What Does It Mean?. From the “Afterword” of D J Griffith’s Introduction to Quantum Mechanics. Da Big Question. Did the physical system “actually have” the eigenvalue in question prior to the measurement? ( REALIST ) OR
From the “Afterword” of D J Griffith’s Introduction to Quantum Mechanics
Where rho is the probability density of k
Now let’s eliminate B(b,k) by using our correlation function
A cat is placed in steel chamber, together with the following hellish contraption: In a Geiger counter there is a tiny amount of radioactive material so tiny that maybe within 1 hour one of the atoms decays but equally probable none of them decays. If one decays then the counter triggers and via a relay activates a little hammer which breaks a container of cyanide. If one has let this entire system for one hour, then one would say the cat is living if no atom has decayed. The first decay would have poisoned it. The wave function of the entire system would express this by containing equal parts of the living and dead cat. At then end of an hour, the wave function of the cat has the form of
I refuse to answer.