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Interferometry and Dissipative Optics with Atoms

100%
Szriftgiser P., Guéry-Odelin D., Desbiolles P., Dalibard J., Arndt M., Steane A.
Acta Physica Polonica A
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1998
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vol. 93
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issue 1
197-209
EN
We have designed a gravitational cavity for ultra-cold atoms using an atomic mirror made from an evanescent laser wave. By a temporal variation of the evanescent wave intensity, we have realized various atom optics components such as temporal slits and phase modulators. We have also designed an atom interferometer using this cavity which proves that the coherence of the de Broglie waves can be preserved during the bounce of the atoms on the mirror. Finally we show that an efficient cooling of the atoms inside the cavity can be achieved using a Sisyphus process during the bounce.
2
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Proposed Experiment with Rydberg Atoms to Study the Influence of Particle Size on Quantum Interference

100%
Gondran M., Božić M., Arsenović D., Gondran A.
Acta Physica Polonica A
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2007
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vol. 112
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issue 5
805-810
EN
We are looking for the answers to some questions which naturally arise when one starts to think about possible influence of the size of a particle on the transmission, diffraction and interference pattern behind an interference grating.
3
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Optimization of a Fabry-Perot Sensing Interferometer Design for an Optical Fiber Sensor of Hematocrit Level

100%
Wierzba P., Jędrzejewska-Szczerska M.
Acta Physica Polonica A
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2013
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vol. 124
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issue 3
586-588
EN
Continuous measurement of the hematocrit level in blood can potentially be performed using optical fibre sensors. The Fabry-Perot interferometric sensors are a promising candidate in this application. The most important step in the design of the sensor is design of the sensing interferometer. Adequate cavity length and high interference contrast are two most important requirements in this application. The design method of the sensing interferometer presented in this paper uses a Gaussian beam approximation. In order to verify the design, an optical fibre Fabry-Perot interferometer with adjustable cavity length was built. Its performance was tested, confirming validity of the design approach.
4
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Coherent Beam Splitting by a Thin Grating

88%
Božić M., Dimić D., Davidović M.
Acta Physica Polonica A
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2009
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vol. 116
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issue 4
479-482
EN
The wide use of beam splitters in quantum interferometry, attosecond metrology, modern quantum information processing, foundations of quantum mechanics, has been based on coherence of beams emerging from a beam splitter. Here we further develop the approach in which a beam splitter is regarded as a transformer of an incident wave field (photon field or matter wave field) into a field which has narrow maxima at the points along and in close vicinity of two or more particular lines. This description was derived by considering a thin grating as a model of a beam splitter for photons, atoms and molecules. It is applied to answer some questions raised in the discussions on the interpretation of wave particle duality.
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