Experimental realization of a fast controlled-Z gate via a shortcut-to-adiabaticity

Abstract

For a frequency-tunable two-qubit system, a controlled-Z (CZ) gate can be realized by adiabatically driving the qubit system through an avoided level crossing between an auxiliary state and computational levels. Here, we theoretically propose a fast CZ gate using a shortcut-to-adiabaticity (STA). Experimentally, the STA CZ gate is implemented with a 52 ns control pulse for two coupled superconducting Xmon qubits. Measured fidelity of the STA CZ gate is higher than 96.0%, in both quantum process tomography and randomized benchmarking. The protocol allows a flexible design of the evolution time and control waveform. We suggest that this `fast adiabatic' CZ gate can be directly applied to other multi-qubit quantum systems.

arXiv comment7 pages, 4 figures

References in corpus (36)

• Quantum Computing
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Randomized Benchmarking of Quantum Gates
• A Two Qubit Logic Gate in Silicon
• Quantum information processing with superconducting circuits: a review
• Coherent Josephson qubit suitable for scalable quantum integrated circuits
• A programmable two-qubit quantum processor in silicon
• Shortcut to adiabatic passage in two and three level atoms
• Qubit architecture with high coherence and fast tunable coupling
• Quantum CNOT Gate for Spins in Silicon
• Shortcuts to adiabaticity by counter-diabatic driving
• Chiral groundstate currents of interacting photons in a synthetic magnetic field
• Spectral signatures of many-body localization with interacting photons
• High-fidelity quantum driving
• Efficient measurement of quantum gate error by interleaved randomized benchmarking
• Assisted finite-rate adiabatic passage across a quantum critical point: Exact solution for the quantum Ising model
• Quantum Process Tomography of a Universal Entangling Gate Implemented with Josephson Phase Qubits
• Accelerated quantum control using superadiabatic dynamics in a solid-state lambda system
• Randomized benchmarking and process tomography for gate errors in a solid-state qubit
• Multiple Schrödinger pictures and dynamics in shortcuts to adiabaticity
• Fast-forward of adiabatic dynamics in quantum mechanics
• Experimental realization of stimulated Raman shortcut-to-adiabatic passage with cold atoms
• Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
• Quantum logic gates for coupled superconducting phase qubits
• Experimental implementation of assisted quantum adiabatic passage in a single spin
• Fast adiabatic qubit gates using only ${\sigma }_z$ control
• Shortcuts to adiabaticity by counterdiabatic driving for trapped-ion displacement in phase space
• Broadband parametric amplification with impedance engineering: Beyond the gain-bandwidth product
• Characterizing errors on qubit operations via iterative randomized benchmarking
• Superadiabatic Controlled Evolutions and Universal Quantum Computation
• Quantum process tomography of two-qubit controlled-Z and controlled-NOT gates using superconducting phase qubits
• High-fidelity CZ gate for resonator-based superconducting quantum computers
• The experimental realization of high-fidelity `shortcut-to-adiabaticity' quantum gates in a superconducting Xmon qubit
• Measuring the Berry Phase in a Superconducting Phase Qubit by a Shortcut to Adiabaticity
• Experimental demonstration of work fluctuations along a shortcut to adiabaticity with a superconducting Xmon qubit

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• Quantum Control via Enhanced Shortcuts to Adiabaticity
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• Generalized transitionless quantum driving for open quantum systems
• Connection between inverse engineering and optimal control in shortcuts to adiabaticity
• A simultaneous feedback and feed-forward control and its application to realize a random walk on the Bloch sphere in a superconducting Xmon-qubit system
• Optimization of Controlled-Z Gate with Data-Driven Gradient Ascent Pulse Engineering in a Superconducting Qubit System
• Accelerated ground-state cooling of an optomechanical resonator via shortcuts to adiabaticity
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• Shortcut-to-Adiabatic Controlled-Phase Gate in Rydberg Atoms
• Tantalum airbridges for scalable superconducting quantum processors
• Robustness of controlled Hamiltonian approaches to unitary quantum gates
• CZ vs Beam Splitter: errors of entangled operations
• Simulating finite-time quantum isothermal processes with generic superconducting quantum circuit
• Two-qubit gate in neutral atoms using transitionless quantum driving
• Simulation of a feedback-based algorithm for quantum optimization for a realistic neutral atom system with an optimized small-angle controlled-phase gate
• Quantify the Non-Markovian Process with Intervening Projections in a Superconducting Processor
• Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe
• Experimental Determination of Electronic States via Digitized Shortcut-to-Adiabaticity and Sequential Digitized Adiabaticity
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• Symmetric $C_Z$ gate for ultracold neutral atoms based on counterdiabatic driving at Rydberg excitation