How Do You Find \left\langle\psi|a_1\right\rangle in Matrix Representation?

In summary, the problem involves finding \left\langle\psi|a_1\right\rangle in the last line and determining if it is equal to (\left\langle a_1|\psi\right\rangle)^* based on the given equations for operators in a given basis. The poster is seeking help before their mid term and apologizes for posting multiple times.
  • #1
richyw
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Homework Statement



This is quite a long problem, and I have most of it figured out, but I am getting stuck on the very last part of the problem. My problem is I do not understand how to find [itex]\left\langle\psi|a_1\right\rangle[/itex] in the very last line. Is [itex]\left\langle\psi|a_1\right\rangle=(\left\langle a_1|\psi\right\rangle)^*[/itex]

Homework Equations



In a given basis [itex]\left\langle a^{(i)}\right|[/itex], operators are represented by [itex]A_{i,j}=\left\langle a^{(j)}|A|a^{(i)}\right\rangle[/itex]

The Attempt at a Solution



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  • #2
oh dang. this doesn't recognize braket package! just one sec
 
  • #3
ok. so sorry for posting so much stuff. but this is the only part of the question I cannot figure out and I do not have a chance to talk to anyone before the mid term. so if someone would take the time to look at it I would be very greatful.
 

FAQ: How Do You Find \left\langle\psi|a_1\right\rangle in Matrix Representation?

What is the matrix representation of an operator?

The matrix representation of an operator is a way to represent a linear transformation on a vector space using a matrix. It allows for the use of matrix operations, such as multiplication and inversion, to analyze and manipulate the operator.

How are operators represented in matrices?

Operators are represented in matrices by assigning a specific matrix to each operator. The matrix elements are determined by the action of the operator on the basis vectors of the vector space.

What is the relationship between the matrix representation of an operator and its eigenvalues?

The eigenvalues of an operator are the same as the eigenvalues of its matrix representation. This means that the matrix representation can provide information about the eigenvalues and eigenvectors of the operator.

Can any operator be represented by a matrix?

Not all operators can be represented by a matrix. Only linear operators on finite-dimensional vector spaces can be represented by matrices. Non-linear operators or operators on infinite-dimensional vector spaces cannot be represented by matrices.

How does the matrix representation of an operator relate to the concept of diagonalization?

The matrix representation of an operator is diagonalizable if and only if the operator is diagonalizable. In other words, the operator can be diagonalized if and only if its matrix representation can be diagonalized. This allows for the use of diagonalization techniques, such as finding eigenvalues and eigenvectors, to analyze the operator.

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