Fast gates for ion traps by splitting laser pulses

Abstract

We present a fast phase gate scheme that is experimentally achievable and has an operation time more than two orders of magnitude faster than current experimental schemes for low numbers of pulses. The gate time improves with the number of pulses following an inverse power law. Unlike implemented schemes which excite precise motional sidebands, thus limiting the gate timescale, our scheme excites multiple motional states using discrete ultra-fast pulses. We use beam-splitters to divide pulses into smaller components to overcome limitations due to the finite laser pulse repetition rate. This provides gate times faster than proposed theoretical schemes when we optimise a practical setup.

20 pages, 8 figures

References in corpus (9)

• Scalable multi-particle entanglement of trapped ions
• Quantum computing with trapped ions
• An Open-System Quantum Simulator with Trapped Ions
• 14-qubit entanglement: creation and coherence
• Quantum Teleportation Between Distant Matter Qubits
• Towards fault-tolerant quantum computing with trapped ions
• Fast and robust two-qubit gates for scalable ion trap quantum computing
• Deterministic entanglement of ions in thermal states of motion
• Coherent control of trapped ions using off-resonant lasers