Quantum gate in the decoherence-free subspace of trapped ion qubits
arXiv:0909.5397 · doi:10.1209/0295-5075/92/30006
Abstract
We propose a geometric phase gate in a decoherence-free subspace with trapped ions. The quantum information is encoded in the Zeeman sublevels of the ground-state and two physical qubits to make up one logical qubit with ultra long coherence time. Single- and two-qubit operations together with the transport and splitting of linear ion crystals allow for a robust and decoherence-free scalable quantum processor. For the ease of the phase gate realization we employ one Raman laser field on four ions simultaneously, i.e. no tight focus for addressing. The decoherence-free subspace is left neither during gate operations nor during the transport of quantum information.
arXiv comment6 pages, 6 figures
References in corpus (33)
- Elementary gates for quantum computation
- Persistent entanglement in arrays of interacting particles
- Decoherence Free Subspaces for Quantum Computation
- Experimental issues in coherent quantum-state manipulation of trapped atomic ions
- Experimental One-Way Quantum Computing
- Quantum computing with trapped ions
- Controlled Collisions for Multiparticle Entanglement of Optically Trapped Atoms
- Quantum dynamics of cold trapped ions, with application to quantum computation
- Heating of trapped ions from the quantum ground state
- Towards fault-tolerant quantum computing with trapped ions
- Long-lived qubit memory using atomic ions
- Universal Fault-Tolerant Computation on Decoherence-Free Subspaces
- Optimal control theory for unitary transformations
- Phase Control of Trapped Ion Quantum Gates
- Large Scale Quantum Computation in an Anharmonic Linear Ion Trap
- Coherence of qubits based on single Ca ions
- Spin-dependent forces on trapped ions for phase-stable quantum gates and motional Schrodinger-cat states
- Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor
- Ion trap quantum gates with amplitude-modulated laser beams
- Realization and characterization of a 2-photon 4-qubit linear cluster state
- Robust entanglement
- Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams
- Realization of Universal Ion Trap Quantum Computation with Decoherence Free Qubits
- Experimental quantum information processing with 43Ca+ ions
- Laserless trapped-ion quantum simulations without spontaneous scattering using microtrap arrays
- Sideband cooling and coherent dynamics in a microchip multi-segmented ion trap
- A scalable, high-speed measurement-based quantum computer using trapped ions
- Two-dimensional cluster-state preparation with linear ion traps
- Long-lived mesoscopic entanglement outside the Lamb-Dicke regime
- Coherent Manipulation of a Ca Spin Qubit in a Micro Ion Trap
- Geometric phase gate on an optical transition for ion trap quantum computation
- Universal quantum computation in decoherence-free subspaces with hot trapped-ions
- High-fidelity ion-trap quantum computing with hyperfine clock states