Long-Range $ZZ$ Interaction via Resonator-Induced Phase in Superconducting Qubits

Abstract

Superconducting quantum computing emerges as one of leading candidates for achieving quantum advantage. However, a prevailing challenge is the coding overhead due to limited quantum connectivity, constrained by nearest-neighbor coupling among superconducting qubits. Here, we propose a novel multimode coupling scheme using three resonators driven by two microwaves, based on the resonator-induced phase gate, to extend the $ZZ$ interaction distance between qubits. We demonstrate a CZ gate fidelity exceeding 99.9\% within 160 ns at free spectral range (FSR) of 1.4 GHz, and by optimizing driving pulses, we further reduce the residual photon to nearly $10^{-3}$ within 100 ns at FSR of 0.2 GHz. These facilitate the long-range CZ gate over separations reaching sub-meters, thus significantly enhancing qubit connectivity and making a practical step towards the scalable integration and modularization of quantum processors. Specifically, our approach supports the implementation of quantum error correction codes requiring high connectivity, such as low-density parity check codes that paves the way to achieving fault-tolerant quantum computing.

7 pages, 4 figures

References in corpus (57)

• Quantum Computing in the NISQ era and beyond
• Fault-tolerant quantum computation by anyons
• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the Cooper pair box
• Surface codes: Towards practical large-scale quantum computation
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Quantum Simulation
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• QuTiP: An open-source Python framework for the dynamics of open quantum systems
• Circuit Quantum Electrodynamics
• A Quantum Engineer's Guide to Superconducting Qubits
• Quantum Teleportation is a Universal Computational Primitive
• Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
• Coupling Superconducting Qubits via a Cavity Bus
• Atomic physics and quantum optics using superconducting circuits
• Strong quantum computational advantage using a superconducting quantum processor
• Building logical qubits in a superconducting quantum computing system
• Qubit architecture with high coherence and fast tunable coupling
• 10-qubit entanglement and parallel logic operations with a superconducting circuit
• High-threshold and low-overhead fault-tolerant quantum memory
• A tunable coupling scheme for implementing high-fidelity two-qubit gates
• Exponential suppression of bit or phase flip errors with repetitive error correction
• Quantum Networking with Optical Fibres
• Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
• Distributed Quantum Computation Based-on Small Quantum Registers
• Deterministic Quantum State Transfer and Generation of Remote Entanglement using Microwave Photons
• Quantum Low-Density Parity-Check Codes
• Quantum walks on a programmable two-dimensional 62-qubit superconducting processor
• Deterministic teleportation of a quantum gate between two logical qubits
• Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler
• Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems
• High-fidelity, high-scalability two-qubit gate scheme for superconducting qubits
• Deterministic multi-qubit entanglement in a quantum network
• Fast adiabatic qubit gates using only ${\sigma }_z$ control
• Tradeoffs for reliable quantum information storage in 2D systems
• Deterministic remote entanglement of superconducting circuits through microwave two-photon transitions
• Demonstration of a High-Fidelity CNOT for Fixed-Frequency Transmons with Engineered ZZ Suppression
• On-Demand Directional Microwave Photon Emission Using Waveguide Quantum Electrodynamics
• Experimental demonstration of a resonator-induced phase gate in a multi-qubit circuit QED system
• Solid-state qubits integrated with superconducting through-silicon vias
• Low-overhead fault-tolerant quantum computing using long-range connectivity
• Low-loss interconnects for modular superconducting quantum processors
• Violating Bell's inequality with remotely-connected superconducting qubits
• High-contrast ZZ interaction using superconducting qubits with opposite-sign anharmonicity
• Constant-overhead quantum error correction with thin planar connectivity
• High contrast qubit interactions using multimode cavity QED
• Floating tunable coupler for scalable quantum computing architectures
• Optimized pulse shapes for a resonator-induced phase gate
• Time-Efficient Constant-Space-Overhead Fault-Tolerant Quantum Computation
• High-fidelity resonator-induced phase gate with single-mode squeezing
• Higher-dimensional quantum hypergraph-product codes
• Distributed quantum error correction for chip-level catastrophic errors
• Long-range connectivity in a superconducting quantum processor using a ring resonator
• Deterministic quantum state transfer between remote qubits in cavities
• Long-range entanglement is necessary for a topological storage of quantum information
• Entangling interactions between artificial atoms mediated by a multimode left-handed superconducting ring resonator

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