Symmetry-conserving purification of quantum states within the density matrix renormalization group
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The density matrix renormalization group (DMRG) algorithm was originally designed to efficiently compute the zero-temperature or ground-state properties of one-dimensional strongly correlated quantum systems. The development of the algorithm at finite temperature has been a topic of much interest, because of the usefulness of thermodynamics quantities in understanding the physics of condensed matter systems, and because of the increased complexity associated with efficiently computing temperature-dependent properties. The ancilla method is a DMRG technique that enables the computation of these thermodynamic quantities. In this paper, we review the ancilla method, and improve its performance by working on reduced Hilbert spaces and using canonical approaches. Furthermore we explore its applicability beyond spins systems to t-J and Hubbard models.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1236593
- Alternate ID(s):
- OSTI ID: 1236403
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 93, Issue 4; ISSN 0163-1829
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Spinon confinement and a sharp longitudinal mode in Yb2Pt2Pb in magnetic fields
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journal | March 2019 |
Thermofield theory for finite-temperature quantum chemistry
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journal | April 2019 |
Finite temperature dynamics of the Mott insulating Hubbard chain | text | January 2017 |
Spinon Confinement and a Sharp Longitudinal Mode in Yb$_2$Pt$_2$Pb in Magnetic Fields | text | January 2019 |
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