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Force in a Vacuum
The world of nanoparticles can be very different from the world we see. For starters, it’s already unique in terms of mass — these objects are tiny — but more than that, the nano world is governed by a different set of physical laws, which we have taken to calling quantum physics. Many of the interactions that take place in this nano realm can be difficult to spot, and one such elusive phenomenon is the subject of a study by an international team of researchers led by Alejandro Manjavacas, assistant professor in the Department of Physics & Astronomy at the University of New Mexico (UNM).
In a paper published in the journal Physical Review Letters, the researchers observed what’s known as the Casimir effect, a force found between quantum objects inside a vacuum due to fluctuations of electromagnetic waves. When viewed through the paradigm of classical physics, the force can’t be seen. Researchers have to apply quantum field theory to spot it.
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The experiment found that some particles decay less often than expected under a particular set of circumstances, and researchers are now working to determine if this is sign of new physics phenomena, or simply a statistical error.
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In the Standard Model, this property predicts that 'up to a small and calculable effect due to the mass difference, electron and muons should be produced with the same probability in this specific B0 decay.’
But, in the LHCb experiment, the researchers found that decays involving muons were less frequent.
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...The anomaly was detected in the entire data sample from the Run 1 of the Large Hadron Collider, and if seen in the data from Run 2, it could suggest physics beyond the Standard Model.
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originally posted by: ElectricUniverse
The world of nanoparticles can be very different from the world we see. For starters, it’s already unique in terms of mass — these objects are tiny — but more than that, the nano world is governed by a different set of physical laws, which we have taken to calling quantum physics.
originally posted by: ElectricUniverse
a reply to: moebius
They are two anomalies, instead of creating separate threads i added them together, and emphasized these are separate anomalies. Also explained that the second one had to be verified. It still worth it as news.
Seems like you contradict yourself here since you reference only occurs "when viewed through the paradigm of classical physics."and "only when the quantum field theory is applied" because classical physics and quantum field theory are two different things so how can it be "only" both of them? According to this paper Casimir forces are quantum forces and don't require "viewing through the paradigm of classical physics".
originally posted by: ElectricUniverse
This mysterious "Casimir effect" only occurs "when viewed through the paradigm of classical physics." only when the quantum field theory is applied can researchers see this effect.
Casimir effects can be formulated and Casimir forces can be computed without reference to zero point energies. They are relativistic, quantum forces between charges and currents.
originally posted by: AutonomousMeatPuppet
The Casimir effect has been measured between plates, as the diagram portrays, some time ago.
This is a bit different.. a spinning atom produces a lateral force, to move along a plate. The direction is changed by the distance between atom and plate.
originally posted by: AutonomousMeatPuppet
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This is a bit different.. a spinning atom produces a lateral force, to move along a plate. The direction is changed by the distance between atom and plate.
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Manjavacas believes that the knowledge gained from his team’s research, such as the discovery that the lateral Casimir force’s direction can be controlled by changing the distance of a particle to a surface, can help nanotech engineers design better nanoscale objects for computing, healthcare, and other applicable areas of research.
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