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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.
|Title of host publication||2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)|
|Place of Publication||Piscataway, NJ|
|Number of pages||1|
|Publication status||Published - 2011|
|Event||2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference - Munich, Germany|
Duration: 22 May 2011 → 26 May 2011
|Conference||2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference|
|Abbreviated title||CLEO EUROPE/EQEC 2011|
|Period||22/05/11 → 26/05/11|
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