What does it mean to be ‘quantum’? A physicist explains the basics behind Einstein’s spooky actions at a distance
A physicist explains the fundamental principles of quantum mechanics, specifically how particles can exist in multiple states or paths simultaneously until observed. This 'spooky' behavior challenges classical intuition and is the foundation for emerging quantum technologies.
Why it matters
Understanding quantum mechanics is essential for the development of future technologies like quantum computing and advanced cryptography.
In quantum entanglement, you can learn something about one particle by observing the other in its pair, even across vast distances. koto_feja/E+ via Getty Images What does it mean to be ‘quantum’? A physicist explains the basics behind Einstein’s spooky actions at a distance Published: July 15, 2026 8:12am EDT https://theconversation.com/what-does-it-mean-to-be-quantum-a-physicist-explains-the-basics-behind-einsteins-spooky-actions-at-a-distance-281844 https://theconversation.com/what-does-it-mean-to-be-quantum-a-physicist-explains-the-basics-behind-einsteins-spooky-actions-at-a-distance-281844 Link copied Share article Share article
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Imagine shining a flashlight across a dark room. You can predict exactly what the light will do: travel in a straight line from one point to another. That seems obvious, because in the world we see around us, light appears to follow a single, clear path.
Quantum mechanics paints a far stranger picture.
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