Resummation of Diagrammatic Series with Zero Convergence Radius for Strongly Correlated Fermions
نویسندگان
چکیده
منابع مشابه
Regularization of diagrammatic series with zero convergence radius.
The divergence of perturbative expansions which occurs for the vast majority of macroscopic systems and follows from Dyson's collapse argument prevents the direct use of Feynman's diagrammatic technique for controllable studies of strongly interacting systems. We show how the problem of divergence can be solved by replacing the original model with a convergent sequence of successive approximati...
متن کاملStrongly correlated fermions after a quantum quench.
Using the adaptive time-dependent density-matrix renormalization group method, we study the time evolution of strongly correlated spinless fermions on a one-dimensional lattice after a sudden change of the interaction strength. For certain parameter values, two different initial states (e.g., metallic and insulating) lead to observables which become indistinguishable after relaxation. We find t...
متن کاملElastic Theory Has Zero Radius of Convergence.
In nonlinear elastic theory, the inverse bulk modulus K , for example, depends on the compression P: 1yKsPd c0 1 c1P 1 c2P 1 · · · 1 cnP 1 · · · . Elastic materials that allow cracks are unstable at finite temperature with respect to fracture under a stretching load. As a result, the above power series has zero radius of convergence: it is an asymptotic series. For a two-dimensional isotropic...
متن کاملObservable zero sound in strongly correlated metals.
The slow zero-sound mode expected near the Mott transition in strongly interacting twodimensional Fermi systems that are neutral is shown to persist as the physical sound mode in the case that the fermion carries electronic charge and is embedded in a positive ionic background. The latter sound velocity softens completely precisely at the Mott transition, indicating that a zone-center structura...
متن کاملFew-qubit quantum-classical simulation of strongly correlated lattice fermions
*Correspondence: [email protected] 1Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK Full list of author information is available at the end of the article Abstract We study a proof-of-principle example of the recently proposed hybrid quantum-classical simulation of strongly correlated fermion models in the thermodynamic limit. In a ‘tw...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2018
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.121.130405