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

T. Takano*, M. Fuyama, R. Namiki, Y. Takahashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)


In order to establish an applicable system for advanced quantum information processing based on the interaction between light and atoms, we have demonstrated a quantum nondemolition measurement with a collective spin of cold ytterbium atoms (Yb171), and have observed 1.8-1.5+2.4dB spin squeezing. Since Yb171 atoms have only a nuclear spin of one-half in the ground state, the system constitutes the simplest spin ensemble and is thus robust against decoherence. We used very short pulses with a width of 100 ns, and as a result the interaction time became much shorter than the decoherence time, which is important for multistep quantum information processing.

Original languageEnglish
Article number033601
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 2009 Jan 20
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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