Near-optimal two-mode spin squeezing via feedback

2002/03/31 by Dominic W. Berry, Barry C. Sanders · 20 citations
Computer Science · Physics and Astronomy · #Computer science #Hamiltonian (control theory) #Master equation #Mode (computer interface) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Single-mode optical fiber #Spin (aerodynamics) #quant-ph

paper · pdf · doi:10.1103/physreva.66.012313

published in Physical Review A 66(1) (American Physical Society) · 10 pages, 6 figures, journal version

openalex publication_date 2002/07/25 · arxiv created 2002/09/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• Spin squeezing via quantum feedback
• Squeezed spin states
• Quantum theory of continuous feedback
• Unconditional Quantum Teleportation
• Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet

Cited by

• Continuous quantum nondemolition feedback and unconditional atomic spin squeezing
• Quantum spin squeezing

Related

• Spin squeezing via quantum feedback
• Dynamical spin squeezing: combining fast one-axis twisting and deep two-axis counter-twisting
• Analytical solvability of the two-axis countertwisting spin squeezing Hamiltonian
• Squeezing of a coupled state of two spin-1 systems
• Heisenberg-limit spin squeezing with spin Bogoliubov Hamiltonian