50q/debugging•u/Alice JohnsonMENTOR• 7 months agoHELPHelp! Runtime error 'Qubit already measured'Is there a way to do mid-circuit measurements and then feed-forward in the current IBM primitives? I keep getting state preparation errors.3 CommentsShareReport
104q/debugging•u/Rihaan Shah• 7 months agoGUIDECommon Pitfalls: Forgetting to TranspileI spent 3 hours wondering why my gate counts were so high. Turns out I was running a surface code without mapping it to the backend's heavy-hex coupling map.3 CommentsShareReport
32q/debugging•u/Alice Quantum• 7 months agoHELPMy VQE won't converge - help with noise models!I'm trying to run a Variational Quantum Eigensolver (VQE) for $H_2$ on a noisy backend, but the energy minimum keeps drifting. I suspect it's the Readout Error. Here's my ansatz setup: ```python from qiskit.circuit.library import EfficientSU2 ansatz = EfficientSU2(2, reps=1) # ... optimization loop ... ``` Has anyone had success with Error Mitigation techniques like PEC or ZNE for this?3 CommentsShareReport