Measurements and Quantum Information

Publication year: 2012
Source: Classical and Quantum Information, 2012, Pages 133-220

Dan C., Marinescu , Gabriela M., Marinescu

 Summary: The second chapter of the book starts with basic concepts pertinent to the measurements of quantum systems including the relationship between measurements and physical reality in light of the Copenhagen interpretation of quantum mechanics, the density operator, and the purification of mixed states. Then it covers quantum measurements and presents the Born rule, projective and POVM measurements, Neumark and Gleason theorems. The third broad is the entanglement. After a discussion of the monogamy of entanglement, the chapter covers the EPR experiment, hidden variables, Bell and CHSH inequalities, and quantum correlations.Key WordsDensity operator, pure state; mixed state, entanglement, von Neumann measurements;…