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Quantum Physics
What would become the Big Bang model started from a crucial idea: that the young Universe was denser and hotter.
You are an energy field — but not the “chakras” or “auras” kind.
Though he renounced philosophy, Stephen Hawking's final theory of the universe redraws the basic foundations of cosmology.
The double-slit experiment, hundreds of years after it was first performed, still holds the key mystery at the heart of quantum physics.
Our huge, expanding Universe may truly be infinite. But if the set of possible quantum outcomes is also infinite, which "infinity" wins?
What do we mean by a black hole's size? A photon sphere? The minimal stable orbit? The event horizon? The singularity? Which one is right?
Two very different ideas, wormholes and quantum entanglement, might be fundamentally related. What would "ER = EPR" mean for our Universe?
Even with quantum teleportation and the existence of entangled quantum states, faster-than-light communication still remains impossible.
If you're a massless particle, you must always move at light speed. If you have mass, you must go slower. So why aren't any neutrinos slow?
Protons and neutrons are held together by the strong force: with 3 colors and 3 anticolors. So why are there only 8 gluons, and not 9?
The answer to the age-old philosophical question of whether there is meaning in the Universe may ultimately rest upon the power of information.
John Templeton Foundation
Though quantum mechanics is an incredibly successful theory, nobody knows what it means. Scientists now must confront its philosophical implications.
Experiments tell us quantum entanglement defies space and time.
When you bring two fingers together, you can feel them "touch" each other. But are your atoms really touching, and if so, how?
In Einstein's relativity and the Standard Model, we only have three spatial dimensions. But there could be more, and many think there are.
Einstein tried to disprove quantum mechanics. Instead, a weird concept called entanglement showed that Einstein was wrong.
The central equation of quantum mechanics, the Schrödinger equation, is different from the equations found in classical physics.
Quantum superposition challenges our notions of what is real.
The quantum world — and its inherent uncertainty — defies our ability to describe it in words.
Quantum mechanics has taught us that even empty space contains energy. "Negative energy" is the state of having less energy than empty space.
For nearly a century, physicists have argued over how to interpret quantum physics. But reality exists independent of any interpretation.
Every proton contains three quarks: two up and one down. But charm quarks, heavier than the proton itself, have been found inside. How?
Light carries with it the secrets of reality in ways we cannot completely understand.
The science fiction dream of a traversable wormhole is no closer to reality, despite a quantum computer's suggestive simulation.
Like Dua Lipa, he had to create new rules.
The answer to this question is key to understanding why anything exists.
The quantum world is one in which rules that are completely foreign to our everyday experience dictate bizarre behavior.
Quantum entanglement may remain spooky, but it has a very practical side.
We are not yet at the point where quantum communications can be deployed to secure the internet, but we might not be far off.