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

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

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

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
Volume102
Issue number3
DOIs
Publication statusPublished - 2009 Jan 20
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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