First heterogeneous quantum-classical computation on FLiBe clusters for tritium binding using EWF partitioning and ext-SQD on IBM hardware matches FCI fragment energies within 0.3 kcal/mol MAD but shows 12-110 kcal/mol errors in conformational and binding differences due to fragment construction.
ffsim: Faster simulation of fermionic quantum circuits
3 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
We present ffsim, an open-source software library for fast simulation of fermionic quantum circuits. ffsim exploits conservation of particle number and the z component of spin, symmetries present in a wide range of fermionic systems, to dramatically reduce memory usage and simulation time compared to general-purpose quantum circuit simulators. Compared to FQE, a library with similar functionality, ffsim differs in software design and is faster on a representative set of simulation benchmarks. Beyond state vector evolution by basic fermionic gates, ffsim offers a number of additional features including variational ansatzes, Hamiltonian time evolution via Trotter-Suzuki product formulas, efficient sampling of Slater determinants, seamless integration with Qiskit and PySCF, and comprehensive documentation. We demonstrate ffsim's capabilities on scientific applications involving quantum circuits of up to 64 qubits.
fields
quant-ph 3years
2026 3verdicts
UNVERDICTED 3representative citing papers
Hermitian excitation operators conserve Abelian symmetries under Trotterization for any encoding, with operator kirigami for non-Abelian symmetries; tests on small molecules show errors decrease with size and second-order Trotterization.
An ancilla-free method projects many-electron states onto point-group irreps via orbital rotations derived from representation-matrix eigenvectors and demonstrates it on benzene and ferrocene with a 32-qubit IBM hardware run.
citing papers explorer
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Quantum Computations on Fusion Blanket Molten Salts
First heterogeneous quantum-classical computation on FLiBe clusters for tritium binding using EWF partitioning and ext-SQD on IBM hardware matches FCI fragment energies within 0.3 kcal/mol MAD but shows 12-110 kcal/mol errors in conformational and binding differences due to fragment construction.
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Symmetry conservation with Trotterization and Quantum Phase Estimation
Hermitian excitation operators conserve Abelian symmetries under Trotterization for any encoding, with operator kirigami for non-Abelian symmetries; tests on small molecules show errors decrease with size and second-order Trotterization.
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Point-group symmetry analysis of many-electron wavefunctions on a quantum computer
An ancilla-free method projects many-electron states onto point-group irreps via orbital rotations derived from representation-matrix eigenvectors and demonstrates it on benzene and ferrocene with a 32-qubit IBM hardware run.