Which scientist is famous for a thought experiment about a cat in a box?
AnswerErwin Schrödinger
Schrödinger's cat illustrates the puzzle of superposition in quantum mechanics.
Science · Facts & stats
Quantum facts & stats
7 fact-checked facts about quantum physics and quantum computing, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is the basic unit of quantum information called?
AnswerQubit
A qubit is the quantum version of a classical bit.
Going deeper
What does the Heisenberg uncertainty principle limit?
AnswerHow precisely position and momentum can be known together
The more precisely one is known, the less precisely the other can be.
Einstein's 1921 Nobel Prize in Physics was awarded mainly for what?
AnswerExplaining the photoelectric effect
His explanation of the photoelectric effect treated light as quanta.
Which phrase did Einstein use to describe quantum entanglement?
AnswerSpooky action at a distance
Einstein was uneasy with entanglement and called it spooky action at a distance.
Expert level
What is the approximate value of Planck's constant?
Answer6.626 x 10^-34 joule-seconds
Planck's constant is about 6.626 x 10^-34 J·s; the others are light speed, gravity and electron charge.
Shor's algorithm lets a quantum computer efficiently solve which problem?
AnswerFactoring large integers
Shor's 1994 algorithm factors integers far faster than known classical methods.
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