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| Format: | Preprint |
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2026
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| Online-Zugang: | https://arxiv.org/abs/2605.03123 |
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| author | Sung, Kevin J. Choi, Inho Amico, Mirko Andrews, Bartholomew Ayantuna, Esra Kawashima, Yukio Lin, Wan-Hsuan Omanovic, David Piccinelli, Samuele Moreno, Javier Robledo Saki, Abdullah Ash Shee, James Shin, Soyoung Tran, Minh C. Ueda, Kento Zhang, Haimeng Motta, Mario |
| author_facet | Sung, Kevin J. Choi, Inho Amico, Mirko Andrews, Bartholomew Ayantuna, Esra Kawashima, Yukio Lin, Wan-Hsuan Omanovic, David Piccinelli, Samuele Moreno, Javier Robledo Saki, Abdullah Ash Shee, James Shin, Soyoung Tran, Minh C. Ueda, Kento Zhang, Haimeng Motta, Mario |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_03123 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | ffsim: Faster simulation of fermionic quantum circuits Sung, Kevin J. Choi, Inho Amico, Mirko Andrews, Bartholomew Ayantuna, Esra Kawashima, Yukio Lin, Wan-Hsuan Omanovic, David Piccinelli, Samuele Moreno, Javier Robledo Saki, Abdullah Ash Shee, James Shin, Soyoung Tran, Minh C. Ueda, Kento Zhang, Haimeng Motta, Mario Quantum Physics 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. |
| title | ffsim: Faster simulation of fermionic quantum circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.03123 |