Phase super-resolution using a photonic crystal fibre
Kannan, S., Bell, B., Clark, A., Wadsworth, W. J. and Rarity, J. G., 2011. Phase super-resolution using a photonic crystal fibre. In: 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC). Piscataway, NJ: IEEE.
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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 Δφ 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 (|N0≫A;B +|0N≫A;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  and time-reversed detection schemes  have been investigated for phase estimation using NOON states. These methods are inherently non-deterministic at the preparation  or measurement  stage and thus do not optimise resources, for instance the number of photons passing through the sample greatly exceeds those used in the measurement.
|Item Type||Book Sections|
|Creators||Kannan, S., Bell, B., Clark, A., Wadsworth, W. J. and Rarity, J. G.|
|Departments||Faculty of Science > Physics|
|Research Centres||Centre for Photonics and Photonic Materials|
|Additional Information||2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011. 22-26 May 2011. Munich, Germany.|
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