenberg-limited timekeeping
- Spin-exchange collisions of submerged shell atoms below 1 Kelvin
- General classification of qubit encodings in ultracold diatomic molecules
- Controllable quantum spin glasses with magnetic impurities embedded in quantum solids
- Zeeman Relaxation of Cold Atomic Iron and Nickel in Collisions with 3He
- Investigation of ac-Stark shifts in excited states of dysprosium relevant to testing fundamental symmetries
- Quantum computing with magnetic atoms in optical lattices of reduced periodicity
- Cooling in reduced period optical lattices: non-zero Raman detuning