Quantum Circuit:
Observables: In quantum physics, physical properties/quantity that can be measured. eg. system’s energy, alignment of spins (for a system of spins)
http://docs.quantum.ibm.com/guides/specify-observables-pauli
https://en.wikipedia.org/wiki/Observable
https://www.quantiki.org/wiki/observables-and-measurements
https://jonathan-hui.medium.com/qc-observable-8a44d10c3f7a
EigenValues and EigenVectors:
https://www.youtube.com/watch?v=PFDu9oVAE-g&list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab
Linear Algebra – https://www.youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab
Quantum State:
Expectation Values: Expected value of the meaurement or result of an experiment; average of all possible results.
https://www.youtube.com/watch?v=8VgBPEcZ_X0
https://phys.libretexts.org/Bookshelves/Quantum_Mechanics/Essential_Graduate_Physics_-Quantum_Mechanics(Likharev)/04%3A_Bra-ket_Formalism/4.05%3A_Observables-_Expectation_Values_and_Uncertainties
Measuring expectation Values:
Unitary Gate: