Quantum measurements is one of the most important topics when starting to study quantum mechanics. In the context of quantum computing, many (theoretical) algorithms consist of measurements in the X, Y, or Z basis. But how do we perform these measurements in experiments?
- Measurement operators
- Bra-ket notation
In the video, Ben Criger shows how the current has a significant bump before arriving at the place where there is a state-dependent current. Do you think that the height of this first peak (which is independent of the spin state) matters? Why does it (not) matter?
If you are interested in more examples of measurements on qubits in real experiments, take a look at the corresponding section on this platform: Quantum computer.