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Musu kuantikoek hutsaren kolorea aldatzen dute

Donostia International Physics Center (DIPC) eta Donostiako Materialen Fisika Zentroa (CSIC-UPV/EHU) partaide diren ikerketa batean, lehen aldiz ikusi da erregimen kuantikoa, metodo optikoekin, urrezko bi nanopartikularen arteko interakzioan. Erregimen kuantiko hori identifikatu ahal izan da nanopartikulen arteko espazio hutsaren kolorea aldatu delako, partikulak elkarrengandik nanometro bat baino gutxiagora hurbiltzean. Nature aldizkarian argitaratutako lan horri esker, nanopartikulen arteko musu kuantiko bat "ikusi" egin daiteke egiazki.
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Shaking the electron has strengthened quantum mechanics

Atomic orbital electrons react to change of nucleus electric charge following each beta decay and to flying nearby particles emitted from the nucleus. NCBJ physicists have simulated such processes for the 6He nuclei. Theoretical calculations were recently confirmed by an experiment performed in the GAEN accelerator centre in Caen (France). That way the sudden approximation calculation method (one of the oldest methods employed to solve quantum mechanics problems) was directly validated.
Decays of atomic nuclei are potential sources of information on fundamental phenomena occurring in the quantum world. Unfortunately it is a rather difficult task to model such processes. Yet NCBJ physicists have successfully simulated the process of neutron-> proton conversion in singly ionised 6He atom nucleus and correctly predicted its impact on the atomic orbital sole electron. Theoretical calculations were recently confirmed by an experiment performed in the GAEN accelerator centre in Caen (France). That way the sudden approximation calculation method (one of the oldest methods employed to solve quantum mechanics problems) was directly validated.

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The illusion of rigid objects and exact locations : Quantum Mechanics



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Dimension witnesses
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 Measuring quantum dimensions

A new study from the ICFO (Institute of Photonic Sciences) in Barcelona and the University of Bristol has demonstrated how the dimension of an unknown quantum system can be assessed from measurement data alone. The research is published today in Nature Physics.
In order to study a physical system, scientists usually assume it has a particular dimension. The theoretical models they use to describe experimental observations on such a system thus make an assumption about the dimensionality of the system under consideration.

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Blind men and an elephant

The story of the blind men and an elephant originated in India from where it is widely diffused. It has been used to illustrate a range of truths and fallacies. At various times it has provided insight into the relativity, opaqueness or inexpressible nature of truth, the behaviour of experts in fields where there is a deficit or inaccessibility of information, the need for communication, and respect for different perspectives.
In physics, it has been seen as an analogy for the wave-particle duality.

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Aaron O'Connell: Making sense of a visible quantum object



Physicists are used to the idea that subatomic particles behave according to the bizarre rules of quantum mechanics. In a breakthrough experiment, Aaron O'Connell has blurred that distinction by creating an object that is visible to the unaided eye, but provably in two places at the same time.



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Quantum physics explanation for smell gains traction
 
The theory that our sense of smell has its basis in quantum physics events is gaining traction, say researchers.
The idea remains controversial, but scientists reporting at the American Physical Society meeting in Dallas, US, are slowly unpicking how it could work.
The key, they say, is tiny packets of energy, or quanta, lost by electrons.

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Quantum mechanics flummoxes physicists again

A fresh take on a classic experiment makes no progress in unifying quantum mechanics and relativity.

If you ever want to get your head around the riddle that is quantum mechanics, look no further than the double-slit experiment. This shows, with perfect simplicity, how just watching a wave or a particle can change its behaviour. The idea is so unpalatable to physicists that they have spent decades trying to find new ways to test it. The latest such attempt, by physicists in Europe and Canada, used a three-slit version - but quantum mechanics won out again.
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Quantum Mechanics not in Jeopardy

Physicists confirm a decades-old key principle experimentally

When waves - regardless of whether light or sound - collide, they overlap creating interferences. Austrian and Canadian quantum physicists have now been able to rule out the existence of higher-order interferences experimentally and thereby confirmed an axiom in quantum physics: Born's rule. They have published their findings in the scientific journal Science.
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Title: Observation of the Goos-Hänchen Shift with Neutrons
Authors: Victor-O. de Haan, Jeroen Plomp, Theo M. Rekveldt, Wicher H. Kraan, and Ad A. van Well 

The Goos-Hänchen effect is a spatial shift along an interface resulting from an interference effect that occurs for total internal reflection. This phenomenon was suggested by Sir Isaac Newton, but it was not until 1947 that the effect was experimentally observed by Goos and Hänchen. We provide the first direct, absolute, experimental determination of the Goos-Hänchen shift for a particle experiencing a potential well as required by quantum mechanics: namely, wave-particle duality. Here, the particle is a spin-polarised neutron reflecting from a film of magnetised material. We detect the effect through a subtle change in polarization of the neutron. Here, we demonstrate, through experiment and theory, that neutrons do exhibit the Goos-Hänchen effect and postulate that the associated time shift should also be observable.

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