
Dr. Shahid Iqbal
Assistant Professor
Department of Physics
SNS
National University of Sciences and Technology (NUST)
School of Natural Sciences,H12, Islamabad, Pakistan
Tel :
+92 51 9085 5607
Specialization
Theoretical Quantum Physics
Education
PhD, Physics (QAU, Pakistan)



Profile
Education PhD 2011 from QuaidiAzam University Islamabad, Pakistan. MPhil 2005 from QuaidiAzam University Islamabad, Pakistan. MSc 2003 from Govt. College University Lahore, Pakistan. BSc 2001 from Punjab University Lahore, Pakistan.
Teaching and Research Positions Assistant Professor, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, Pakistan, 2012todate. Assistant Professor, Department of Physics, Govt. College University Lahore, 20092012. Visiting Scientist at MaxPlanck Institute for the Physics of Complex systems, Dresden, Germany, 20082009.
Scholarships & Awards HEC Indigenous Ph. D Scholarship, Higher Education Commission of Pakistan. IRSIP scholarship, Higher Education Commission of Pakistan. Visiting Scientist at MaxPlanck Institute for the Physics of Complex systems, Dresden, Germany, 20082009.
Research Research Interests:
Quantum Optics:
Coherent states of harmonic oscillator lie in the core of quantum optics and play an important role in the description of fundamental aspects of light. For instance, the properties of ideal lasers (coherent light without nonlinear effects), such as, subPoissonian photon statistics, photon correlation, temporally stable evolution, classicallike phasespace and minimum uncertainty relationship, can be modeled by these coherent states. In the presence of nonlinear medium, the light do not adhere the characteristics of ideal lasers. How can we model the state of light in the presence of nonlinear interaction with media? What kind of characteristics these states exhibit? The focus of our research is to address the various aspects of these issues.
The concept of coherent states can be extended for the general Hamiltonian systems beyond harmonic oscillator and these states are referred to as generalized coherent states. In contrast to the classicallike nature of harmonic oscillator coherent states, generalized coherent states exhibit nonclassical characteristics which may model, in some particular situations, the effects of nonlinear interactions of light with media. In our research, we study, i) various approaches to construct the coherent states for general Hamiltonian systems, ii) analyze their properties and iii) their potential applications in various research areas, such as, quantum optics (as mentioned above), quantum information and related areas.
Quantum Information:
The beam splitters and quantum interferometers played an important role in understanding the quantum nature of light, both from theoretical as well as experimental point of view. In the context of quantum information theory, the study of engineering and dynamics of entangled states at the outputs of these devices, in response to various quantum states applied at input, exhibit very interesting implications. In order to generate the entangled states at output, the nonclassical nature of the input state is essentially required.
In our research, we study the entanglement generation using various nonclassical states, such as, generalized coherent states of various kinds, squeezed coherent states, Fock states, displaced Fock states etc., as input state. Moreover, we study the dynamical and decoherence effects for these entangled states.
Quantum Chaos:
The quantum chaos deals with quantum dynamics of classically chaotic systems. It exhibits very fascinating phenomena, such as, dynamical localization, chaos assisted tunneling, nondispersive dynamics and quantum recurrence. A periodically driven onedimensional system may exhibit chaotic dynamics in classical domain and therefore serves as a testing ground for quantum chaos.
In our research we study the periodically driven powerlaw potentials and explore the various phenomena of quantum chaos. In particular, we solve the timedependent Schrödinger equation, analytically, corresponding periodically driven systems using secular perturbation theory. Under this approximation, the time dependentSchrödinger equation is mapped into a Mathieu equation whose solutions are wellknown in terms of Mathieu functions. In this way we find the quasieigenvalues and Eigen functions and study the phenomenon of quantum revivals. Moreover, we solve the dependentSchrödinger equation of the system numerically, and verify our analytically obtained results. Furthermore, we probe the signatures of nondispersive dynamics both analytically and numerically.
Research Students:
PhD Students
 Hadiah Bint Monir (Nonclassical Coherent states and their applications to quantum information)
MPhil
Iqra Yousaf (Atto second wave packet dynamics)
Bushra Tabassam (Entangled composite bosons)
Madiha Latif (Quantum Information Processing by Continous Variables)
Sunia Javed (Entanglement generation in optical lattices)
Graduated Students:
PhD
 Naila Amir (On the solutions of positiondependent effective mass systems and associated coherent states)
Mphil
 Usama Zaheer (Dynamical Behavior of the Morse Oscillator: The Coherent State Approach)
 Sara Midhat (Dynamics of Coherent State Wave Packets in Gravitational Cavity)
 Hadia Mushtaq (Entropic measurements of dynamical quantum systems)
 Nasim Bibi (Entanglement of BarutGirardello coherent states by optical beam splitters)
Publications Research Publications:
1. 
Ladder operators and associated algebra for positiondependent effective mass systems Naila Amir and Shahid Iqbal, Europhysics Letters 111 (2015) 20005.

2. 
Coherent states of nonlinear harmonic oscillator and some of their properties Naila Amir and Shahid Iqbal, J. Math. Phys. 56 (2015) 062108.

3. 
Exact Solutions of Schrodinger Equation for the PositionDependent Effective Mass Harmonic Oscillator, Naila Amir and Shahid Iqbal, Commun. Theor. Phys. 62 (2014) 790.

4. 
Comment on 'Coherent states for the nonlinear harmonic oscillator', Naila Amir and Shahid Iqbal, J. Math. Phys. 55 (2014) 114101.

5. 
Electronic excitation by short Xray pulses: from quantum beats to wave packet revivals, Paula Reviere, Shahid Iqbal, and JM Rost, J. Phys. B: At. Mol. & Opt. Phys. 47 (2014) 124039

6. 
Comment on '“stringy” coherent states inspired by the generalized uncertainty principle', Shahid Iqbal, Phys. Lett. B 725 (2013) 487.

7. 
GazeauKlauder Coherent States of Triangular Well Potential, Shahid Iqbal and Farhan Saif, J. Russ. Laser Res. 34 (2013) 77.

8. 
Comment on 'Generalized Heisenberg algebra coherent states for powerlaw potentials', Shahid Iqbal and Farhan Saif, Phys. Lett. A 377 (2012) 1531.

9. 
Generalized coherent states and their statistical characteristics in powerlaw potentials, Shahid Iqbal and Farhan Saif, J. Math. Phys. 52 (2011) 082105.

10. 
Spacetime Dynamics of GazeauKlauder Coherent States for Powerlaw Potentials, Shahid Iqbal, Paula Riviere and Farhan Saif, Int. J. Theor. Phys. 49 (2010) 2540.

11. 
Presentation, in the 4th International Symposium on Quantum Optics (August 2009), COMSATS Islamabad, entitled “nonclassical properties of generalized coherent states”. 
12. 
Quantum computation with particle in a driven square well, Shahid Iqbal and Farhan Saif, J. Russ. Laser Res. 29 (2008) 466. 
13. 
Quantum Recurrences in Driven Powerlaw Potentials, Shahid Iqbal, QuratulAnn and Farhan Saif, Phys. Lett. A, 356 (2006) 231 



Preprints:
1. 
Construction of BarutGirardello coherent states of positiondependent mass oscillator Naila Amir and Shahid Iqbal, (submitted).

2. 
Generalized algebra and associated coherent states for positiondependent effective mass systems Naila Amir and Shahid Iqbal, (Submitted) 
3. 
Algebraic solutions of nonlinear harmonic oscillator with positiondependent effective mass Naila Amir and Shahid Iqbal, (submitted) 
Conferences and Workshops:
1. 
Oral presentation, in International Scientific Spring15, (March 1620, 2015) National Center for Physics, Islamabad, entitled “temporal evolution of coherent states for positiondependent effective mass systems”.

2. 
Oral & poster presentation, in Winter College on Optics, Light: A Bridge between Earth and Space (February 920, 2015), International Center for Theoretical Physics (ICTP), Trieste, Italy. entitled “coherent states of nonlinear harmonic oscillator and nonclassical light”,

3. 
Participated, in Celebration International Year of Light (February 23 2015) National Center for Physics, Islamabad, Pakistan.

4. 
Oral presentation, Complex Nonlinear Systems: From Basic Science to Applications, (October 711, 2013) Samarkand, Uzbekistan, entitled “spatiotemporal dynamics of generalized coherent state wave packets”.

5. 
Presentation, in the 6th International Symposium on Quantum Optics (August 2011), COMSATS Islamabad, entitled “nonclassicality criteria for generalized coherent states and their applications to entanglement generation”.

6. 
Presentation, in the 4th International Symposium on Quantum Optics (August 2009), COMSATS Islamabad, entitled “nonclassical properties of generalized coherent states”.

7. 
Attended the 31st International Nathiagali Summer college on Physics and Contemporary Needs (June 26 July 8, 2006).

8. 
Attended the “9th Symposium Frontiers in Physics” at G. C. University Lahore, Pakistan on January, 2003.

Teaching Courses Taught:
PG Courses
Quantum Mechanics
Quantum Dynamics Introduction to Quantum Optics Optomechanics
UG Courses
Quantum Mechanics Mathematical Methods in Physics Signals and Systems Digital Signal Processing Quantum Computation


