Quantum

Selective Control and Imaging of Higgs and Goldstone Modes with a Quantum Simulator

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 15/10/2026, 04:13:25 UTC.

Briefings

A quantum simulator using transmon qubits realizes the mesoscopic Bose-Hubbard model at unit-filling, allowing selective excitation of Higgs and Goldstone modes via local observables. The Higgs mode is detected through density fluctuations of doubly occupied sites, while the Goldstone mode is identified via local density changes. Finite system size creates spectral gaps enabling coherent detection, unlike the thermodynamic limit where continuum decay obscures the signal. The study characterizes how geometry affects mode evolution and demonstrates the utility of finite quantum simulators for isolating physical phenomena.

Key points

• The mesoscopic Bose-Hubbard model was realized on a 2D array of transmon qubits at unit-filling.
• Selective excitation of the Higgs mode was detected via density fluctuations of doubly occupied sites.

Context and limitations

The study is limited to a 2D transmon qubit array; finite system size effects on mode evolution were characterized but not fully extended to the thermodynamic limit where continuum decay may obscure the Higgs response.

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