Quantum Gates with Phase Stability over Space and Time

Abstract

The performance of a quantum information processor depends on the precise control of phases introduced into the system during quantum gate operations. As the number of operations increases with the complexity of a computation, the phases of gates at different locations and different times must be controlled, which can be challenging for optically-driven operations. We circumvent this issue by demonstrating an entangling gate between two trapped atomic ions that is insensitive to the optical phases of the driving fields, while using a common master reference clock for all coherent qubit operations. Such techniques may be crucial for scaling to large quantum information processors in many physical platforms.

References in corpus (19)

• Quantum Computing
• Quantum computing with trapped ions
• Engineered 2D Ising interactions on a trapped-ion quantum simulator with hundreds of spins
• Entanglement and quantum computation with ions in thermal motion
• Single-Spin Addressing in an Atomic Mott Insulator
• Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• Microwave quantum logic gates for trapped ions
• Trapped ion quantum computation with transverse phonon modes
• Phase Control of Trapped Ion Quantum Gates
• Entanglement of Atomic Qubits using an Optical Frequency Comb
• Spin-dependent forces on trapped ions for phase-stable quantum gates and motional Schrodinger-cat states
• Entanglement of Trapped-Ion Clock States
• Robust Trapped-Ion Quantum Logic Gates by Continuous Dynamical Decoupling
• Coherent Error Suppression in Multi-Qubit Entangling Gates
• Demonstration of a dressed-state phase gate for trapped ions
• Probabilistic Quantum Gates between Remote Atoms through Interference of Optical Frequency Qubits
• Driven Geometric Phase Gates with Trapped Ions
• Beat note stabilization of mode-locked lasers for quantum information processing

Cited by in corpus (12)

• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Cryogenic Trapped-Ion System for Large Scale Quantum Simulation
• Multi-Species Trapped Ion Node for Quantum Networking
• A tweezer array with 6100 highly coherent atomic qubits
• High-fidelity Two-qubit Gates Using a MEMS-based Beam Steering System for Individual Qubit Addressing
• Dispersive optical systems for scalable Raman driving of hyperfine qubits
• Fault-Tolerant Operation of a Quantum Error-Correction Code
• Crosstalk Suppression in Individually Addressed Two-Qubit Gates in a Trapped-Ion Quantum Computer
• Engineering the Quantum Scientific Computing Open User Testbed (QSCOUT): Design details and user guide
• Hidden Inverses: Coherent Error Cancellation at the Circuit Level
• Spontaneous Raman scattering out of a metastable atomic qubit
• Non-equilibrium critical scaling and universality in a quantum simulator