The probability functional description of a wave

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Discussion Overview

The discussion revolves around the relationship between classical wave equations and quantum mechanical wave functions, specifically questioning how the probability function for particles like electrons can be justified in the context of classical physics principles such as Newton's laws and energy conservation.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that the classical wave equation can be derived from Newton's laws and energy conservation, while questioning how the quantum mechanical wave function can be similarly justified.
  • Another participant expresses confusion regarding the original question and the connection between classical and quantum descriptions.
  • A participant mentions the correspondence principle, implying that adjustments are necessary when transitioning from classical to quantum mechanics.
  • There is a discussion about the lack of a definitive law that explains how adjustments are made in quantum mechanics, with one participant noting that many quantum principles do not align with classical physics but yield correct results through experience.
  • A later reply offers encouragement to a participant who feels overwhelmed by studying quantum mechanics, emphasizing the nature of scientific inquiry as involving failure and persistence.
  • Another participant requests recommendations for books on conceptual problems in quantum mechanics to enhance understanding and skills.
  • A suggestion is made for specific textbooks and resources for studying quantum mechanics, noting that some recommended texts may not contain many problems.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and confusion regarding the transition from classical to quantum mechanics, with no consensus on how to justify the quantum wave function in relation to classical principles. Multiple competing views and uncertainties remain throughout the discussion.

Contextual Notes

The discussion highlights the complexities and uncertainties involved in transitioning from classical to quantum mechanics, including the lack of clear laws governing this adjustment and the reliance on empirical results rather than theoretical consistency.

Who May Find This Useful

Individuals interested in the philosophical and conceptual underpinnings of quantum mechanics, as well as those seeking resources for studying quantum mechanics and its foundational principles.

peeyush_ali
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it could be by the power of Newton's laws and energy conservation principles, one can sort out the equation of a wave classically...
y=a exp(-iw(t-x/v) ) ; ----1.
in the quantum domains where classical situations are ruled out, how is it apt to say or on which basis can we say that,

psi(x)=a exp(-iw(t-x/v)) ;-------2.

psi(x) is the probability function of finding umm may be an electron..

PS: what all i want is... Newton's laws n energy cons. principles concludes eqn 1.

but how passionately can 2. be justified!

thanks in advance..
 
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I can't decipher what you're asking / talking about.
 
zhermes said:
I can't decipher what you're asking / talking about.

lol... i was just trying to know that "how mysteriously" can the probability function
psi(x) = a exp(-iw(t-x/v) ) (all symbols have their usual meanings)
be written , which describes the statistical description of particles such as photons, electrons, etc., as a function of time, position etc.,

while , y (displacement of a particle) = a exp(-iw(t-x/v)) can be derived (classically) using the Newton's laws and principle of conservation of energy..
 
are u talking about QM complications? I mean we have the correspondance principle but when we enter QM we need to adjust, is that what ur saying?
 
y.moghadamnia said:
are u talking about QM complications? I mean we have the correspondance principle but when we enter QM we need to adjust, is that what ur saying?

yes...! why do we need to "adjust"... what is the law which could justifies this "adjustment" we do? it cant' be just like that simply right!
 
well, I am not so sure about ur question but there is no certain law to tell us how exactly we adjust in QM or such, while moving from classical physics.we need to work with eyes wide open and we need to get it right, in QM so many things are not correct according to the physics principles. but we use them because they give us the right results, that we gain from experience.
 
y.moghadamnia said:
well, I am not so sure about ur question but there is no certain law to tell us how exactly we adjust in QM or such, while moving from classical physics.we need to work with eyes wide open and we need to get it right, in QM so many things are not correct according to the physics principles. but we use them because they give us the right results, that we gain from experience.

thanks a lot! atleast I am less depressed ...i just begin my study of qm...
 
why would u be depressed at all? physics is about failing more and winning less, all sciences are, and what we truly do is never quit. good luck!
 
:) true! ..
can u suggest me some book of conceptual problems on QM to improve skill and also understanding in QM..?
thanks in advance
 
  • #10
well, yeah, of course, my favorite textbook is QM by shankar, its a great one but doesn't have many problems.u can also use books by Zettili, byron and shaums problems.
u can go to www.library.nu[/URL] and after registration u can search all the QM books and also download 'em.
good luck!
 
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