Linear optical quantum metrology with single photons: Experimental errors, resource counting, and quantum Cramér-Rao bounds

Publication Type:
Journal Article
Physical Review A, 2017, 96 (1)
Issue Date:
Full metadata record
Files in This Item:
Filename Description Size
PhysRevA.96.013810.pdfPublished Version741.36 kB
Adobe PDF
© 2017 American Physical Society. Quantum number-path entanglement is a resource for supersensitive quantum metrology and in particular provides for sub-shot-noise or even Heisenberg-limited sensitivity. However, such number-path entanglement is thought to have been resource intensive to create in the first place, typically requiring either very strong nonlinearities or nondeterministic preparation schemes with feedforward, which are difficult to implement. Recently [K. R. Motes, Phys. Rev. Lett. 114, 170802 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.170802], it was shown that number-path entanglement from a BosonSampling inspired interferometer can be used to beat the shot-noise limit. In this paper we compare and contrast different interferometric schemes, discuss resource counting, calculate exact quantum Cramér-Rao bounds, and study details of experimental errors.
Please use this identifier to cite or link to this item: