Near-optimal two-mode spin squeezing via feedback

Dominic W. Berry*, Barry C. Sanders

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)
    14 Downloads (Pure)


    We propose a feedback scheme for the production of two-mode spin squeezing. We determine a general expression for the optimal feedback, which is also applicable to the case of single-mode spin squeezing. The two-mode spin squeezed states obtained via this feedback are optimal for j=1/2 and are very close to optimal for j>1/2. In addition, the master equation suggests a Hamiltonian that would produce two-mode spin squeezing without feedback, and is analogous to the two-axis countertwisting Hamiltonian in the single-mode case.
    Original languageEnglish
    Article number012313
    Pages (from-to)012313-1-012313-10
    Number of pages10
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Issue number1
    Publication statusPublished - 2002

    Bibliographical note

    Copyright 2002 by The American Physical Society. Reprinted from Physical review letters.


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