1 citations · 2 across the 5 of their papers we have counts for
7 papers
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…
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…
Quantum theory of time perception: phases,clocks and quantum algebra
Rukhsan Ul Haq, Shalini Harkar
Experience of time is one of the primordial human experiences which is deeply tied to human consciousness. But despite this intimate relation of time with human conscious experienc…