Many-body localization as a large family of localized ground states
Journal Article
·
· Physical Review B
- Université de Toulouse, CNRS, UPS (France); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Université de Toulouse, CNRS, UPS (France)
Many-body localization (MBL) addresses the absence of thermalization in interacting quantum systems, with nonergodic high-energy eigenstates behaving as ground states, only area-law entangled. However, computing highly excited many-body eigenstates using exact methods is very challenging. Instead, we show that one can address high-energy MBL physics using ground-state methods, which are much more amenable to many efficient algorithms. Here, we find that a localized many-body ground state of a given interacting disordered Hamiltonian H0 is a very good approximation for a high-energy eigenstate of a parent Hamiltonian, close to H0 but more disordered. Lastly, this construction relies on computing the covariance matrix, easily achieved using density-matrix renormalization group for disordered Heisenberg chains up to L=256 sites.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1506401
- Alternate ID(s):
- OSTI ID: 1490912
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 99; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
From eigenstate to Hamiltonian: Prospects for ergodicity and localization
|
journal | October 2019 |
Kosterlitz-Thouless scaling at many-body localization phase transitions
|
journal | March 2019 |
Multiscale entanglement clusters at the many-body localization phase transition
|
journal | April 2019 |
Entanglement-Guided Search for Parent Hamiltonians
|
journal | April 2019 |
| Entanglement guided search for parent Hamiltonians | text | January 2018 |
| Kosterlitz-Thouless scaling at many-body localization phase transitions | text | January 2018 |
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