Beyond MP2 initialization for unitary coupled cluster quantum circuits
The unitary coupled cluster (UCC) ansatz is a promising tool for achieving high-precision results using the variational quantum eigensolver (VQE) algorithm in the NISQ era. However, results on quantum hardware are thus far very limited and simulations have only accessed small system sizes. We advanc...
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| Format: | Article |
| Language: | English |
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Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2024-11-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2024-11-26-1538/pdf/ |
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| _version_ | 1846155160586289152 |
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| author | Mark R. Hirsbrunner Diana Chamaki J. Wayne Mullinax Norm M. Tubman |
| author_facet | Mark R. Hirsbrunner Diana Chamaki J. Wayne Mullinax Norm M. Tubman |
| author_sort | Mark R. Hirsbrunner |
| collection | DOAJ |
| description | The unitary coupled cluster (UCC) ansatz is a promising tool for achieving high-precision results using the variational quantum eigensolver (VQE) algorithm in the NISQ era. However, results on quantum hardware are thus far very limited and simulations have only accessed small system sizes. We advance the state of the art of UCC simulations by utilizing an efficient sparse wavefunction circuit solver and studying systems up to 64 qubits. Here we report results obtained using this solver that demonstrate the power of the UCC ansatz and address pressing questions about optimal initial parameterizations and circuit construction, among others. Our approach enables meaningful benchmarking of the UCC ansatz, a crucial step in assessing the utility of VQE for achieving quantum advantage. |
| format | Article |
| id | doaj-art-d090dbc1b32d43889a9ad2c29f6f90f8 |
| institution | Kabale University |
| issn | 2521-327X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj-art-d090dbc1b32d43889a9ad2c29f6f90f82024-11-26T16:30:56ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2024-11-018153810.22331/q-2024-11-26-153810.22331/q-2024-11-26-1538Beyond MP2 initialization for unitary coupled cluster quantum circuitsMark R. HirsbrunnerDiana ChamakiJ. Wayne MullinaxNorm M. TubmanThe unitary coupled cluster (UCC) ansatz is a promising tool for achieving high-precision results using the variational quantum eigensolver (VQE) algorithm in the NISQ era. However, results on quantum hardware are thus far very limited and simulations have only accessed small system sizes. We advance the state of the art of UCC simulations by utilizing an efficient sparse wavefunction circuit solver and studying systems up to 64 qubits. Here we report results obtained using this solver that demonstrate the power of the UCC ansatz and address pressing questions about optimal initial parameterizations and circuit construction, among others. Our approach enables meaningful benchmarking of the UCC ansatz, a crucial step in assessing the utility of VQE for achieving quantum advantage.https://quantum-journal.org/papers/q-2024-11-26-1538/pdf/ |
| spellingShingle | Mark R. Hirsbrunner Diana Chamaki J. Wayne Mullinax Norm M. Tubman Beyond MP2 initialization for unitary coupled cluster quantum circuits Quantum |
| title | Beyond MP2 initialization for unitary coupled cluster quantum circuits |
| title_full | Beyond MP2 initialization for unitary coupled cluster quantum circuits |
| title_fullStr | Beyond MP2 initialization for unitary coupled cluster quantum circuits |
| title_full_unstemmed | Beyond MP2 initialization for unitary coupled cluster quantum circuits |
| title_short | Beyond MP2 initialization for unitary coupled cluster quantum circuits |
| title_sort | beyond mp2 initialization for unitary coupled cluster quantum circuits |
| url | https://quantum-journal.org/papers/q-2024-11-26-1538/pdf/ |
| work_keys_str_mv | AT markrhirsbrunner beyondmp2initializationforunitarycoupledclusterquantumcircuits AT dianachamaki beyondmp2initializationforunitarycoupledclusterquantumcircuits AT jwaynemullinax beyondmp2initializationforunitarycoupledclusterquantumcircuits AT normmtubman beyondmp2initializationforunitarycoupledclusterquantumcircuits |