Weak value amplification and Hong Ou Mandel effects for quantum sensing
Tipus de documentTreball Final de Grau
Data2021-07-13
Condicions d'accésAccés obert
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Abstract
The use of new states of light (quantum sensing and quantum imaging) has opened the door to new protocols for parameter estimation with enhanced resolution. In this project we study two techniques that allow increasing the resolution of measurements, allowing the detection of extremely small changes in variables. In one case, when resolution is limited by technical noise, the protocol is Weak Value Amplification (WVA). In the second case, we make use of quantum interference and develop a new type of microscope (Quantum Differential Interference Contrast, QDIC) that does phase retrieval based on the Hong-Ou- Mandel effect. We consider phase objects, such as sub-wavelength gratings and cliff-like structures, to show the capabilities and potential of the techniques considered. In this project we will explore how the birefringence induced in the Differential Interference contrast microscopy system can be translated into temporal delays that can be measured with WVA. The Hong Ou Mandel (HOM) effect was demonstrated in 1987 as a way to measure subpicosecond time intervals between two Photons. It is an effect very sensitive to differences between the photons that interfere (polarization, temporal delay, spatial shape...). We will explore in this project how phase differences introduced by objects can be translated into different states of polarization that can be measured with HOM.
TitulacióGRAU EN ENGINYERIA FÍSICA (Pla 2011)
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Annex_Anna_Migó.pdf.zip | 157,4Kb | application/zip | Visualitza/Obre | |
TFG_Anna_Migo.pdf | 1,821Mb | Visualitza/Obre |