How to do a POVM measurement of a quantum state in IBM's Quantum Composer?

Asked Mar 06 '21 at 16:17

Active Mar 08 '21 at 11:19

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I'm new to IBM, so I'm still figuring things out. I want to make a POVM measurement of a quantum state for state discrimination purposes. In other words I want a measurement that has three outcomes:

A: It's state A with 100 % certainty (or x %) B: It's state B with 100 % certainty (or x %) C: Can't determine if it's state A or B.

Can anyone help with how to do this in IBM's Quantum Composer?

edited Mar 08 '21 at 11:14

glS

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asked Mar 06 '21 at 16:17

Camilla

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The general idea is that you have to dilate your POVM into a projective measurement, as described in the Wikipedia article. An specific implementation for a quantum computer using qubits is described in this exercise sheet. – Mateus Araújo Mar 08 '21 at 13:02

How to do a POVM measurement of a quantum state in IBM's Quantum Composer?

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