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5 March 2021 Efficient purification of a spin bath by an interacting ensemble of NV spins in diamond
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The study of open quantum systems, quantum thermodynamics and quantum many-body spin physics in realistic solid-state platforms, has been a long-standing goal in quantum and condensed-matter physics. In this talk I will address these topics through the platform of nitrogen-vacancy (NV) spins in diamond, in the context of purification (or cooling) of a spin bath as a quantum resource and for enhanced metrology. I will first describe a general theoretical framework we developed for Hamiltonian engineering in an interacting spin system [1]. I will then extend this framework to coupling of the spin ensemble to a spin bath, including both coherent and dissipative dynamics [2]. Using these tools I will present a scheme for efficient purification of the spin bath, surpassing the current state-of-the-art and providing a path toward applications in quantum technologies, such as enhanced MRI sensing.
Conference Presentation
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Nir Bar-Gill and Kevin I. O. Ben'Attar "Efficient purification of a spin bath by an interacting ensemble of NV spins in diamond", Proc. SPIE 11699, Quantum Computing, Communication, and Simulation, 116991C (5 March 2021);

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