Quantum

Single-shot ground-state preparation via strongly coupled baths

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 06/11/2026, 05:13:24 UTC.

Briefings

A research team announced the development of new cooling protocols for quantum systems that operate under strong system-bath coupling, achieving accurate state preparation in a single cycle. The study introduces 'Möbius-Ingham' protocols that optimize the trade-off between cooling error and physical time, reducing dynamics to a two-level scattering problem. Benchmarks on free-fermion systems, interacting Ising chains, and the Fermi-Hubbard model confirm the protocols' effectiveness, with the authors extending the method to Gibbs state preparation.

Key points

• The study constructs cooling protocols at strong system-bath coupling, achieving accurate state preparation within a single cooling cycle.
• Möbius-Ingham protocols optimize the trade-off between cooling error and physical time, reducing dynamics to a two-level scattering problem.

Context

Dissipative protocols for quantum simulation have emerged as a solution for near-term and fault-tolerant hardware, but most constructions rely on weak system-bath coupling, leading to slow cooling. This work addresses that limitation by demonstrating effective cooling at strong coupling.

Limitations

The evidence is a preprint (arXiv:2611.07021v1) from November 2026, so the findings are subject to future revision. The study covers free-fermion systems, interacting Ising chains, and the Fermi-Hubbard model, but the specific city or region of the research team is not mentioned in the provided evidence.

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