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Math 401, Topic 6: Postulates of quantum theory and measurement operations

Section 1: Postulates of quantum theory

This part is a review of the quantum theory, I will keep the content brief.

If you are familiar with the linear algebra defined before, you can jump right into this section to keep your time as viewing those compact notations.

Pure states

Composite systems

Mixed states and density operators

Density operator of subsystems

State purification

Observables

Effects and Busch's theorem for effect operators

Measurements

Quantum operations and CPTP maps

Conditional operations

Section 2: Quantum entanglement

Bell states and the EPR phenomenon

Von Neumann entropy and maximally entangled states

Section 3: Information transmission by quantum systems

Transmission of classical information

Making use of entanglement and local operations

Superdense coding [very important]

Section 4: Quantum automorphisms and dynamics