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For any questions whose answer is expected to require code or programming notions. For questions about a specific framework (e.g. qiskit or cirq) please also include a more specific tag. If your question is about installation or any specific framework error, consider posting it in https://stackoverflow.com/ instead.

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Define customized excitation for the unitary coupled-cluster (UCC) algorithm in qiskit

It looks to me like the format of the excitation list is not very clear. Guessing based on your example I think the correct excitation list should be: my_excitation_list = [ ((0, 2), (4, 6)), …
mrossinek's user avatar
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On number of parameters and operators in UCCSD in qiskit

Since UCCSD is a particle- and spin-conserving variational form, the number of parameters does not only depend on the number of spin orbitals but also their "nature". What I mean by that is that you a …
mrossinek's user avatar
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How does the Active Space Transform work theoretically?

The inactive Fock operator is the outcome of downfolding the inactive orbitals into the active space. This is explained in quite some detail in various quantum chemistry textbooks. A short summary of …
mrossinek's user avatar
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