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Two-state quantum system

Ciro Santilli (@cirosantilli, 37) ... Physics Particle physics Quantum mechanics Non-relativistic quantum mechanics Schrödinger equation Solutions of the Schrodinger equation
Updated 2025-07-16  1 By others on same topic  0 Discussions Create my own version
Discrete quantum system model that can model both spin in the Stern-Gerlach experiment or photon polarization in polarizer.
Also known in quantum computing as a qubit :-)
  • Table of contents
    • Bloch sphere Two-state quantum system
    • Pauli matrix Two-state quantum system

Bloch sphere

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Two-state quantum system
physics.stackexchange.com/questions/204090/understanding-the-bloch-sphere/598254#598254
A more concrete and easier to understand version of it is the more photon-specific Poincaré sphere, have a look at that one first.

Pauli matrix

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Two-state quantum system
2D representation of SU(2).

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