| |
Record |
Links |
|
Author  |
Gomez-Lurbe, R.; Perez, A. |
|
| |
Title |
Pauli propagation for imaginary-time evolution |
Type |
Journal Article |
| |
Year |
2026 |
Publication |
New Journal of Physics |
Abbreviated Journal |
New J. Phys. |
|
| |
Volume |
28 |
Issue |
8 |
Pages |
084517 - 26pp |
|
| |
Keywords |
imaginary-time evolution; quantum many-body systems; computational methods; Pauli propagation; classical simulation of quantum systems |
|
| |
Abstract |
We extend the Pauli propagation framework to imaginary-time evolution and introduce imaginary-time Pauli propagation (ITPP), an operator-based algorithm for approximating thermal and ground-state properties directly in the Pauli basis. We derive explicit imaginary-time propagation rules for Pauli strings and analyze the main approximation errors arising from Trotterization and Pauli-space truncation, including bounds that account for the non-unitary nature of the evolution. Benchmarking ITPP on the one-dimensional transverse field Ising model, we find that the method performs best in the high-temperature regime, where thermal states admit a compressed Pauli-basis approximation, while the required number of Pauli terms grows rapidly as the system approaches the ground-state limit. We further compare with tensor network simulations and study finite-temperature scalability through the number of retained Pauli terms required to reach a fixed target accuracy. These results establish ITPP as a complementary framework for imaginary-time simulation and suggest that combining imaginary-time and real-time Pauli propagation could provide a pathway toward simulating more general non-unitary and open quantum system dynamics within a unified Pauli-based framework. |
|
| |
Address |
[Gomez-Lurbe, Rafael; Perez, Armando] Univ Valencia, Dept Fis Teor IFIC, CSIC, E-46100 Valencia, Spain, Email: rafael.gomez-lurbe@uv.es |
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
IOP Publishing Ltd |
Place of Publication |
|
Editor |
|
|
| |
Language |
English |
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
1367-2630 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
WOS:001861091700001 |
Approved |
no |
|
| |
Is ISI |
yes |
International Collaboration |
no |
|
| |
Call Number |
IFIC @ pastor @ |
Serial |
7412 |
|
| Permanent link to this record |
