Quantum measurement | Quantum information science

Weak value

In quantum mechanics (and computation), a weak value is a quantity related to a shift of a measuring device's pointer when usually there is pre- and postselection. It should not be confused with a weak measurement, which is often defined in conjunction. The weak value was first defined by Yakir Aharonov, David Albert, and Lev Vaidman, published in Physical Review Letters 1988, and is related to the two-state vector formalism. There is also a way to obtain weak values without postselection. (Wikipedia).

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Postselection | Projection-valued measure | Complex number | Pauli matrices | Hardy's paradox | Weak measurement | Conditional probability | Grover's algorithm | De Broglie–Bohm theory | Quantum metrology