Recent content by giants86

Homework Statement A particle is in the state 1/2 |1> - 1/2 |2> + 1/2 |3> - 1/2 |4> A detector is placed to measure state |4>. What the particle's wave function collapses into, if the detector does not find a particle Homework Equations <i|j> = delta (i, j) The Attempt at a...

You are right, thanks

have a second thought. If A's states are (1), (2), (3), (4), can't B states be a subspace of that basis, such as (1') = 1/sqrt(2) [(1) + (2)]; (2') = 1/sqrt(2) [(1)- (2)], no contribution from (3) and (4)?

Homework Statement Say I have two incompatible observables A and B. A has a finite number of base states say 4. How many base states should B have? Homework Equations Heisenberg's uncertainty AB - BA <> 0 The Attempt at a Solution I guess the answer is 4 as A and B basis states...

Homework Statement A person "A" with a watch is standing on a train station. A train (which proper length is 100ms*c) passes him with a speed of 3/5c. A person "B" sitting on the front of the train synchronizes his watch with the "A" (both set to 0) when he passes him. At the same time he...

Let me clarify my question. I have two frames that are moving with the accelerations against an inertial frame, therefore one frame moves with a constant speed against another. Can I use Lorentz transformations between these two frames?

Are Lorentz transformations only work between inertial frames? if so, is there a simple counter-example e.g. for them not to work?