Semiconductor-inspired design principles for superconducting quantum computing

Abstract

Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the threshold for fault-tolerant quantum information processing. Competition in the solid-state comes from semiconductor qubits, where nature has bestowed some very useful properties which can be utilized for spin qubit based quantum computing. Here we begin to explore how selective design principles deduced from spin-based systems could be used to advance superconducting qubit science. We take an initial step along this path proposing an encoded qubit approach realizable with state-of-the-art tunable Josephson junction qubits. Our results show that this design philosophy holds promise, enables microwave-free control, and offers a pathway to future qubit designs with new capabilities such as with higher fidelity or, perhaps, operation at higher temperature. The approach is also especially suited to qubits based on variable super-semi junctions.

10 pages, 6 figures, accepted version

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Cited by in corpus (18)

• Milestones toward Majorana-based quantum computing
• Erasure qubits: Overcoming the $T_1$ limit in superconducting circuits
• Dual-rail encoding with superconducting cavities
• Demonstrating a long-coherence dual-rail erasure qubit using tunable transmons
• Voltage-Controlled Superconducting Quantum Bus
• Universal non-adiabatic control of small-gap superconducting qubits
• Time scales for Majorana manipulation using Coulomb blockade in gate-controlled superconducting nanowires
• Handling Leakage with Subsystem Codes
• Resonant shortcuts for adiabatic rapid passage with only $z$-field control
• Speeding up adiabatic passage with an optimal modified Roland-Cerf protocol
• Possible superconductivity in brain
• Steady-state entanglement between distant quantum dots in photonic crystal dimers
• Push-Pull Optimization of Quantum Controls
• Quantum emulation of coherent backscattering in a system of superconducting qubits
• Logical multi-qubit entanglement with dual-rail superconducting qubits
• Surface Code with Imperfect Erasure Checks
• Superconductivity in hyperdoped Ge by molecular beam epitaxy
• Doubling Qubits in a Trapped-Ion System via Vibrational Dual-Rail Encoding