Questions tagged [logical-observables]
5 questions
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How to initialize the Surface Code in the $\pm Y_L$ State, perform logical $Y$-basis measurement, and $S$ logical gate clarification?
I am trying to learn more about logical state initialization, logical operators, and measurement for the surface code. I am having some trouble understanding the nitty-gritty details of the logical $\pm Y_L$ initialization and logical $Y$…
buddhazapha
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How does one identify Pauli logicals in a hyperbolic surface code?
I understand how the Pauli X and Z logicals on the planar surface code work - they are stringlike operators between either the rough boundaries (in case of the Z logical) or between smooth boundaries (for X logical). I choose these boundaries in…
clearski
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Measuring a single-qubit PauliZ using Qiskit's EstimatorQNN
I am currently working with the EstimatorQNN from Qiskit to construct a Quantum Neural Network using a custom Parametrized Quantum Circuit. But I want to change the observables in the EstimatorQNN.
By default, the observable returns the product of…
yeray142
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Y observable from surface code in Stim
I understand that, in the surface code, it is generally harder to measure $Y_L$ compared to $X_L$ or $Z_L$, and code deformations are generally required. However, is there an easier way to calculate this information for a Stim surface code circuit,…
jchadwick
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What is exactly Observable learning task ? How does training work in observable learning for quantum machine learning?
I'm currently learning about observable learning in quantum machine learning. I understand that the goal is often to predict the expectation value of a given observable (like a Pauli operator or a more general Hermitian matrix) with respect to some…
Iqra Bashir
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