# Tag Info

## Hot answers tagged programming

### Solving quantum equation using qiskit

The paper is about the FABLE block encoding. One way to implement this in qiskit is by first using the classiq SDK package to build the model on the functional level, synthesize to a quantum program, ...
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### How to implement a quantum multiplier in Qiskit 1.0

I think that the problem is that you are passing a non-transpiled circuit to the job execution. I do not know why transpilation is not part of the run command. If ...
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Accepted

### Finding Eigenvectors of a Unitary in a Quantum circuit

You can simply use numpy: ...
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• 59.5k
1 vote

### How to implement a quantum multiplier in Qiskit 1.0

Similarly to other backends, Aer only supports a limited amount of basis gates. Thus, you have to first transpile your circuit to work with your desired backend. So, simply uncommenting the ...
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### Obtaining and Applying XX and ZZ Parity in Stim for Controlled Paulis

Stim's supported gates documentation includes the gate MXX and the gate MZZ which are exactly the two-qubit parity measurement ...
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1 vote

### The result of qiskit calculating T-depth and its calculation method

In the first figure you added barriers which prevents a transpiler from circuit optimization. This means that T-depth can be higher than in case of the circuit without barriers. On first qubit you ...
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1 vote
Accepted

### Qiskit error: too many subscripts in einsum when calling DensityMatrix.evolve(Operator)

It seems this is not a Qiskit issue but rather a limitation in the maximum number of indices the numpy.einsum function is capable of handling (max is 26, as ...
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### IBMBackendValueError: number of circuits exceeds the maximum for this backend, 300

Right, I also see no max explicit parameter capping the number of iterations in qml.AdamOptimizer(). You can always solve it 'manually' by adding a counter of ...

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