18 citations · 21 across the 10 of their papers we have counts for
10 papers
Breakdown of Monotonic Impurity Entropy Flow in -Symmetric Multichannel Kondo Systems
Pradip Kattel, Abay Zhakenov, Natan Andrei
We study a -symmetric non-Hermitian multichannel Kondo model consisting of a pair of spin- impurities coupled to conduction-electron channels through com…
Boundary phases and thermodynamics of the Kondo spin- chain: from overscreened Kondo to boundary-bound states
Abay Zhakenov, Pradip Kattel, Andreas Gleis +1
We study a spin- impurity coupled to the boundary of a strongly correlated spin- Takhtajan--Babujian chain, an integrable model whose low-energy physics is described by…
Monotonic and non-Nonmonotonic Impurity Entropy flows in a -Symmetric Kondo Model
Pradip Kattel, Abay Zhakenov, Natan Andrei
Quantum impurity models provide a paradigmatic setting for studying Kondo screening, boundary criticality, and impurity entropy. While these phenomena are well understood in unitar…
Multichannel Kondo Effect in Superconducting Leads
Pradip Kattel, Abay Zhakenov, Natan Andrei
The traditional multichannel Kondo effect takes place when several gapless metallic electronic channels interact with a localized spin- impurity, with the number of channels …
Thermodynamics in a split Hilbert space: Quantum impurity at the edge of the Heisenberg chain
Abay Zhakenov, Pradip Kattel, Natan Andrei
We study the isotropic spin- Heisenberg chain with a single edge-coupled impurity of arbitrary exchange strength . The model exhibits four impurity phases. For anti…
Thermodynamics in a split Hilbert space: Quantum impurity at the edge of a one-dimensional superconductor
Pradip Kattel, Abay Zhakenov, Natan Andrei
We present a thermodynamic description of a single magnetic impurity at the edge of a superconducting wire. The impurity exhibits four phases $\unicode{x2014}$ Kondo, Yu-Shiba-Rusi…
Competing color superconductivity and color Kondo effect in quark matter
Pradip Kattel, Abay Zhakenov, Natan Andrei
The competition between bulk color superconductivity and the localized screening of a heavy quark impurity, analogous to the Kondo effect, leads to a rich spectrum of phenomena in…
Kondo overscreening in the presence of superconductivity
Pradip Kattel, Abay Zhakenov, Natan Andrei
We consider a model describing a system where the superconductivity competes with the overscreened Kondo effect. The model consists of a single spin quantum impurity…
Dissipation driven phase transition in the non-Hermitian Kondo model
Pradip Kattel, Abay Zhakenov, Parameshwar R. Pasnoori +2
Non-Hermitian Hamiltonians capture several aspects of open quantum systems, such as dissipation of energy and non-unitary evolution. An example is an optical lattice where the inel…
AGT basis in SCFT for c=3/2 and Uglov Polynomials
Vladimir Belavin, Abay Zhakenov
AGT allows one to compute conformal blocks of d = 2 CFT for a large class of chiral CFT algebras. This is related to the existence of a certain orthogonal basis in the module of th…