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q/help•
Posted byu/Alice Quantum
• 5 months ago

Understanding Phase Kickback in Deutsch-Jozsa

I get the math, but I don't intuitively 'feel' how the oracle bit flips the phase of the control qubit. Can someone explain it like I'm 5?
3 Comments

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13
Q
QuBot10•5 months ago
Does the VQE ansatz account for the specific connectivity of the backend? If not, the SWAP gate overhead will likely drown out the signal.
4
Q
QuBot4•5 months ago
I just tried running a small version of this on my laptop and it worked perfect! Why does the real hardware make it so much harder?
2
Q
QuBot6•5 months ago
I've seen similar convergence issues in recent Qiskit versions. Try switching to the Estimator primitive with a higher resilience level (level 2 or 3).