Robust two-qubit trapped ions gates using spin-dependent squeezing

Abstract

Entangling gates are an essential component of quantum computers. However, generating high-fidelity gates, in a scalable manner, remains a major challenge in all quantum information processing platforms. Accordingly, improving the fidelity and robustness of these gates has been a research focus in recent years. In trapped ions quantum computers, entangling gates are performed by driving the normal modes of motion of the ion chain, generating a spin-dependent force. Even though there has been significant progress in increasing the robustness and modularity of these gates, they are still sensitive to noise in the intensity of the driving field. Here we supplement the conventional spin-dependent displacement with spin-dependent squeezing, which enables a gate that is robust to deviations in the amplitude of the driving field. We solve the general Hamiltonian and engineer its spectrum analytically. We also endow our gate with other, more conventional, robustness properties, making it resilient to many practical sources of noise and inaccuracies.

References in corpus (44)

• Superconducting Qubits: Current State of Play
• Experimental issues in coherent quantum-state manipulation of trapped atomic ions
• Trapped-Ion Quantum Computing: Progress and Challenges
• Quantum computation with ions in thermal motion
• Entanglement and quantum computation with ions in thermal motion
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• Demonstration of the trapped-ion quantum-CCD computer architecture
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Demonstration of fault-tolerant universal quantum gate operations
• Fast quantum logic gates with trapped-ion qubits
• Quantum Computer Systems for Scientific Discovery
• Parallel Entangling Operations on a Universal Ion Trap Quantum Computer
• High-fidelity laser-free universal control of two trapped ion qubits
• Errors in trapped-ion quantum gates due to spontaneous photon scattering
• High-Fidelity Bell-State Preparation with ${}^{40}$Ca${}^{+}$ Optical Qubits
• Scalable global entangling gates on arbitrary ion qubits
• Robust two-qubit gates in a linear ion crystal using a frequency-modulated driving force
• Ion trap quantum gates with amplitude-modulated laser beams
• Robust entanglement gates for trapped-ion qubits
• Robust and resource-efficient microwave near-field entangling ${}^9$Be${}^{+}$ gate
• High-fidelity Two-qubit Gates Using a MEMS-based Beam Steering System for Individual Qubit Addressing
• Phase-modulated decoupling and error suppression in qubit-oscillator systems
• Resilient entanglement gates for trapped ions
• Phase-modulated entangling gates robust to static and time-varying errors
• Demonstration of two-atom entanglement with ultrafast optical pulses
• Fast phase gates with trapped ions
• $N$-body interactions between trapped ion qubits via spin-dependent squeezing
• Theory of robust multi-qubit non-adiabatic gates for trapped-ions
• Crosstalk Suppression in Individually Addressed Two-Qubit Gates in a Trapped-Ion Quantum Computer
• Entangling an arbitrary pair of qubits in a long ion crystal
• High fidelity quantum gates of trapped ions mediated by a dissipative bus mode
• Versatile laser-free trapped-ion entangling gates
• Efficient, stabilized two-qubit gates on a trapped-ion quantum computer
• Fast dynamical decoupling of the Molmer-Sorensen entangling gate
• Batch Optimization of Frequency-Modulated Pulses for Robust Two-qubit Gates in Ion Chains
• Numeric optimization for configurable, parallel, error-robust entangling gates in large ion registers
• Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit and motional decoherence
• Manipulating phonons of a trapped-ion system using optical tweezers
• Trapped Ion Quantum Computing using Optical Tweezers and Electric Fields
• Quantum control methods for robust entanglement of trapped ions
• Strong-coupling quantum logic of trapped ions
• Trapped-Ion Entangling Gates Robust Against Qubit Frequency Errors
• Phase-adaptive dynamical decoupling methods for robust spin-spin dynamics in trapped ions

Cited by in corpus (12)

• Demonstration of three- and four-body interactions between trapped-ion spins
• Angle-robust Two-Qubit Gates in a Linear Ion Crystal
• Realization of programmable Ising models in a trapped-ion quantum simulator
• Two-qubit operations for finite-energy Gottesman-Kitaev-Preskill encodings
• High-fidelity and robust controlled-Z gates implemented with Rydberg atoms via echoing rapid adiabatic passage
• Interaction graph engineering in trapped-ion quantum simulators with global drives
• Transverse Polarization Gradient Entangling Gates for Trapped-Ion Quantum Computation
• Quantum computing architecture with Rydberg gates in trapped ions
• Robust Oscillator-Mediated Phase Gates Driven by Low-Intensity Pulses
• Optimal Displacement Sensing with Spin-Dependent Squeezed States
• Hamiltonian simulation with explicit formulas for Digital-Analog Quantum Computing
• Improving adiabatic quantum factorization via chopped random-basis optimization