TED-Ed: Einstein's brilliant mistake: Entangled states - Chad Orzel

The transcript discusses Einstein's EPR paper, coauthored with Podolsky and Rosen, which introduced the concept of entangled states in quantum physics. Initially dismissed by Einstein as incomplete, the paper's ideas were later validated by John Bell's experiments, confirming quantum mechanics' correctness. The EPR paper's exploration of entanglement challenged Einstein's relativity, leading to significant advancements in quantum theory and the development of quantum information science.

What was the main focus of the EPR paper coauthored by Einstein, Podolsky, and Rosen?

• The speed of light

• Entangled states in quantum mechanics

• The photoelectric effect

• The theory of relativity

What happens to the state of a single particle in an entangled pair before it is measured?

• It is predetermined

• It is indeterminate

• It is always one

• It is always zero

How did Einstein describe the phenomenon of entanglement?

• As a scientific breakthrough

• As a complete theory

• As a philosophical footnote

• As spooky action at a distance

What was John Bell's contribution to the EPR argument?

• He supported Einstein's theory

• He discovered a new particle

• He developed a way to test the EPR argument

• He disproved quantum mechanics

What did experiments following Bell's theorem demonstrate about quantum mechanics?

• Quantum mechanics is irrelevant

• Quantum mechanics is correct

• Quantum mechanics is incomplete

• Quantum mechanics is incorrect

What potential does the field of quantum information hold?

• Proving relativity wrong

• Eliminating randomness in measurements

• Creating computers of unparalleled power

• Developing faster-than-light communication

Why can't entangled particles be used to send messages faster than light?

• Because of the speed of light limit

• Due to the randomness of measured results

• Due to the lack of technology

• Because they are not correlated