Noise-resistant optimal spin squeezing via quantum control

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T. Pichler, T. Caneva, S. Montangero, M. D. Lukin, and T. Calarco


Phys. Rev. A 93, 013851 (2016)

Entangled atomic states, such as spin-squeezed states, represent a promising resource for a new generation of quantum sensors and atomic clocks. We demonstrate that optimal control techniques can be used to substantially enhance the degree of spin squeezing in strongly interacting many-body systems, even in the presence of noise and imperfections. Specifically, we present a protocol that is robust to noise and outperforms conventional methods. Potential experimental implementations are discussed.