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Nuclear spin squeezing in Helium-3 by continuous quantum nondemolition measurement

Abstract : We propose a technique to control the macroscopic collective nuclear spin of a Helium-3 vapor in the quantum regime using light. The scheme relies on metastability exchange collisions to mediate interactions between optically accessible metastable states and the ground-state nuclear spin, giving rise to an effective nuclear spin-light quantum nondemolition interaction of the Faraday form. Our technique enables measurement-based quantum control of nuclear spins, such as the preparation of spin-squeezed states. This, combined with the day-long coherence time of nuclear spin states in Helium-3, opens the possibility for a number of applications in quantum technology.
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Contributor : Alice Sinatra Connect in order to contact the contributor
Submitted on : Thursday, December 2, 2021 - 4:39:53 PM
Last modification on : Friday, December 3, 2021 - 11:42:39 AM



Alan Serafin, Matteo Fadel, Philipp Treutlein, Alice Sinatra. Nuclear spin squeezing in Helium-3 by continuous quantum nondemolition measurement. Physical Review Letters, American Physical Society, 2021, 127 (1), pp.013601. ⟨10.1103/PhysRevLett.127.013601⟩. ⟨hal-03058456v2⟩



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