A solid-state platform for cooperative quantum dynamics driven by correlated emission
arxiv(2023)
摘要
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 – 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 dissipatively 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.
Our work lays the foundation for a multi-qubit 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.
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