Accurate Microwave Control and Real-Time Diagnostics of Neutral Atom Qubits
arXiv:0811.3634 · doi:10.1103/PhysRevA.79.022316
Abstract
We demonstrate accurate single-qubit control in an ensemble of atomic qubits trapped in an optical lattice. The qubits are driven with microwave radiation, and their dynamics tracked by optical probe polarimetry. Real-time diagnostics is crucial to minimize systematic errors and optimize the performance of single-qubit gates, leading to fidelities of 0.99 for single-qubit pi rotations. We show that increased robustness to large, deliberately introduced errors can be achieved through the use of composite rotations. However, during normal operation the combination of very small intrinsic errors and additional decoherence during the longer pulse sequences precludes any significant performance gain in our current experiment.
9 pages, 7 figures
References in corpus (21)
- Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance
- Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles
- Fast quantum gates for neutral atoms
- NMR Techniques for Quantum Control and Computation
- Experimental long-lived entanglement of two macroscopic objects
- Resonant nonlinear magneto-optical effects in atoms
- Entanglement of atoms via cold controlled collisions
- Controlled Collisions for Multiparticle Entanglement of Optically Trapped Atoms
- Quantum Logic Gates in Optical Lattices
- Controlled exchange interaction between pairs of neutral atoms in an optical lattice
- Universal Control of Decoupled Quantum Systems
- A neutral atom quantum register
- Tackling Systematic Errors in Quantum Logic Gates with Composite Rotations
- Resolved-sideband Raman cooling to the ground state of an optical lattice
- NMR-like control of a quantum bit superconducting circuit
- Error-resistant Single Qubit Gates with Trapped Ions
- Continuous Weak Measurement and Nonlinear Dynamics in a Cold Spin Ensemble
- High Fidelity Single Qubit Operations using Pulsed EPR
- Manipulation of Single Neutral Atoms in Optical Lattices
- A Continuous Non-demolition Measurement of the Cs Clock Transition Pseudo-spin
- Measuring the Quantum State of a Large Angular Momentum
Cited by in corpus (28)
- Robustness of composite pulses to time-dependent control noise
- Composite pulses for interferometry in a thermal cold atom cloud
- Microwave Control of Atomic Motion in Optical Lattices
- Randomized benchmarking of atomic qubits in an optical lattice
- Imprinting Patterns of Neutral Atoms in an Optical Lattice using Magnetic Resonance Techniques
- Field-sensitive addressing and control of field-insensitive neutral-atom qubits
- Control of inhomogeneous atomic ensembles of hyperfine qudits
- Ultrahigh-fidelity composite rotational quantum gates
- Multi-qubit compensation sequences
- Three-Axis Measurement and Cancellation of Background Magnetic Fields to less than 50 uG in a Cold Atom Experiment
- Designing Robust Unitary Gates: Application to Concatenated Composite Pulse
- High-fidelity quantum control by polychromatic pulse trains
- General Formalism for Evaluating the Impact of Phase Noise on Bloch Vector Rotations
- Narrowband and passband composite pulses for variable rotations
- Composite pulses with errant phases
- Universal Composite Pulses for Efficient Population Inversion with an Arbitrary Excitation Profile
- High-fidelity composite quantum gates for Raman qubits
- Nested composite NOT gates for quantum computation
- Inductively guided circuits for ultracold dressed atoms
- Ultrafast Rabi oscillation of a Gaussian atom ensemble
- Coherent control of atomic transport in spinor optical lattices
- Damping of local Rabi oscillations in the presence of thermal motion
- Ultrahigh-fidelity composite quantum phase gates
- Fundamental limit to Qubit Control with Coherent Field
- Reducing Collective Quantum State Rotation Errors with Reversible Dephasing
- Tuning quantum-classical correspondence of molecular systems in a cavity
- Ultrabroadband, ultranarrowband and ultrapassband composite polarisation half-wave plates, ultrabroadband composite polarisation pi-rotators and on the quantum-classical analogy
- Linear and continuous variable spin-wave processing using a cavity-coupled atomic ensemble