Measurement

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Measurement is an action to assess certain qualities or properties of a system or object. This is highly related to the notion of test.

Measurement and Maxwell's Demon

One can think of Maxwell's Demon(MxD) as a primitive form of measuring device. It provides two possible states that enable the observer or MxD to give a single bit of answer. In other words, every MxD is the measuring device for one bit of information in a given physical spacetime context.

Quantum Measurements

An introductory talk on quantum bits and measurements can be found here[1].

References

  1. Bäumer, Elisa (Sep 2, 2020). Qubits and Quantum States, Quantum Circuits, Measurements. local page: Qiskit. Retrieved 1 September 2021.