Measurement in quantum mechanics
In quantum physics, a measurement is the testing or manipulation of a physical system to yield a numerical result.
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mechanism for detecting eavesdropping attempts
The act of measurement is central to quantum cryptography because it forces the quantum system into a definite state, revealing the presence of an observer.
terminates the superposition of a quantum state
Measurement forces a system in a superposition of multiple basis states to collapse into one of those states with a specific probability.
collapses the qudit state into a single outcome
Measuring a qudit results in the collapse of its superposition into one of its d possible basis states, with probabilities determined by the state coefficients.
acts as the final stage of a quantum circuit
Measurements collapse the quantum state of the qubits into classical bits, providing the output of the quantum computation.