# Tag Info

### quantum generalisation of random variables

If I understand your question, the way a classical random variable $X$ with support $\left[2^n\right]=\left\{0,\cdots,2^n-1\right\}$ is represented in quantum information is via a diagonal density ...
1 vote

### Is there a general method for calculating expectation values for time-dependent wavefunctions?

I won't give the final answer (close to it), but instead try and point you in the general direction. Initial State: The given initial state is $| \psi(t=0) \rangle = | 0 \rangle$. Pauli X Matrix: ...
1 vote
Accepted

### How to know what eigenvalue corresponds to measurements of individual qubits in a multiqubit system?

If you consider the state $$\Omega_- = \frac{1}{\sqrt{2}}(|00\rangle + |11\rangle).\tag{1}$$ you will find that there is NO violation. Let me show this. Note that the approach I will use for solving ...
1 vote

### How to know what eigenvalue corresponds to measurements of individual qubits in a multiqubit system?

From your current description, it seems that you have found each eigenvector $\{|v_1\rangle,...,|v_4\rangle\}$ and its associated eigenvalue $\lambda_1,...,\lambda_4$. These eigenvalues represent the ...

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