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Quantum_Operators_Mouse

# Quantum_Operators_Mouse - Quantum operator methods...

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Quantum operator methods – QM (quantum mouse) version p. 1 SETUP: Consider a quantum object (a "quantum lab mouse") and some new properties we can measure. E.g., suppose "quantum weight", W , is a hermitian operator. The corresponding physical measurement is "put the mouse on a quantum scale". Interestingly, this scale reads either 1 (skinny mice) or 10 (heavy ones), but nothing else (!) W| > = | > , W| > = 10| > . (Because I'm no artist, I will simplify the icons for skinny and heavy mice to and respectively) Note! Being skinny or heavy is normal. In fact, let us assume it is ortho normal (and complete) Stare at these two eigen-equations and make sure you, and your group, understand the notation: which symbols are the eigenvectors here, what are the eigenvalues, in those equations? What can you say about, e.g. ? (Explain) "Quantum happiness", H , is also Hermitian. The corresponding physical measurement is "look at the mouse's expression", yielding either a smile (happiness = +1), or frown (happiness = -1) | > = | > , but | > = -| > H H Note! Being happy or sad is normal . (Again, orthonormal, and complete) Again, make sure you follow this notation: what are the possible outcomes of a measurement of H? Which symbols are the eigenvectors here, what are the eigenvalues? (Note that "H" in this Tutorial has nothing to do with a Hamiltonian, sorry for the common letter)

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• Fall '08
• STEVEPOLLOCK
• Physics Education Group, S. Pollock, Education Group University, Physics Education Group University of Colorado, Quantum operator methods

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