Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Siddhartha Lal"'
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-53 (2021)
Abstract We perform a unitary renormalization group (URG) study of the 1D fermionic Hubbard model. The formalism generates a family of effective Hamiltonians and many-body eigenstates arranged holographically across the tensor network from UV to IR.
Externí odkaz:
https://doaj.org/article/2487e731de16403d818ab0e642b53e4a
Publikováno v:
New Journal of Physics, Vol 25, Iss 11, p 113011 (2023)
We propose a minimal effective impurity model that captures the phenomenology of the Mott–Hubbard metal–insulator transition of the half-filled Hubbard model on the Bethe lattice in infinite dimensions as observed by dynamical mean field theory (
Externí odkaz:
https://doaj.org/article/962a05d386394058b7dab0e51f969829
Publikováno v:
New Journal of Physics, Vol 25, Iss 6, p 063002 (2023)
An outstanding challenge involves understanding the many-particle entanglement of liquid states of quantum matter that arise in systems of interacting electrons. The Fermi liquid (FL) shows a violation of the area-law in real-space entanglement entro
Externí odkaz:
https://doaj.org/article/a3e966e3c03c410b8d9094e327d7e585
Autor:
Anirban Mukherjee, Siddhartha Lal
Publikováno v:
Nuclear Physics B, Vol 960, Iss , Pp 115170- (2020)
We present a unified framework for the renormalisation of the Hamiltonian and eigenbasis of a system of correlated electrons, unveiling thereby the interplay between electronic correlations and many-particle entanglement. For this, we extend substant
Externí odkaz:
https://doaj.org/article/7b03e8cb82654b99983280bd376f8b62
Autor:
Anirban Mukherjee, Siddhartha Lal
Publikováno v:
Nuclear Physics B, Vol 960, Iss , Pp 115163- (2020)
Capturing the interplay between electronic correlations and many-particle entanglement requires a unified framework for Hamiltonian and eigenbasis renormalization. In this work, we apply the unitary renormalization group (URG) scheme developed in a c
Externí odkaz:
https://doaj.org/article/5e77ea719a6f4c51af2967532dde8211
Autor:
Anirban Mukherjee, Siddhartha Lal
Publikováno v:
New Journal of Physics, Vol 22, Iss 6, p 063007 (2020)
We present a T = 0 K renormalization group (RG) phase diagram for the electronic Hubbard model in two dimensions on the square lattice at half filling. The RG procedure treats quantum fluctuations in the single particle occupation number nonperturbat
Externí odkaz:
https://doaj.org/article/881c52aed66747ac84937b32c83b3283
Autor:
Anirban Mukherjee, Siddhartha Lal
Publikováno v:
New Journal of Physics, Vol 22, Iss 6, p 063008 (2020)
We present a T = 0 K renormalization group (RG) phase diagram for the hole-doped 2D Hubbard model on the square lattice. The RG method employed is nonperturbative in treating quantum fluctuations of the single-particle occupation number via the unita
Externí odkaz:
https://doaj.org/article/3f5dabf2c09d4737aae69988f6d89b82
Publikováno v:
New Journal of Physics, Vol 21, Iss 2, p 023019 (2019)
We analyze the antiferromagnetic spin-1/2 XXZ model on the kagome lattice at finite external magnetic field with the help of a non-perturbative zero-temperature renormalization group (RG) technique. The exact nature of the ground and excited state pr
Externí odkaz:
https://doaj.org/article/8f5fd072e2e046c3a3d816933da93746
Publikováno v:
Physical Review A. 105
It is well known that the topological entanglement entropy ($S_{topo}$) of a topologically ordered ground state in 2 spatial dimensions can be captured efficiently by measuring the tripartite quantum information ($I^{3}$) of a specific annular arrang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03d3e869d5852747eb6c94ba48b5e5c5
https://doi.org/10.1103/physreva.105.052428
https://doi.org/10.1103/physreva.105.052428
Autor:
Siddhartha Patra, Abhirup Mukherjee, Anirban Mukherjee, N S Vidhyadhiraja, A Taraphder, Siddhartha Lal
We study the overscreened multi-channel Kondo (MCK) model using the recently developed unitary renormalization group (URG) technique. Our results display the importance of ground state degeneracy in explaining various important properties like the br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65c990ba05585a4f81d07fcaead0786f
http://arxiv.org/abs/2205.00790
http://arxiv.org/abs/2205.00790
