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Because model WrightSim Hamiltonians have a specific size and number of non-zero elements, it is possible to create and compile a low-level matrix-vector multiplication method to be used in WrightSim …
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The PurificationMPS views the purified state as an MPS with an additional extra leg q, i.e. it explicitly distinguishes the ancilla from the physical hilbert space.
Thus, algorithm engines that shoul…
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I've been trying to use the `expectation_from_samples` method under `SymbolicHamiltonian` together with measurements in the Pauli X/Y basis (#799).
However, `expectation_from_samples` currently only …
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#### Summary:
For N parameters, there's an NxN Cholesky computed every time a new momentum is drawn. In reality we only need to recompute that when the metric changes.
#### Description:
Check…
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Hi all,
I've been using OpenFermion to study some simple spin models on the Honeycomb lattice related to the Kitaev model, and it occurred to me, given the popularity of the Kitaev model and other …
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There is a use-case for a general interface to different neighbourlist implementations.
(Previous discussions have failed to lead anywhere...)
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### Environment
- **Qiskit Nature version**: 343d2901
- **Python version**: 3.9.16
- **Operating system**: RHEL 8.8
### What is happening?
Since the introduction of `InterleavedQubitMapper` (#1…
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# Abstract
Aqua has the DOcplex translator for optimization problems. It automatically generates an Ising Hamiltonian for an optimization problem and you can solve it with quantum computers by applyi…
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From discussing with Joseph Carlson, people want to study a Hubbard model where each site splits up into not only 2 spins, but more. For instance, 3 represents some quark model, 4 some nuclei maybe. W…
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* [Link](https://arxiv.org/pdf/1907.12124.pdf)
* Title: From eigenstate to Hamiltonian: new prospects for ergodicity and localization
* Reason: inverse problem: from eigenstates to parent Hamiltonia…