TBNQuantum
Quantum jumps of sound
Publication: quant-ph updates on arXiv.org
Author: Takuma Makihara, Erik Szakiel, Matthew P. Maksymowych, Oliver A. Hitchcock, Kaveh Pezeshki, Rachel G. Gruenke-Freudenstein, Mihir Pendharkar, Shannon P. Harvey, David I. Schuster, Amir H. Safavi-Naein
Source published: 09/10/2026, 04:00:00 UTC
Briefing created: 09/10/2026, 04:27:05 UTC
Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 09/10/2026, 04:13:24 UTC.
Briefings
A superconducting qubit coupled to a nanomechanical resonator measured phonon number via quantum nondemolition techniques, revealing discrete energy levels in a massive object. The experiment achieved a mechanical lifetime of 2.1 milliseconds and observed single-phonon states with 85% fidelity, demonstrating quantum jumps between the first excited state and ground state.
Key points
- The experiment used a superconducting qubit dispersively coupled to a nanomechanical resonator to perform repeated quantum nondemolition measurements of phonon number.
- The aligned transfer-print technique achieved a mechanical lifetime of 2.1 milliseconds and a dispersive shift of 328 kilohertz per phonon.
Context and limitations
The study is a preprint from arXiv and does not yet represent peer-reviewed publication. Results are subject to experimental verification and further analysis.
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