Spin Squeezing of Atomic Ensembles via Nuclear-Electronic Spin Entanglement

2008/02/20 by T. Fernholz, Hanna Krauter, H. Krauter +7 · 3 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum optics and atomic interactions #quant-ph

paper · pdf · doi:10.1103/physrevlett.101.073601

published as Phys. Rev. Lett. 101, 073601 (2008) · 5 pages, 3 figures

arxiv created 2008/02/20 · openalex publication_date 2008/08/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We demonstrate spin squeezing in a room temperature ensemble of approximately 10(12) cesium atoms using their internal structure, where the necessary entanglement is created between nuclear and electronic spins of each individual atom. This state provides improvement in measurement sensitivity beyond the standard quantum limit for quantum memory experiments and applications in quantum metrology and is thus a complementary alternative to spin squeezing obtained via interatom entanglement. Squeezing of the collective spin is verified by quantum state tomography.

Citations

• Demonstration of a Stable Atom-Photon Entanglement Source for Quantum Repeaters
• Nondestructive Probing of Rabi Oscillations on the Cesium Clock Transition near the Standard Quantum Limit
• Experimental demonstration of quantum memory for light

Cited by

• Quantum interface between light and atomic ensembles
• Sudden vanishing of spin squeezing under decoherence
• Cancellation of nonlinear Zeeman shifts with light shifts