Recent content by victorphy

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    Graduate Wave packet moving in a magnetic field

    Hi, everyone! I'm thinking of a problem how a wave packet moves in a constant magnetic field. I want to solve it by numerical calculation.First,I initiate it as a Gauss wave packet. What I understand is it will circle in the magnetic field as time goes by,and it will diffuse at the same time...
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    Graduate Breaking Down the Uncertainty Principle

    I think you can take a look at some books on QM,like Sakurai's.
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    Graduate Particle In a finite potential well

    Why?I don't understand that wave function can't penetrate the wall can resuilts in definite kinetic energy.
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    Graduate Zero points of particle wave function?

    A free particle is in a momentum eigenstate,i.e. it has a definite momentum which doesn't change with time.According to uncertainty principle, the uncertainty of position must be infinite.That is you can find the particle everywhere with the same probability.
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    Graduate Wave function of Stationary State

    NO,the equal proabability of finding the electron anywhere means the electron is in a momentum eigenstate.However an electron revolving round the nucleus is effected by a potential,so its momentum doesn't commute with the Hamiltonnian.That means although the electron is just in stationary...
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    Graduate Understanding Bose-Hubbard Model: Senior Guide

    Well,thanks a lot.
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    Graduate Understanding Bose-Hubbard Model: Senior Guide

    About the article I mentioned above,I know I have to learn more to get it right,like advanced QM,statistic physics,field theory and so on.What I want to know is if there are some articles on the same topic but more easier to understand.Or what I have to learn first if I have to finish that...
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    Graduate Understanding Bose-Hubbard Model: Senior Guide

    Thanks for your explanation. I am interested,what will happen in this situation?
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    Graduate Understanding Bose-Hubbard Model: Senior Guide

    Would anyone help explain Bose-Hubbard Model for me?More detailed,more helpful. Besides,I am trying to read a paper named Boson localization and the superfluid-insulator transition,but I find I can hardly understand it.What can I do if I want to access to as more knowledge as possible? I am a...
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    High School Is electric electrons and protons?

    No.By convention,we postulate that it is positive charges that move in an electric circuit and create an electric current，thus charges move in the same direction just as the current.
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    Graduate What is the Nature of Material Waves in Quantum Mechanics?

    It is easier to understand if you regard the wave just as an imagination,it tells us where a particle will be when we try to find it,i.e in this case a particle just acts as a wave.But It does not really exist,I think.