How to Find the Conjugate of a Complex Exponential Function?

In summary, the conjugate of \varphi=exp(-x^2/x_0^2) is \varphi*=exp(-x^2/x_0^2). However, this solution is only correct if (x/x0)^2 is purely imaginary. If x and x0 are both real, then the conjugate of exp(x) is exp(x).
  • #1
noblegas
268
0

Homework Statement



Find the conjugate of

[tex] \varphi[/tex]=[tex]exp(-x^2/x_0^2)[/tex]

Homework Equations





The Attempt at a Solution




Isn't the conjugate [tex] \varphi[/tex]*=[tex]exp(x^2/x_0^2)[/tex]
 
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  • #2
noblegas said:

Homework Statement



Find the conjugate of

[tex] \varphi[/tex]=[tex]exp(-x^2/x_0^2)[/tex]

Homework Equations


The Attempt at a Solution

Isn't the conjugate [tex] \varphi[/tex]*=[tex]exp(x^2/x_0^2)[/tex]

Not if x and x0 are real, which I suspect they are. What is it in that case?
 
Last edited:
  • #3
Dick said:
Not if x and x0 are real, which I suspect they are. What is it in that case?

oh ,my solution would only be correct if x/x0 is imaginary.would my expression
[tex]
exp(-x^2/x_0^2)
[/tex] not change when taking its conjugate??
 
  • #4
noblegas said:
oh ,my solution would only be correct if x/x0 is imaginary.would my expression
[tex]
exp(-x^2/x_0^2)
[/tex] not change when taking its conjugate??

Right, sort of. If x is imaginary the conjugate(exp(x))=exp(-x). If x is real then conjugate(exp(x))=exp(x). But your solution is only correct if (x/x0)^2 is purely imaginary.
 
  • #5
Dick said:
Right, sort of. If x is imaginary the conjugate(exp(x))=exp(-x). If x is real then conjugate(exp(x))=exp(x). But your solution is only correct if (x/x0)^2 is purely imaginary.

but x/x0 is not purely imaginary , but completely real. So my expression would remain the same when taking its conjugate
 
  • #6
noblegas said:
but x/x0 is not purely imaginary , but completely real. So my expression would remain the same when taking its conjugate

Yesss.
 

1. What is a conjugate in terms of psi?

A conjugate of psi refers to the mathematical operation of finding the complex conjugate of the wave function psi. This is done by changing the sign of the imaginary component of psi.

2. Why is it important to find the conjugate of psi?

The conjugate of psi is important in quantum mechanics as it is used in calculating the probability of finding a particle in a specific location. It is also used in finding the expectation value of a particle's position or momentum.

3. How do you find the conjugate of psi?

To find the conjugate of psi, you simply need to change the sign of the imaginary component of the wave function. If psi is written as psi(x) = A(x) + iB(x), then the conjugate of psi would be psi*(x) = A(x) - iB(x).

4. Can the conjugate of psi be a complex number?

Yes, the conjugate of psi can be a complex number. This is because the wave function psi itself is a complex number, so its conjugate will also be a complex number.

5. Is the conjugate of psi always necessary in quantum mechanics?

No, the conjugate of psi is not always necessary in quantum mechanics. It is only needed in certain calculations, such as finding the probability of a particle's position or momentum. In other cases, it may not be relevant or needed.

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