Professor M does Science | Pure vs. mixed quantum states @ProfessorMdoesScience | Uploaded February 2021 | Updated October 2024, 1 hour ago.
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📚 Probability arises in quantum mechanics every time we perform a measurement. However, probability also features more generally in science to describe systems for which we only have partial information. In this video, we consider what happens when we have a system for which we only have partial information, but this system is a quantum system. In these cases, we need to consider both types of probability, and to do so we use pure states and mixed states.

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⏮️ BACKGROUND
Measurements | Concepts: youtu.be/u1R3kRWh1ek
Measurements | Maths: youtu.be/odLwUXKY0Js
State collapse: youtu.be/UaC-gLZ0Zvc

⏭️ WHAT NEXT?
Density operator for pure states: youtu.be/DQEtg8pWT8E
Density operator for mixed states: youtu.be/bg0SMY40q8Q

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Director and writer: BM
Producer and designer: MC