# All Questions

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### Some of the qubits are not evaluated at Qiskit

When I implement a 3-qubit circuit in Qiskit, circuit is executed smoothly at the simulator but counts I read back as results does not contain all of the qubits that are defined and included in the ...
56 views

### PhD topics in quantum computing

I am looking for PhD topics in quantum computing related to computer Engineering background (I don't have a background in physics). I tried searching for Machine learning, neural networks and Quantum ...
30 views

### Barren Plateau as a consequence of 2-desgin?

Initializing a parameterized quantum circuit with a unitary sampled from a uniform distribution (so sampling from the Haar distribution) or in a weaker form: a unitary which is a unitary 2-desgin, ...
• 121
33 views

### Expected Minimum Clique Coverage?

I'm curious if there is literature on this and, if there is, where to find it. Here I'm using clique" to mean a set of observables which all commute with each other. I also include the identity ...
• 312
26 views

### T-depth in Qiskit

How to find T-depth in Qiskit? Is there any inbuilt function or some method to find T-depth? I know that the .depth() function exists which returns circuit depth (i....
1 vote
43 views

### Qiskit: How to implement a classical function?

I'm quite lost, I have to implement the following function with qiskit $$f(x,y,z) = (\lnot x \land y \land z) \lor (x \land \lnot y \land z)$$ but how can we do that ? I don't understand how to do ...
• 87
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### qiskit qaoa.compute_minimum_eigenvalue

I am having some trouble running the compute_minimum_eigenvalue method from qiskit's QAOA: the documentation states that one ...
12 views

### Are there hardware platforms that natively implement parametric two qubit gates?

For example, is it possible to implement RXX gate with an arbitrary angle on an ion computer in a single native operation? The RXX gate with an arbitrary angle can be decomposed into two RXX gates ...
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• 173
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### Is there a relation between quantum entanglement and inclusion-exclusion principle?

If an entangled state is not simply the multiplication of each particle wave function: $$|\Psi_{ABC}\rangle \neq |\Psi_{A}\rangle|\Psi_{B}\rangle|\Psi_{C}\rangle$$ then can we apply the inclusion ...