Unitary Dilation Strategy Towards Efficient and Exact Simulation of Non-Unitary Quantum Evolutions
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866915129637994496 |
|---|---|
| author | Mehta, Aman Smart, Scott E. Peetz, Joseph Mazziotti, David A. Narang, Prineha |
| author_facet | Mehta, Aman Smart, Scott E. Peetz, Joseph Mazziotti, David A. Narang, Prineha |
| contents | Simulating quantum systems with their environments often requires non-unitary operations, and mapping these to quantum devices often involves expensive dilations or prohibitive measurement costs to achieve desired precisions. Building on prior work with a finite-differences strategy, we introduce an efficient and exact single-ancilla unitary decomposition technique that addresses these challenges. Our approach is based on Lagrange-Sylvester interpolation, akin to analytical differentiation techniques for functional interpolation. As a result, we can exactly express any arbitrary non-unitary operator with no finite approximation error using an easily computable decomposition. This can lead to several orders of magnitude reduction in the measurement cost, which is highly desirable for practical quantum computations of open systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_18697 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unitary Dilation Strategy Towards Efficient and Exact Simulation of Non-Unitary Quantum Evolutions Mehta, Aman Smart, Scott E. Peetz, Joseph Mazziotti, David A. Narang, Prineha Quantum Physics Simulating quantum systems with their environments often requires non-unitary operations, and mapping these to quantum devices often involves expensive dilations or prohibitive measurement costs to achieve desired precisions. Building on prior work with a finite-differences strategy, we introduce an efficient and exact single-ancilla unitary decomposition technique that addresses these challenges. Our approach is based on Lagrange-Sylvester interpolation, akin to analytical differentiation techniques for functional interpolation. As a result, we can exactly express any arbitrary non-unitary operator with no finite approximation error using an easily computable decomposition. This can lead to several orders of magnitude reduction in the measurement cost, which is highly desirable for practical quantum computations of open systems. |
| title | Unitary Dilation Strategy Towards Efficient and Exact Simulation of Non-Unitary Quantum Evolutions |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2501.18697 |