Find Hamiltonian Value of 4x4 Matrix

In summary, to find the value of the attached 4x4 matrix, one can use the Hermitian method to get eigen-values, assuming that γ1 is small. This method involves diagonalizing the matrix by assuming it is a rotation of a diagonal matrix by some angle theta, solving for that angle for each 2x2 block, and performing rotations to see the effect on off-diagonal terms. Perturbation theory can then be used to get an estimate. Another option is to use γ1 as a pivot and see if it results in a block-diagonal matrix. The Jacobi Method or a variation of it can also be used.
  • #1
vinothr
8
0
could you help me how to find the value of the attached 4x4 matrix.Could you give me the idea or which method i have to follow to get the value of that matrix.
 

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  • #2
I'm assuming you want eigen-values. It's Hermitian and almost block-diagonal. Assuming γ1 is small, you should be able to get a good estimate, if not exact answer. A two-by-two Hermitian matrix can be diagonalized exactly by assuming that it is a rotation of a diagonal matrix by some angle theta. Solve for that angle for each of the 2x2 blocks, perform the rotations, and see what it does to your off-diagonal terms. Odds are, you'll end up with some factors proportional to γ1 scattered around. From there, your best bet is probably to go with perturbation theory to get an estimate.

Edit: Might be worth a try to use γ1 as your pivot and seeing if that leaves you with a block-diagonal matrix, but I somehow doubt it.
 
  • #3
thanks for your reply.i will try Hermitian method to get eigen-value of the matrix.
 
  • #4
It's Jacobi Method. Or at least a variation. If you read up on Jacobi Method, you should be able to figure out what to do with this one.
 
  • #5
thanks friend.i solved the matrix.
 

FAQ: Find Hamiltonian Value of 4x4 Matrix

What is a Hamiltonian value?

A Hamiltonian value is a mathematical quantity used in the field of physics to describe the total energy of a system. It is named after the physicist and mathematician William Rowan Hamilton.

How do you find the Hamiltonian value of a 4x4 matrix?

To find the Hamiltonian value of a 4x4 matrix, you will need to use a specific formula that takes into account the values of the matrix and their corresponding positions. This formula is known as the Hamiltonian operator and involves performing operations on the matrix, such as multiplication and addition.

Why is finding the Hamiltonian value important?

The Hamiltonian value is important because it allows us to understand the behavior and dynamics of a physical system. It can also help us make predictions about the system's future states and how it will respond to different inputs. Additionally, the Hamiltonian value is a fundamental concept in many areas of physics, such as quantum mechanics and classical mechanics.

What are some real-world applications of finding the Hamiltonian value?

The Hamiltonian value has many real-world applications, particularly in the fields of physics and engineering. It is commonly used in studying the behavior of complex systems, such as particles in a magnetic field or the motion of celestial bodies. It also has applications in quantum computing, where it is used to calculate the energy levels of a quantum system.

Are there any limitations to finding the Hamiltonian value of a 4x4 matrix?

Yes, there are some limitations to finding the Hamiltonian value of a 4x4 matrix. One limitation is that the formula for the Hamiltonian operator is specific to 4x4 matrices, so it cannot be applied to matrices of different sizes. Additionally, finding the Hamiltonian value may not always be possible or practical for extremely large or complex systems.

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