Modular tunable coupler for superconducting qubits

Abstract

The development of modular and versatile quantum interconnect hardware is a key next step in the scaling of quantum information platforms to larger size and greater functionality. For superconducting quantum systems, fast and well-controlled tunable circuit couplers will be paramount for achieving high fidelity and resource efficient connectivity, whether for performing two-qubit gate operations, encoding or decoding a quantum data bus, or interfacing across modalities. Here we propose a versatile and internally-tunable double-transmon coupler (DTC) architecture that implements tunable coupling via flux-controlled interference in a three-junction dcSQUID. Crucially, the DTC possesses an internally defined zero-coupling state that is independent of the coupled data qubits or circuit resonators. This makes it particular attractive as a modular and versatile design element for realizing fast and robust linear coupling in several applications such as high-fidelity two-qubit gate operations, qubit readout, and quantum bus interfacing.

References in corpus (47)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the 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
• A Quantum Engineer's Guide to Superconducting Qubits
• Coupling Superconducting Qubits via a Cavity Bus
• Strong quantum computational advantage using a superconducting quantum processor
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Qubit architecture with high coherence and fast tunable coupling
• Chiral groundstate currents of interacting photons in a synthetic magnetic field
• A blueprint for demonstrating quantum supremacy with superconducting qubits
• A tunable coupling scheme for implementing high-fidelity two-qubit gates
• Exponential suppression of bit or phase flip errors with repetitive error correction
• Introduction to Quantum Electromagnetic Circuits
• Quantum walks on a programmable two-dimensional 62-qubit superconducting processor
• A universal gate for fixed-frequency qubits via a tunable bus
• Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
• Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler
• Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
• High-fidelity, high-scalability two-qubit gate scheme for superconducting qubits
• Parametrically Activated Entangling Gates Using Transmon Qubits
• Tunable Coupling Architecture for Fixed-frequency Transmons
• First-order sideband transitions with flux-driven asymmetric transmon qubits
• Demonstration of a High-Fidelity CNOT for Fixed-Frequency Transmons with Engineered ZZ Suppression
• On-Demand Directional Microwave Photon Emission Using Waveguide Quantum Electrodynamics
• Implementation of Conditional-Phase Gates based on tunable ZZ-Interactions
• Random access quantum information processors
• Microwave-activated conditional-phase gate for superconducting qubits
• A superconducting qubit with Purcell protection and tunable coupling
• Quantum superposition of a single microwave photon in two different "colour" states
• High fidelity two-qubit gates on fluxoniums using a tunable coupler
• Demonstration of a Tuneable Coupler for Superconducting Qubits Using Coherent, Time Domain, Two-Qubit Operations
• Suppression of Unwanted $ZZ$ Interactions in a Hybrid Two-Qubit System
• Tunable coupling scheme for flux qubits at the optimal point
• Tunable coupler for realizing a controlled-phase gate with dynamically decoupled regime in a superconducting circuit
• Characterizing and optimizing qubit coherence based on SQUID geometry
• Circuit quantization in the presence of time-dependent external flux
• Parametric-resonance entangling gates with a tunable coupler
• Realizing a Deterministic Source of Multipartite-Entangled Photonic Qubits
• Scalable quantum computing with qudits on a graph
• Floating tunable coupler for scalable quantum computing architectures
• Long-distance transmon coupler with CZ gate fidelity above $99.8\%$
• Double-Transmon Coupler: Fast Two-Qubit Gate with No Residual Coupling for Highly Detuned Superconducting Qubits
• Tunable-Cavity QED with Phase Qubits
• Tunable coupling of widely separated superconducting qubits: A possible application towards a modular quantum device
• Perturbative diagonalization for time-dependent strong interactions
• Fast parametric two-qubit gate for highly detuned fixed-frequency superconducting qubits using a double-transmon coupler

Cited by in corpus (15)

• Realization of High-Fidelity CZ Gate based on a Double-Transmon Coupler
• Modular quantum processor with an all-to-all reconfigurable router
• Cyclic solid-state quantum battery: Thermodynamic characterization and quantum hardware simulation
• Tunable coupler to fully decouple and maximally localize superconducting qubits
• Dynamical blockade of a reservoir for optimal performances of a quantum battery
• Boosting energy transfer between quantum devices through spectrum engineering in the dissipative ultrastrong coupling regime
• High-performance multiqubit system with double-transmon couplers: Toward scalable superconducting quantum computers
• Efficient two-qutrit gates in superconducting circuits using parametric coupling
• Collisional charging of a transmon quantum battery
• State Preparation in a Jaynes-Cummings Lattice with Quantum Optimal Control
• Capacitively Shunted Double-Transmon Coupler Realizing Bias-Free Idling and High-Fidelity CZ Gate
• Quantum Shortcut to Adiabaticity for State Preparation in a Finite-Sized Jaynes-Cummings Lattice
• Bosonic Entanglement and Quantum Sensing from Energy Transfer in two-tone Floquet Systems
• Optimizing the frequency positioning of tunable couplers in a circuit QED processor to mitigate spectator effects on quantum operations
• Tunable Hybrid-Mode Coupler Enabling Strong Interactions between Transmons at Centimeter-Scale Distance