Valentina Parigi playlist updating her research results
Wigner functions have seen increasing importance in modern quantum sciences thanks to their ability to illustrate nonclassical behavior and quantum entanglement. This makes them very important for coherent matter-wave physics, optically based frequency standards, and systems using quantum entanglement and coherence
A negative Wigner function isa quasi-probability distribution in quantum mechanics that takes on unphysical negative values, indicating the state isn't classically possible and highlights quantum features like interference or nonlocality, often appearing in superposition states (like cat states) or number states. It's a mathematical tool showing a system's quantumness, not a direct probability, as classical probabilities must be non-negative
Please watch Professor Basil J. Hiley's presentation to the Wigner Institute on noncommutativity as nonlocality in quantum physics. Prof. Valentina Parigi's focus on photon subtraction as increased nonlocality is also noncommutativity.
AI says:
The "infinite square well" (or "particle in a box") is a common introductory problem in quantum mechanics used to illustrate energy quantization. The solutions to the Schrödinger equation for a symmetric square well alternate between symmetric (cosine) and antisymmetric (sine) functions.
If you encountered the term "anti-square," it may be a colloquial or informal reference to the antisymmetric solutions of such a problem.
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