Quantum Physics

Quantum mechanics
Quantum mechanics (wikipedia.org)

Quantum mechanics is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles. It is the foundation of all quantum physics including quantum chemistry, quantum field theory, quantum technology, and quantum information science.

Classical physics, the collection of theories that existed before the advent of quantum mechanics, describes many aspects of nature at an ordinary (macroscopic) scale, but is not sufficient for describing them at small (atomic and subatomic) scales. Most theories in classical physics can be derived from quantum mechanics as an approximation valid at large (macroscopic) scale.

Quantum mechanics differs from classical physics in that energy, momentum, angular momentum, and other quantities of a bound system are restricted to discrete values (quantization); objects have characteristics of both particles and waves (wave–particle duality); and there are limits to how accurately the value of a physical quantity can be predicted prior to its measurement, given a complete set of initial conditions (the uncertainty principle).

Quantum mechanics arose gradually from theories to explain observations that could not be reconciled with classical physics, such as Max Planck's solution in 1900 to the black-body radiation problem, and the correspondence between energy and frequency in Albert Einstein's 1905 paper, which explained the photoelectric effect. These early attempts to understand microscopic phenomena, now known as the "old quantum theory", led to the full development of quantum mechanics in the mid-1920s by Niels Bohr, Erwin Schrödinger, Werner Heisenberg, Max Born, Paul Dirac and others. The modern theory is formulated in various specially developed mathematical formalisms. In one of them, a mathematical entity called the wave function provides information, in the form of probability amplitudes, about what measurements of a particle's energy, momentum, and other physical properties may yield.

Source: Quantum mechanics (wikipedia.org)

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The First Quantum Field Theory | Space Time

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What Does an Electron Look Like?

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The Ultraviolet Catastrophe Experiment

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Could the Higgs Boson Lead Us to Dark Matter?

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Zeno's Paradox & The Quantum Zeno Effect

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What Happens Inside a Proton?

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Feynman's Infinite Quantum Paths

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How the Higgs Mechanism Give Things Mass

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Quantum Locking Will Blow Your Mind—How Does it Work?

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Large hadron collider: A revamp that could revolutionise physics

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What If Charge is NOT Fundamental?

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Will We Discover Cosmic Strings From the Big Bang?

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What is the quantum apocalypse and should we be scared?

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Is The Future Predetermined By Quantum Mechanics?

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Einstein’s special theory of relativity combines space and time into one dynamic, unified entity - spacetime. But if time is connected to space, could the univ

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Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Quantum mechanics has a lot of weird stuff - but there’s thing that everyone agrees that no one understands. I’m talking about quantum spin. Let’s find out how chasing this elusive little behavior

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This result could change physics forever

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Electroweak Theory and the Origin of the Fundamental Forces

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Navigating with Quantum Entanglement

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An atomic marker hidden in plain sight

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Teleportation breakthrough made

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Team's quantum object is biggest by factor of billions

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Quantum trick for pressure-sensitive mobile devices

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Quantum mechanics rule 'bent' in classic experiment

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Majorana particle glimpsed in lab

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Imaginary time

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How long is a piece of string?

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Higgs boson 'hints' also seen by US lab

A US particle machine has seen possible hints of the Higgs boson, it has emerged, after reports this week of similar glimpses at Europe's Large Hadron Collider (LHC) laboratory.The Higgs boson sub-atomic particle is a missing cornerstone in the accepted theory of particle physics.

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Antimatter Tevatron mystery gains ground

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Quantum Leap: Information Teleported between Ions at a Distance

Quantum entanglement, whereby two or more objects are linked by an unseen connection, has some famously spooky effects. As quantum researcher Anton Zeilinger has said, entanglement can be thought of as a pair of dice that always land on the same number.

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Bridging the gap to quantum world

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Antihydrogen undergoes its first-ever measurement

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