Work

Spin squeezing and decoherence limit in Ramsey spectroscopy

Year: 2001

Type: article

Abstract: It is known that a partially entangled state gives improved sensitivity in generalized Ramsey spectroscopy in the presence of decoherence, whereas a maximally entangled state does not. However, it has been an open question whether the known decoherence limit in the improvement is achievable. We show that every spin-squeezed state possesses pairwise entanglement, thereby improving the spectroscopic sensitivity, and that even suboptimal entanglement in its easiest implementation suffices to asymptotically reach the decoherence limit without any measurement optimization.

Source: Physical Review A

DOI: 10.1103/physreva.64.052106

Authors: Duger Ulam-Orgikh, Masahiro Kitagawa

Institutions: The University of Osaka, Japan Science and Technology Agency

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Ministry of Education, Culture, Sports, Science and Technology, Core Research for Evolutional Science and Technology

Award: G7879866177