Quantum metrology with entangled spin-coherent states of two modes

Ooi, Chong Heng Raymond and Berrada, K. and Khalek, S.A. (2012) Quantum metrology with entangled spin-coherent states of two modes. Physical Review A, 86 (3). 033823. ISSN 2469-9926, DOI https://doi.org/10.1103/PhysRevA.86.033823.

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Official URL: https://doi.org/10.1103/PhysRevA.86.033823


Recently, Gerry et al. [Phys. Rev. A 79, 022111 (2009)] studied the violation of the Bell-Clauser-Horne-Shimony-Holt inequality for two-spin systems, prepared in an entanglement of spin-coherent states, the so-called entangled spin-coherent states (ESCSs), and found maximal violations for a large class of states. In this paper, using the Holstein-Primakoff realization (HPR) of angular momentum algebra, we present an improved phase estimation scheme employing ESCSs and demonstrate that increasing the spin number gives the smallest variance in the phase parameter in comparison to NOON states under perfect and lossy conditions. The phase sensitivity of this interferometric scheme with parity detection on one of the output states is discussed.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Noise, Quantum metrology; Spin-coherent; Bell-Clauser-Horne-Shimony-Holt inequality
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 08 Jul 2013 04:22
Last Modified: 09 Oct 2019 08:09
URI: http://eprints.um.edu.my/id/eprint/7972

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