1. Mar 25, 2012

phoenixnitc

What is the physical basis for the requirement that the wave function has finite and continuous first order derivative?

2. Mar 25, 2012

tom.stoer

b/c only then it carries finite momentum and energy in a finite interval

$$\int_{x-\epsilon}^{x+\epsilon}dy\,\psi^\ast\,(i\partial_y)\,\psi$$

$$\int_{x-\epsilon}^{x+\epsilon}dy\,\psi^\ast\,(-\partial^2_y)\,\psi$$

3. Mar 26, 2012

phoenixnitc

Thank you.That really helped me a lot.

4. Mar 26, 2012

phoenixnitc

Why don't we feel the rotation of the earth when we observe it from a helicopter?

5. Mar 26, 2012

phoenixnitc

Has "D-WAVE Systems" really developed a quantum computer?

6. Mar 26, 2012

phoenixnitc

Is there any branch of physics that deals with the neural networks in the brain?

7. Mar 26, 2012

lostprophets

a particle and/or a wave ?
does darkness move at the speed of light?
does light move at the speed of darkness?
does light really bend around corners or is it pulled around by darkness?
in a dark universe, does the universe expand when light appears?
does light "push" darkness away ?