Interestingly, if a detector is added to determine which slit the particle goes through, the probability wave collapses, and the interference pattern disappears. The loss of the superposition is known as quantum decoherence. Superposition and Schrödinger's cat TheSchrödinger's catthought experiment...
Alleviating the almost century old confusion, the correct laws of statistics and logic pinpoint the true oddity of quantum objects: duality. As it is shown in the first part of this short essay, duality plus conservation laws allow the violation of Bell’s inequalities for any spatio-temporal ...
The final phase of the double-slit experiment places a detector at one of the slits to determine which slit the photon travels through. The presence of the detector causes the location of the photon to be known, and therefore, the probability wave of the photon collapses, causing the photon ...
With DV-QKD, quantum states will be measured using a photon detector and quantum information will be encoded in variables. The BB84 protocol is exemplified by the DV-QKD protocol. CV-QKD encrypts quantum entanglement on the phase and amplitude regions of a laser prior to emitting light to ...
Nevertheless, the development in the detector technology will soon allow for near-field investigations; thus, a better understanding of arrival time measurements is needed. Since outcomes of quantum measurements are always described by positive-operator-valued measures (POVMs), various arrival time POV...
Robert Lea is a freelance science journalist focusing on space, astronomy, and physics. Rob’s articles have been published inNewsweek,Space,Live Science,Astronomymagazine andNew Scientist. He lives in the North West of England with too many cats and comic books. ...
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Instead we assume the converse, namely that the source is deterministic but detection involves multiple, independent Poisson processes, one at each detector with an intensity given by Malus ' Law. Finally, we speculate on some consequences this might have for quantum computing algorithms. 1 State ...
The change in absorption is measured by a detector that records the variation in the intensity of the incident light and this information can be used to reconstruct the absorption spectrum that can provide useful information on a sample, such as the HOMO-LUMO separation, a key parameter for opt...
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