Browsing by Author "Dr. Faheel Ather Hashmi"

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    Can a Photon be Absorbed by Two Atoms? A Study into Strong Coupling Regime
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2021) FARAH RASHEED; CIIT/SP19-RPH-014/LHR; Dr. Faheel Ather Hashmi; LHR TP 7234
    In this thesis we reproduce the results claimed in the article PRL 117, 043601 (2016) titled “One Photon Can Simultaneously Excite Two or More Atoms”. The claim is very counter-intuitive and needs proper understanding. We present our understanding in this work. The work deals with ultra strong light matter interaction and superconductor quantum circuits. We review these in the thesis and justify the Hamiltonian given in the paper. We next numerically diagonalize the Hamiltonian to reproduce the eigenvalues plotted in the paper. There is a little discrepancy in the corresponding eigenvectors reported in the paper and in our work. Future work on the project can resolve the discrepancy. Finally, we work out the time evolution equations of the system.
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    Prediction of Quantum Probability using Neural Network
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2021) AMMARA TARIQ; CUI/SP20 -RPH-056/LHR; Dr. Faheel Ather Hashmi; LHR TP 7718
    In this thesis, I have used a machine-learning algorithm to predict the quantum probability of photon transmission from the polarizers. In this regard, I used a neural network model and trained it with the training data. To evaluate the performance of the model, testing data was used to check the accuracy of the model. I compared my results with another machine learning technique used to get the same results.