# Haroon SaifiIntegral University · Department of Physics

Haroon Saifi

PhD (Theoretical Condensed Matter Physics), M.Sc. Physics

## About

5

Publications

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Citations since 2017

Introduction

Thesis entitled as "Exact Diagonalization Studies on Few Electron Quantum Dots "

## Publications

Publications (5)

The double quantum dot system with single-walled metallic armchair carbon nanotube leads has been studied using Non-equilibrium Green function in the Keldysh formalism. The effect of relative spacing between the energy levels of the dots, interdot tunneling matrix-element, interdot Coulomb interaction and van-Hove singularities in density of states...

The double quantum dot system with single-walled metallic armchair carbon nanotube leads has been studied using Non-equilibrium Green function in the Keldysh formalism. The effect of relative spacing between the energy levels of the dots, interdot tunneling matrix-element, interdot Coulomb interaction and van-Hove singularities in density of states...

Exact eigenstates of the parallel coupled double quantum dots attached to the non-interacting
leads taken in zero-bandwidth limit are analytically obtained in each particle and spin sector. The
ground state of the half-�lled system is identi�ed from a four dimensional subspace of the twenty
dimensional Hilbert space for di�erent values of tunable p...

Electron transport at zero temperature through T-shaped double quantum dot attached to the non-interacting leads is studied using Keldysh non-equilibrium Green's function technique. Linear conductance profile and dot occupancies are calculated for various parameters corresponding
to non-interacting as well as interacting electrons on the dots. In c...

## Questions

Questions (2)

Consider a Hubbard type Hamiltonian for a system. For a given fix no of particles N, the ground state is known. Now it is required to calculate the entanglement between the electrons associated with two fix sites. Can anybody suggest me a video tutorial or article explaining it step by step?

I have calculated 4-particle eigenstates for my system which is Hubbard type 4-site model, analytically. All sites in the model are distinct, I am interested in two particular sites for which I have to calculate correlation between the two while the remaining system is integrated out. My problem is that I do not know how to integrate out (Trace out). The eigenstates are in second quantized form(operator notation). Can anyone suggest me a tutorial which explains step by step whole procedure?

## Network

## Projects

Projects (3)

Thermodynamic and transport properties are studied at zero and high temperatures using exact diagonalization and Keldysh's formalism.