Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half

Details Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half

2008-08-18

arxiv.org/abs/0808.2353v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.102.033601

To establish an applicable system for advanced quantum information processing between light and atoms, we have demonstrated the quantum non-demolition (QND) measurement with a collective spin of cold ytterbium atoms (171Yb), and observed 1.8 (-1.5, +2.4) dB spin squeezing. Since a 171Yb atom has only a nuclear spin of 1/2 in the ground state, the system is the simplest spin ensemble and robust against decoherence. We used very short pulses with the width of 100 ns, so the interaction time became much shorter than the decoherence time, which is important for multi-step quantum information processing.

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