# Questions tagged [measurement]

For questions related to measurement and its effects as relevant to quantum computation and quantum information.

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### How do I get correct measurement probabilities in ZX calculus?

I'm learning ZX-calculus, but I'm getting confused when trying to obtain some simple results to compute probabilities for different outcomes. Here's a simple example where I'm getting lost. Here, <...
• 121
59 views

### Projective measurement operation in Qiskit

I would like to implement the operation $\pi = \begin{bmatrix} 1 & 0 \\ 0 & 0 \end{bmatrix}$ on qiskit but I don't know how to do that. If I use the reset ...
• 335
1 vote
35 views

### Is there an alternative algorithm to extract a probability of states of qubit after measuring?

Let a simple quantum circuit consist of one qubit and one classical bit. Initially, a qubit has the $|0\rangle$-state and then goes through some sequence of quantum gates, see the circuit below. The ...
• 111
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### Encoded Fusion Based Ring Resource State

In the article on Fusion Based Quantum Computing, they presented that a fusion of 4qubits encoded states, is creating an encoded ring resource state. My question is - when we make fusion (Type 2) to 2 ...
• 1,022
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### qiskit : how to measure multiple pauli strings

This seems like a basic operation, but I can't see how it's done in qiskit. The solution here Measuring tensor products of Pauli operators doesn't work anymore. I get an error "qiskit has no ...
• 1,266
1 vote
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### Formal measurement of the probability of an outcome of a Qubit in the hadamard base

I am fairly new to Quantum Computing and have a question which might be trivial for all of you, but I am really struggling with it. From Quantum Computation and Quantum Information I have learned, ...
1 vote