our work on a full state vector simulator based on Pauli rotations: arxiv.org/pdf/2504.17881
we observe a speed-up over other high-performance libraries by orders of magnitude! (Marek deserves all credit) Could be useful for benchmarking and testing of heuristic algorithms, source code is available

Yes please

cool stuff! As I understand you are not considering the error in operator norm but in terms of an expectation w.r.t. a state. That reminds me of adiabatic evolution, following some eigenstate along a time-dependent Hamiltonian. You don't mention that application, so maybe I am missing something?

A molecular model with N orbitals requires N qubits when mapped to a digital quantum computer - this becomes expensive for large active spaces. Our publication shows how to include more orbitals perturbatively without more qubits
journals.aps.org/prresearch/a... #quantumcomputing #compchem #physics

yea, specialised hardware for matrix manipulation accelerates matrix manipulations - they state a 80x speedup compared to a parallel CPU implementation. There's no algorithmic improvement that changes the asymptotic scaling with bond dimension or number of sites.

Parallel Implementation of the Density Matrix Renormalization Group Method Achieving a Quarter petaFLOPS Performance on a Single DGX-H100 GPU Node We report cutting edge performance results on a single node hybrid CPU-multi-GPU implementation of the spin adapted ab initio Density Matrix Renormalization Group (DMRG) method on current state-of-the...

Quantum chemical systems that are challenging for classical methods and therefore have been presented as targets for quantum computers (for example the poster child FeMoco) are getting in reach of DMRG methods:
pubs.acs.org/doi/10.1021/...
#compchemsky #quantumcomputing #physics 🧪

Hi, could you add me to the list? I am a PhD-student in quantum physics in Copenhagen: qmath.ku.dk/staff/

Classification of electronic structures and state preparation for... Quantum computation for chemical problems will require the construction of guiding states with sufficient overlap with a target state. Since easily available and initializable mean-field states...

Recent upload on the overlap issue for computing molecular ground state energies on a quantum computer: arxiv.org/abs/2409.08910
The use of orbital-entropies definitely brings more insight into the debate (remember www.nature.com/articles/s41...)

#quantumcomputing #physics #compchem #quantum 🧪⚛️

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