Controlled-Z gate for transmon qubits coupled by semiconductor junctions

Abstract

We analyze the coupling of two qubits via an epitaxial semiconducting junction. In particular, we consider three configurations that include pairs of transmons or gatemons as well as gatemon-like two qubits formed by an epitaxial four-terminal junction. These three configurations provide an electrical control of the interaction between the qubits by applying voltage to a metallic gate near the semiconductor junction and can be utilized to naturally realize a controlled-Z gate (CZ). We calculate the fidelity and timing for such CZ gate. We demonstrate that in the absence of decoherence, the CZ gate can be performed under $50\mathrm{ns}$ with gate error below $10^{-4}$.

arXiv comment12 pages, 12 figures

References in corpus (30)

• Charge insensitive qubit design derived from the Cooper pair box
• Coupling Superconducting Qubits via a Cavity Bus
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• Quantum information processing with superconducting circuits: a review
• Demonstration of conditional gate operation using superconducting charge qubits
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Qubit architecture with high coherence and fast tunable coupling
• Tunable Supercurrent Through Semiconductor Nanowires
• Procedure for systematically tuning up crosstalk in the cross resonance gate
• A simple all-microwave entangling gate for fixed-frequency superconducting qubits
• A Semiconductor Nanowire-Based Superconducting Qubit
• Fidelity of quantum operations
• Two-dimensional epitaxial superconductor-semiconductor heterostructures: A platform for topological superconducting networks
• Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements
• Quantum Process Tomography of a Universal Entangling Gate Implemented with Josephson Phase Qubits
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• Multi-terminal Josephson junctions as topological materials
• Quantum logic gates for coupled superconducting phase qubits
• Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful Josephson Junction
• Microwave-activated conditional-phase gate for superconducting qubits
• Single fermion manipulation via superconducting phase differences in multiterminal Josephson junctions
• High-fidelity gates in a Josephson qubit
• Quantum process tomography of two-qubit controlled-Z and controlled-NOT gates using superconducting phase qubits
• Topological Andreev bands in three-terminal Josephson junctions
• Gatemon Benchmarking and Two-Qubit Operation
• High-fidelity CZ gate for resonator-based superconducting quantum computers
• Non-trivial Chern numbers in three-terminal Josephson junctions
• Anharmonicity of a Gatemon Qubit with a Few-Mode Josephson Junction
• Weyl nodes in Andreev spectra of multiterminal Josephson junctions: Chern numbers, conductances and supercurrents

Cited by in corpus (16)

• The multi-terminal Josephson effect
• A perspective on semiconductor-based superconducting qubits
• Superconducting proximity effect in epitaxial Al-InAs heterostructures
• Transport Studies in a Gate-Tunable Three-Terminal Josephson Junction
• Transport Properties of Near Surface InAs Two-dimensional Heterostructures
• Voltage-Controlled Superconducting Quantum Bus
• Topological supercurrents interaction and fluctuations in the multiterminal Josephson effect
• Selective Control of Conductance Modes in Multi-terminal Josephson Junctions
• Superconducting resonators with voltage-controlled frequency and nonlinearity
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Tunable Capacitor For Superconducting Qubits Using an InAs/InGaAs Heterostructure
• Gatemonium: A Voltage-Tunable Fluxonium
• Classical-Quantum Noise Mitigation for NISQ Hardware
• Hybridization mechanism of the dual proximity effect in superconductor-topological insulator interfaces
• Superconducting-semiconducting voltage-tunable qubits in the third dimension
• Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction