13 citations · 22 across the 11 of their papers we have counts for
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A systematic method for Schrieffer-Wolff transformation and its generalizations
Rukhsan Ul Haq, Keshav Singh
Schrieffer-Wolff transformation is extensively used in quantum many-body physics to calculate the low energy effective Hamiltonian. It offers a perturbative method to understand th…
An Explicit Method for Schrieffer-Wolff Transformation
Rukhsan Ul Haq, Sachin Satish Bharadwaj, Towseef Ali Wani
Schrieffer-Wolff transformation is a very important transformation in Quantum Many Body physics. Yet, there isn't an explicit method in the literature to calculate the generator of…
Schrieffer-Wolff transformation of Anderson Models
Rukhsan Ul Haq, Sachin Satish Bharadwaj
Schrieffer-Wolff transformation is one of the very important transformations in the study of quantum many body physics. It is used to arrive at the low energy effective hamiltonian…
Renormalization group study of quantum criticality in gapped Kondo model
Rukhsan Ul Haq, Anirban Sharma
Quantum impurity models are the prototypical examples of quantum many-body dynamics which manifests in their spectral and transport properties. Single channel Anderson(and Kondo mo…
Kondo Effect Route to Probing Majorana-Kramers Pairs Coupled to Quantum Dot
Rukhsan Ul Haq, Keshav Singh
In this paper, we study a set-up in which quantum dot is tunnel-coupled to Majorana-Kramers pair(MKP) which are the edge modes of time reversal invariant topological superconductor…
Scaling analysis of the extended single impurity Anderson model: Renormalization due to valence fluctuations
Rukhsan Ul Haq, N. S. Vidhyadhiraja
In this paper we have explored the role of valence fluctuations in an extended Anderson impurity model (e-SIAM) in which there is an additional Hubbard repulsion between conduction…
Topological Order and Topological Protection of Majorana Fermion Qubits
Rukhsan Ul Haq, Louis H Kauffman
The Kitaev chain model exhibits topological order that manifests as topological degeneracy, Majorana edge modes and topological invariance of the abulk spectrum. This model…