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quantum mechanics

Illustration for thermodynamics
Abstractions blog

Quantum Correlations Reverse Thermodynamic Arrow of Time

A recent experiment shows how quantum mechanics can make heat flow from a cold body to a hot one, an apparent (though not real) violation of the second law of thermodynamics.

Photo of Stephen Hawking in 1979 in Princeton, New Jersey.
Abstractions blog

Why Stephen Hawking’s Black Hole Puzzle Keeps Puzzling

The renowned British physicist, who died at 76, left behind a riddle that could eventually lead his successors to the theory of quantum gravity.

An illustration of gravity as particles
gravity

Physicists Find a Way to See the ‘Grin’ of Quantum Gravity

A recently proposed experiment would confirm that gravity is a quantum force.

Quantum reconstruction
quantum mechanics

Quantum Theory Rebuilt From Simple Physical Principles

Physicists are trying to rewrite the axioms of quantum theory from scratch in an effort to understand what it all means. The problem? They’ve been almost too successful.

Tim Maudlin
Q&A

A Defense of the Reality of Time

Time isn’t just another dimension, argues Tim Maudlin. To make his case, he’s had to reinvent geometry.

Illustration: balloon modelling as a metaphor for entanglement
insights puzzle

Solution: ‘Taming Quantum Weirdness’

A simple analogue could offer insights into one of the most astonishing results of quantum mechanics.

2D knots illustration by James O'Brien
Quantized Columns

Inside the Knotty World of ‘Anyon’ Particles

A new class of quantum particle is about to emerge from the tangled considerations of quantum statistics.

Illustration: balloon modelling as a metaphor for entanglement
insights puzzle

How to Tame Quantum Weirdness

Can balloon animals help blunt uneasy feelings about “spooky action at a distance”?

Particle measurement GIF illustration
quantum mechanics

Experiment Reaffirms Quantum Weirdness

Physicists are closing the door on an intriguing loophole around the quantum phenomenon Einstein called “spooky action at a distance.”