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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper EE2_1

Phase super-resolution using a photonic crystal fibre

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Measurement, whilst being physically fundamental, is also fundamentally physical. Classical interferometric measurements suffer from physical limitations where the shot noise limit forms an upper bound of n on a phase shift ∆ϕ that can be resolved, with n being the average number of photons detected, making their applicability in modern nanoscale experiments quite restricted. Exotic quantum states such as maximally entangled NOON states (|N0A,B+|0NA,B)/2, where N is the number of entangled photons are of particular importance as they have repeatedly been shown to exhibit phase super-resolution [1,2]. Interesting post selection schemes [2] and time-reversed detection schemes [3] have been investigated for phase estimation using NOON states. These methods are inherently non-deterministic at the preparation [2] or measurement [3] stage and thus do not optimise resources, for instance the number of photons passing through the sample greatly exceeds those used in the measurement.

© 2011 IEEE

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