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Charge insensitive qubit design derived from the Cooper pair box

5 Pith papers cite this work. Polarity classification is still indexing.

5 Pith papers citing it
abstract

Short dephasing times pose one of the main challenges in realizing a quantum computer. Different approaches have been devised to cure this problem for superconducting qubits, a prime example being the operation of such devices at optimal working points, so-called "sweet spots." This latter approach led to significant improvement of $T_2$ times in Cooper pair box qubits [D. Vion et al., Science 296, 886 (2002)]. Here, we introduce a new type of superconducting qubit called the "transmon." Unlike the charge qubit, the transmon is designed to operate in a regime of significantly increased ratio of Josephson energy and charging energy $E_J/E_C$. The transmon benefits from the fact that its charge dispersion decreases exponentially with $E_J/E_C$, while its loss in anharmonicity is described by a weak power law. As a result, we predict a drastic reduction in sensitivity to charge noise relative to the Cooper pair box and an increase in the qubit-photon coupling, while maintaining sufficient anharmonicity for selective qubit control. Our detailed analysis of the full system shows that this gain is not compromised by increased noise in other known channels.

years

2026 4 2019 1

verdicts

UNVERDICTED 5

representative citing papers

Superconducting qubits beyond the dispersive regime

cond-mat.mes-hall · 2019-07-14 · unverdicted · novelty 6.0

Develops a non-perturbative diagonalization formalism for transmon-resonator circuits yielding closed-form expressions for dressed frequencies and Kerr couplings valid beyond the dispersive regime.

SPICE-Q and Large-Scale Quantum Chip Production

quant-ph · 2026-06-16 · unverdicted · novelty 5.0

SPICE-Q is a proposed unified data-chain framework for co-optimizing process, layout, electromagnetic simulation, circuit quantization, noise, and yield in superconducting quantum processors.

Fabless Quantum Chip Design and Commercial Production

quant-ph · 2026-06-16 · unverdicted · novelty 4.0

Proposes a fabless-foundry ecosystem for superconducting quantum chips built on certified PDKs, SPICE-Q multiphysics modeling, parameterized cells, Q-EDA automation, and a quantum-IP market.

citing papers explorer

Showing 5 of 5 citing papers.

  • Vibe Calibration: Autonomous Bring-up of a 112-Qubit Superconducting Quantum Processor by a Skill-Orchestrating Language Agent quant-ph · 2026-06-21 · unverdicted · none · ref 77 · internal anchor

    Vibe Calibration uses LLM agents to orchestrate reusable decision-tree Skills distilled from expert knowledge, autonomously calibrating 108/112 qubits in 4.7 hours with 4-5x speedup and transferable workflows.

  • Superconducting qubits beyond the dispersive regime cond-mat.mes-hall · 2019-07-14 · unverdicted · none · ref 36 · internal anchor

    Develops a non-perturbative diagonalization formalism for transmon-resonator circuits yielding closed-form expressions for dressed frequencies and Kerr couplings valid beyond the dispersive regime.

  • Quantum simulation of neutrino oscillations with bosonic encoding quant-ph · 2026-06-17 · unverdicted · none · ref 18 · internal anchor

    Bosonic Fock encoding in a cavity, driven by SNAP and displacement pulses, produces neutrino oscillation probabilities that match theoretical predictions for two- and three-flavor cases.

  • SPICE-Q and Large-Scale Quantum Chip Production quant-ph · 2026-06-16 · unverdicted · none · ref 13 · internal anchor

    SPICE-Q is a proposed unified data-chain framework for co-optimizing process, layout, electromagnetic simulation, circuit quantization, noise, and yield in superconducting quantum processors.

  • Fabless Quantum Chip Design and Commercial Production quant-ph · 2026-06-16 · unverdicted · none · ref 17 · internal anchor

    Proposes a fabless-foundry ecosystem for superconducting quantum chips built on certified PDKs, SPICE-Q multiphysics modeling, parameterized cells, Q-EDA automation, and a quantum-IP market.