Sub-Planck structures and Quantum Metrology

Journal Article · Fri Sep 23 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3635847· OSTI ID:21611651

Panigrahi, Prasanta K ^[1]; Kumar, Abhijeet ^[2]; Roy, Utpal; Ghosh, Suranjana ^[3]

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1. Indian Institute of Science Education and Research-Kolkata (India)
2. Indian Institute of Science Education and Research, Pune (India)
3. Indian Institute of Technology Patna (India)

The significance of sub-Planck structures in relation to quantum metrology is explored, in close contact with experimental setups. It is shown that an entangled cat state can enhance the accuracy of parameter estimations. The possibility of generating this state, in dissipative systems has also been demonstrated. Thereafter, the quantum Cramer-Rao bound for phase estimation through a pair coherent state is calculated, which achieves the maximum possible resolution in an interferometer.

• OSTI ID: 21611651
• Journal Information: AIP Conference Proceedings, Vol. 1384, Issue 1; Conference: S. N. Bose National Centre for Basic Sciences silver jubilee symposium: 75 Years of quantum entanglement: foundations and information theoretic applications, Kolkata (India), 6-10 Jan 2011; Other Information: DOI: 10.1063/1.3635847; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

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