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Fernholz T, Krauter H, Jensen K, et al. Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement. Phys Rev Lett. 2008;101(7):073601doi: 10.1103/PhysRevLett.101.073601.
Fernholz, T., Krauter, H., Jensen, K., Sherson, J. F., Sørensen, A. S., & Polzik, E. S. (2008). Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement. Physical review letters, 101(7), 073601. https://doi.org/10.1103/PhysRevLett.101.073601
Fernholz, T, et al. "Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement." Physical review letters vol. 101,7 (2008): 073601. doi: https://doi.org/10.1103/PhysRevLett.101.073601
Fernholz T, Krauter H, Jensen K, Sherson JF, Sørensen AS, Polzik ES. Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement. Phys Rev Lett. 2008 Aug 15;101(7):073601. doi: 10.1103/PhysRevLett.101.073601. Epub 2008 Aug 12. PMID: 18764532.
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Phys Rev Lett. 2008 Aug 15;101(7):073601. doi: 10.1103/PhysRevLett.101.073601. Epub 2008 Aug 12.

Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement.

Physical review letters

T Fernholz, H Krauter, K Jensen, J F Sherson, A S Sørensen, E S Polzik

Affiliations

  1. QUANTOP, Danish National Research Foundation Center for Quantum Optics, Niels Bohr Institute, Copenhagen University, DK 2100, Denmark.

PMID: 18764532 DOI: 10.1103/PhysRevLett.101.073601

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.

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