A metastable superconducting qubit

Abstract

We propose a superconducting qubit design, based on a tunable RF-SQUID and nanowire kinetic inductors, which has a dramatically reduced transverse electromagnetic coupling to its environment, so that its excited state should be metastable. If electromagnetic interactions are in fact responsible for the current excited-state decay rates of superconducting qubits, this design should result in a qubit lifetime orders of magnitude longer than currently possible. Furthermore, since accurate manipulation and readout of superconducting qubits is currently limited by spontaneous decay, much higher fidelities may be realizable with this design.

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References in corpus (12)

• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Fluxonium: single Cooper pair circuit free of charge offsets
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Decoherence of flux qubits due to 1/f flux noise
• Low-decoherence flux qubit
• Controllable coupling of superconducting flux qubits
• Tuning the Gap of a Superconducting Flux Qubit
• Magnetism in SQUIDs at Millikelvin Temperatures
• Interqubit coupling mediated by a high-excitation-energy quantum object
• Anomalous avoided level crossings in a Cooper-pair box spectrum
• Coupling superconducting flux qubits at optimal point via dynamic decoupling with the quantum bus
• Hamiltonian for coupled flux qubits

Cited by in corpus (19)

• A Quantum Engineer's Guide to Superconducting Qubits
• Superconducting Qubits: Current State of Play
• Tunable superconducting nanoinductors
• High Kinetic Inductance NbN Nanowire Superinductors
• Nanowire Superinductance Fluxonium Qubit
• Protecting a superconducting qubit from energy decay by selection rule engineering
• Quantum simulator of an open quantum system using superconducting qubits: exciton transport in photosynthetic complexes
• Atomic layer deposition of titanium nitride for quantum circuits
• Microwave dynamics of high aspect ratio superconducting nanowires studied using self-resonance
• Universal non-adiabatic control of small-gap superconducting qubits
• Flux-charge duality and topological quantum phase fluctuations in quasi-one-dimensional superconductors
• Quantum-limited measurement of spin qubits via curvature coupling to a cavity
• A Practical Introduction to Benchmarking and Characterization of Quantum Computers
• Initial Design of a W-band Superconducting Kinetic Inductance Qubit (Kineticon)
• Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity
• Efficient numerical simulation of complex Josephson quantum circuits
• Tradeoff between Leakage and Dephasing Errors in the Fluxonium Qubit
• Microscopic charged fluctuators as a limit to the coherence of disordered superconductor devices
• 1/ f noise and two-level systems in MBE-grown Al thin films