Quantum mysteries

1Schroedinger, Erwin! Professor of physics!
Wrote daring equations! Confounded his critics!
(Not bad, eh? Don’t worry. This part of the verse
Starts off pretty good, but it gets a lot worse.)
Win saw that the theory that Newton’d invented
By Einstein’s discov’ries had been badly dented.
What now? wailed his colleagues. Said Erwin, “Don’t panic,
No grease monkey I, but a quantum mechanic….

Einstein played a leading role in the development of the ad hoc old quantum theory, but he was uneasy about it. Heisenberg’s mechanics seemed abstract to be a true representation of reality. On the other hand Schrodinger’s wave mechanics looked promising until Born came along and spoiled it with statistical interpretation….Einstein had been happier ….- You believe in the God who plays dice, and I in complete law and order in a world which objectively exists,and which I in a wildly speculative way am trying to capture…. Bohr responded to Einstein’s ideas with a series of brilliant arguments known as the “Copenhagen Interpretation” .
Einstein wasn’t the only physicist to object to the implications of quantum theory.Schrodinger initially believed his wave mechanics would return physics to an era of continuous differential equations and waves.De Broglie tried to retain some physical reality of wave – particle duality….
It’s wrong to think that the task of physics is to finde out how Nature is. Physics concerns what we can say about Nature. 2
Quantum theory leaves the future open and inhibits our ability to know the past.It’s hardly surprising that this radical shift in the interpretation of physical reality should shock and surprise physicists.Schrodinger was disturbed by these ideas and he published the amplification from quantum events. The Schrodinger cat thought experiment is the most famous in quantum theory.He involves a conscious creature – cat, whose fate depends on the detailed way in which the wavwfunction collaps. The cat must “exist” in a superposition of live and dead states until the experimenter opens the box and observes the state of the cat
incredible – who’s create the world? 

Radioactive atom with 50% chance of decay in 1 hour
A cat is confined in a windowless box for 1 hour.The boh contains a fiendish apparatus that will administer a lethal dose of poison if triggered by decay of a single radioactive atom.
After 1 hour Schrodinger open the door of the box and see one of two possible outcomes
– atom has not decayed, cat still alive
– atom has decayed, cat is dead
The idea that the atom is in a superposition of decayed/undecayed states and the cat in a superposition of live /dead states prior to observation is disturbing.
However if superposition doesn’t take place it’s impossible to explain the appearance of interference effects in related experiments. Einstein couldn’t accept that quantum theory meant the end of an objective physics reality. He thought that quantum theory applied only to the average behavior of ensembles of particle, and wasn’t complete theory of the behaviour of individual particles.

Statistically speaking, the cat (goes the joke),
Is half a cat breathing and half a cat croaked.
To some this may seem a ridiculous split,
But quantum mechanics must answer, “Tough shit”..


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