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It is the conjugate transpose of the matrix. Of course the conjugate parts only matters with complex entries. So here is a definition:
A unitary matrix is a square matrix U whose entries are complex numbers and whose inverse is equal to its conjugate transpose U*. This means that
U*U = UU* = I. Where I is the identity matrix.
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Why only complex numbers are used in unitary matrix?
It looks like that's part of the definition of a unitary matrix. See related link, below.
Why must the CKM matrix be unitary?
Unitary matrices leave the expectation value unchanged. We need the mixing matrix to be unitary (to preserve the mixed quarks as a basis, to preserve length); if VCKM were not unitary, it would perhaps suggest that a fourth generation of quarks needed to be considered or included.
What is payroll matrix?
can anyone give me an exact definition of payroll matrix................
What is the definition of identity matrix?
Identity or Unit Matrix If in the scaler matrix the value of k=1, the matrix is called the identity or unit matrix. It is denoted by I or U.
What is the definition of Uper-triangular matrix?
Uper-triangular Matrix A square matrix A whose elements aij=0 for i>j is called upper triangular matrix.
