Solid-state platform for cooperative quantum dynamics driven by correlated emission

Journal Article · Thu Feb 20 00:00:00 UTC 2025 · Physical Review. B

DOI: https://doi.org/10.1103/PhysRevB.111.064424 · OSTI ID:2909631

Li, Xin  ^[1]; Marino, Jamir  ^[2]; Chang, Darrick E. ^[3]; Flebus, Benedetta  ^[1]

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1. Boston College, Chestnut Hill, MA (United States)
2. Johannes Gutenberg Univ., Mainz (Germany)
3. Barcelona Institute of Science and Technology (BIST) (Spain); Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA)

While traditionally regarded as an obstacle to quantum coherence, recent breakthroughs in quantum optics have shown that the dissipative interaction of a qubit with its environment can be leveraged to protect quantum states and synthesize many-body entanglement. Inspired by this progress, here we set the stage for the—as yet uncharted—exploration of analogous cooperative phenomena in hybrid solid-state platforms. We develop a comprehensive formalism for the quantum many-body dynamics of an ensemble of solid-state spin defects interacting with the magnetic field fluctuations of a common solid-state reservoir. Our framework applies to any solid-state reservoir whose fluctuating spin, pseudospin, or charge degrees of freedom generate magnetic fields. To understand whether correlations induced by dissipative processes can play a relevant role in a realistic experimental setup, we apply our model to a qubit array interacting via the spin fluctuations of a ferromagnetic bath. Our results show that the low-temperature collective relaxation rates of the qubit ensemble can display clear signatures of super- and subradiance, i.e., forms of cooperative dynamics traditionally achieved in atomic ensembles. We find that the solid-state analog of these cooperative phenomena is robust against spatial disorder in the qubit ensemble and thermal fluctuations of the magnetic reservoir, providing a route for their feasibility in near-term experiments. Finally, our work lays the foundation for a multiqubit approach to quantum sensing of solid-state systems and the direct generation of many-body entanglement in spin-defect ensembles. Furthermore, we discuss how the tunability of solid-state reservoirs opens up novel pathways for exploring cooperative phenomena in regimes beyond the reach of conventional quantum optics setups.

• Research Organization: Boston College, Chestnut Hill, MA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0024090
• OSTI ID: 2909631
• Journal Information: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 6 Vol. 111; ISSN 2469-9950; ISSN 2469-9969
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English