Volume 123, Number 2, July 2018
|Number of page(s)||7|
|Published online||24 August 2018|
Spin-squeezed atomic crystal
1 Laboratoire Kastler Brossel, ENS-PSL, CNRS, UPMC-Sorbonne Université and Collège de France Paris, France
2 Institute of Physics, PAS - Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
Received: 14 February 2018
Accepted: 29 July 2018
We propose a method to obtain a regular arrangement of two-level atoms in a three-dimensional optical lattice with unit filling, where all the atoms share internal state coherence and metrologically useful quantum correlations. Such a spin-squeezed atomic crystal is obtained by adiabatically raising an optical lattice in an interacting two-component Bose-Einstein condensate. The scheme could be directly implemented on a microwave transition with state-of-the-art techniques and used in optical-lattice atomic clocks with bosonic atoms to strongly suppress the collisional shift and benefit from the spins quantum correlations at the same time.
PACS: 03.75.Gg – Entanglement and decoherence in Bose-Einstein condensates / 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow / 42.50.Dv – Quantum state engineering and measurements
© EPLA, 2018
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