Engineering entanglement for metrology with rotating matter waves

Rico-Gutierrez, L M, Spiller, T P and Dunningham, J A (2013) Engineering entanglement for metrology with rotating matter waves. New Journal of Physics, 15 (6). 063010. ISSN 1367-2630

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Entangled states of rotating, trapped ultracold bosons form a very promising scenario for quantum metrology. In order to employ such states for metrology, it is vital to understand their detailed form and the enhanced accuracy with which they could measure phase, in this case generated through rotation. In this work, we study the rotation of ultracold bosons in an asymmetric trapping potential beyond the lowest Landau level (LLL) approximation. We demonstrate that while the LLL can identify reasonably the critical frequency for a quantum phase transition and entangled state generation, it is vital to go beyond the LLL to identify the details of the state and quantify the quantum Fisher information (which bounds the accuracy of the phase measurement). We thus identify a new parameter regime for useful entangled state generation, amenable to experimental investigation.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Jacob Dunningham
Date Deposited: 04 Jun 2015 14:45
Last Modified: 09 Mar 2017 21:28

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