Effect of third-order dispersion on the solitonic solutions of the Schrödinger equations with cubic nonlinearity, C. H. Samet, M. Benarous, M. Asad-uz-zaman, and U. Al Khawaja, Advances in Mathematical Physics,  Volume  2014 (2014).

Lax pairs and integrability conditions of higher-order nonlinear Schrödinger equations, M. Asad-uz-zaman, H. C. Samet, and U. Al Khawaja, submitted for publication, Applied Mathematics and Computation.

Modulational instability analysis of the Peregrine soliton, U. Al Khawaja, H. Bahlouli, M. Asad-uz-zaman, and S. M. Al-Marzoug, Communications in Nonlinear Science and Numerical Simulation 19, 2706 (2014).

Directional flow of solitons with asymmetric potential wells: Soliton diode, M. Asad-uz-zaman and U. Al Khawaja, Europhysics Letters 101, 50008 (2013).

Modification of roton instability due to the presence of a second dipolar Bose-Einstein condensate, M. Asad-uz-Zaman and D. Blume, Physical Review A 83, 033616 (2011).

Tuning the structural and dynamical properties of a dipolar Bose-Einstein condensate: Ripples and instability islands, M. Asad-uz-Zaman and D. Blume, New Journal of Physics 12, 065022 (2010).

Aligned dipolar Bose-Einstein condensate in a double-well potential: From cigar-shaped to pancakeshaped, M. Asad-uz-Zaman and D. Blume, Physical Review A 80, 053622 (2009).

2003-2005: Graduate School Scholar Award, Physics and Astronomy Dept., Washington State University, Pullman, WA, USA.

2000: Gold medal, International conference on Applied Mathematics and Mathematical Physics, Shahjalal

University of Science and Technology, Sylhet, Bangladesh.

1995-2000: Dhaka University Scholarship, Physics Department, Dhaka University, Dhaka, Bangladesh.

Conference:

Invited talk, April 26-30, 2013: Joint Meeting: Scientific days of the LPTPM and of the Physics Department,

Lax pairs and integrability conditions of higher-order nonlinear Schr ¨odinger equations, M. Asad-uz-Zaman, Chlef, Algeria.

Invited talk, January 2, 2013: Nonlinearity, difficult but full of possibilities: Soliton diode is a specific example, M. Asad-uz-zaman, Dhaka, Bangladesh.

Invited talk, November 8, 2012: Directional flow of solitons with asymmetric potential wells: Soliton diode, M. Asad-uz-zaman, Al Ain, United Arab Emirates.

DAMOP, June 13-17, 2011: Contributed talk, given by D. Blume, Modification of roton instability due to the presence of a second dipolar Bose-Einstein condensate, M. Asad-uz-Zaman and D. Blume, Atlanta, Georgia, USA.

DAMOP, May 25-29, 2010: Poster presented, Tuning the structural and dynamical properties of a dipolar Bose–Einstein condensate: ripples and instability islands, M. Asad-uz-Zaman and D. Blume, Houston, Texas, USA.

Weakly bound systems in Atomic and Nuclear Physics, March 8-12, 2010: Workshop attended, Seattle, Washington, USA.

DAMOP, May 19-23, 2009: Poster presented, Dipolar BEC in a double-well potential, M. Asad-Uz- Zaman and D. Blume, Charlottesville, Virginia, USA.

2008-2011: PhD in Physics, Mean-field studies of dipolar Bose-Einstein condensates, Adviser: D.

Blume, Washington State University, Pullman, WA, USA.

2003-2007: MS in Physics, Investigating electron flow through a quantum point contact, Adviser: S.

Tomsovic, Washington State University, Pullman, WA, USA.

1998-2000: M.Sc. in Physics, Dhaka University, Dhaka, Bangladesh.

1994-1998: B.Sc. in Physics, Dhaka University, Dhaka, Bangladesh.

April 2018 – Present: Associate Professor, Department of Mathematics and Physics, North South University, Dhaka, Bangladesh.

January 2015 – March 2018: Assistant Professor, Department of Mathematics and Physics, North South University, Dhaka, Bangladesh. 

September 2014 – December 2014: Part time Assistant Professor, Department of Electrical and Computer Engineering,  North South University, Dhaka, Bangladesh. 

July 2012-July 2014: Postdoctoral fellow, Department of Physics, United Arab Emirates University, Al Ain, United Arab Emirates.

Feb 2012-June 2012: Visiting Faculty, Department of Physics, United Arab Emirates University, Al Ain, United Arab Emirates.

September 2011-Feb 2012: Assistant Professor (Part time), Department of Electrical Engineering and Computer Science, North South University, Dhaka, Bangladesh.

May 2011-Feb 2012: Lecturer, Physics Department, Dhaka University, Dhaka, Bangladesh.

Fall2003-Spring 2006 and Fall 2008: Teaching Assistant, Physics and Astronomy Dept., Washington State University, Pullman, WA, USA.

March 2001- August 2003: Lecturer, Physics Department, Dhaka University, Dhaka, Bangladesh.

August 2000- February 2001: Junior Lecturer, Independent University, Bangladesh, Dhaka, Bangladesh.

February 2000- August 2003: Part Time Physics Teacher, Bangladesh International Tutorial, Dhaka, Bangladesh.

Muhammad Asad-uz-Zaman

Email: mzamanphy@gmail.com

Professional Experiences

December 2023 – December 2024: Chair, Scientific Review Committee, School of Engineering and Physical Sciences, North South University, Dhaka, Bangladesh

April 2018 – Present: Associate Professor, Department of Mathematics and Physics, North South University, Dhaka, Bangladesh 

Teaching undergraduate level Physics and Mathematics courses

January 2015 – March 2018: Assistant Professor, Department of Mathematics and Physics, North South University, Dhaka, Bangladesh 

Taught undergraduate level Physics and Mathematics courses

September 2014 – December 2014: Part time Assistant Professor, Department of Electrical and Computer Engineering, North South University, Dhaka, Bangladesh 

Taught undergraduate level Mathematics courses

July 2012-July 2014: Postdoctoral fellow, Department of Physics, United Arab Emirates University, Al Ain, United Arab Emirates

Doing research on a project to increase the bit rate in optical fiber communication system with Prof. Usama Al Khawaja

Feb 2012-June 2012: Visiting Faculty, Department of Physics, United Arab Emirates University, Al Ain, United Arab Emirates

Taught undergraduate level physics courses

September 2011-Feb 2012: Assistant Professor (Part time), Department of Electrical Engineering and Computer Science, North South University, Dhaka, Bangladesh

Taught undergraduate level physics courses

May 2011-Feb 2012: Lecturer, Physics Department, Dhaka University, Dhaka, Bangladesh

Taught Nuclear physics and conducted laboratories for physics and numerical methods

Fall2003-Spring 2006 and Fall 2008: Teaching Assistant, Physics and Astronomy Dept., Washington State University, Pullman, WA, USA

Conducted two sections of introductory physics lab (PHYS 201) and helped students in tutorial hours

March 2001- August 2003: Lecturer, Physics Department, Dhaka University, Dhaka, Bangladesh

Taught an undergraduate level physics course, led a problem class, and conducted a lab

August 2000- February 2001: Junior Lecturer, Independent University, Bangladesh, Dhaka, Bangladesh

Taught an undergraduate level physics course and led a lab

February 2000- August 2003: Part Time Physics Teacher, Bangladesh International Tutorial, Dhaka, Bangladesh

Taught an advanced level physics course and conducted a lab

Education

2008-2011: PhD in Physics, Mean-field studies of dipolar Bose-Einstein condensates, Adviser: D. Blume, Washington State University, Pullman, WA, USA. CGPA 3.76 out of 4

2003-2007: MS in Physics, Investigating electron flow through a quantum point contact, Adviser: S. Tomsovic, Washington State University, Pullman, WA, USA. CGPA 3.76 out of 4

1998-2000: M.Sc. in Physics, Dhaka University, Dhaka, Bangladesh (First class fourth position)

1994-1998: B.Sc. in Physics, Dhaka University, Dhaka, Bangladesh (First class first position)

Scholarships and Awards

2003-2005: Graduate School Scholar Award, Physics and Astronomy Dept., Washington State University, Pullman, WA, USA

2000: Gold medal, International conference on Applied Mathematics and Mathematical Physics, Shahjalal University of Science and Technology, Sylhet, Bangladesh

1995-2000: Dhaka University Scholarship, Physics Department, Dhaka University, Dhaka, Bangladesh

Conferences and Workshops Attended and Invited Talks

Invited talk, April 26-30, 2013: Joint Meeting: Scientific days of the LPTPM and of the Physics Department, Lax pairs and integrability conditions of higher-order nonlinear Schr ¨odinger equations, M.Asad-uz-Zaman, Chlef, Algeria

Invited talk, January 2, 2013: Nonlinearity, difficult but full of possibilities: Soliton diode is a specific example, M. Asad-uz-zaman, Dhaka, Bangladesh

Invited talk, November 8, 2012: Directional flow of solitons with asymmetric potential wells: Soliton diode, M. Asad-uz-zaman, Al Ain, United Arab Emirates

DAMOP, June 13-17, 2011: Contributed talk, given by D. Blume, Modification of roton instability due to the presence of a second dipolar Bose-Einstein condensate, M. Asad-uz-Zaman and D. Blume, Atlanta, Georgia, USA

DAMOP, May 25-29, 2010: Poster presented, Tuning the structural and dynamical properties of a dipolar Bose–Einstein condensate: ripples and instability islands, M. Asad-uz-Zaman and D. Blume, Houston, Texas, USA

Weakly bound systems in Atomic and Nuclear Physics, March 8-12, 2010: Workshop attended, Seattle, Washington, USA

DAMOP, May 19-23, 2009: Poster presented, Dipolar BEC in a double-well potential, M. Asad-Uz-Zaman and D. Blume, Charlottesville, Virginia, USA

Laboratories and Institutes Visited

Max Planck Institute for the Physics of Complex Systems, February 16-March 19, 2007: Worked with S. Tomsovic, Dresden, Germany

Pacific Northwest National Laboratory (PNNL),May 15-26, 2006: Intensive TwoWeek Nanoscience and Nanotechnology Course, Coordinated by Prof. Lai Sheng Wang(Washington State University, USA), Prof. F. S. Ohuchi (University of Washington, USA), and Dr. D. R. Baer (PNNL), Richland, WA, USA

Publications

Families of Localized and Oscillatory Solutions to the Coupled-Nonlinear Two-Dimensional Dirac Equations, H. Chaachoua Sameut, M. Asad-uz-zaman, U. Al Khawaja, and M. Benarous, Physics of Wave Phenomena, 2018, Volume 26, Number 4, 306 (2018)

Lax Pairs and Integrability Conditions of Higher-Order Nonlinear Schr ̈odinger Equations, M. Asad-uz-zaman, H. Chachou Samet, and U. Al Khawaja, Communications in Theoretical Physics, Volume 66, Number 2, 171 (2016)

Effect of third-order dispersion on the solitonic solutions of the Schrödinger equations with cubic nonlinearity, C. H. Samet, M. Benarous, M. Asad-uz-zaman, and U. Al Khawaja, Advances in Mathematical Physics,  Volume  2014 (2014)

Modulational instability analysis of the Peregrine soliton, U. Al Khawaja, H. Bahlouli, M. Asad-uz-zaman, and S. M. Al-Marzoug, Communications in Nonlinear Science and Numerical Simulation 19, 2706 (2014)

Directional flow of solitons with asymmetric potential wells: Soliton diode, M. Asad-uz-zaman and U. Al Khawaja, Europhysics Letters 101, 50008 (2013)

Modification of roton instability due to the presence of a second dipolar Bose-Einstein condensate, M. Asad-uz-Zaman and D. Blume, Physical Review A 83, 033616 (2011)

Tuning the structural and dynamical properties of a dipolar Bose-Einstein condensate: Ripples and instability islands, M. Asad-uz-Zaman and D. Blume, New Journal of Physics 12, 065022 (2010)

Aligned dipolar Bose-Einstein condensate in a double-well potential: From cigar-shaped to pancakeshaped, M. Asad-uz-Zaman and D. Blume, Physical Review A 80, 053622 (2009)

References

1. Blume, Professor, Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, Norman, USA. Phone: (405) 325-6079; Email: Doerte.Blume-1@ou.edu

1. Al Khawaja, Professor, Physics Department, United Arab Emirates University, Al Ain, United Arab Emirates.

Phone: +971504724143; Email: u.alkhawaja@uaeu.ac.ae

PHY107

PHY108

PHY108L

The research I conducted in my PhD is the mean-field study of dipolar Bose-Einstein condensates (BECs). In particular, I extensively studied the properties of dipolar Bose-Einstein condensates loaded into a double well potential by solving the Gross-Pitaevskii and Bogoliubov de Gennes equations numerically. I also studied the properties of two dipolar Bose-Einstein condensates loaded into two separate traps by numerically solving the coupled Gross-Pitaevskii and Bogoliubov de Gennes equations.

The experimental realization of BEC in 1995 opens a new and unexpected playground for physicist to explore the complicated phenomena in other branches of physics. Some of the key parameters, which determine the physics of the system, can be controlled. Therefore, the effect of these parameters can be understood in a clean and clear model system. Next few years, extensive work, both experimentally and theoretically, has been done on systems with isotropic short-range interaction. The constituent atoms of BECs has also dipole moment, however small. Dipole-dipole interaction is long-ranged and angle dependent. Since the strength of the isotropic short-range interaction can be tuned to vanish, the effect of the dipole-dipole interaction can be observed. Theoretical studies of purely dipolar BECs shows interesting mechanical and dynamical properties compared to isotropic short-range interacting BECs. The first dipolar BEC was observed with chromium atoms in 2005.

I did some work on the nonlinear dynamics as well. Specifically, the work on the generation of rogue waves and how to manage these waves by external potentials. Rogue wave is a special type of nonlinear wave which has much larger amplitude compared to the background wave. It is localized both in space and time and has the property that it appears from nowhere and disappears without a trace. One of the simplest models for rogue wave is the Peregrine solution which has the form of a rational function. By using Darboux transformation, a technique commonly used to solve nonlinear Schroedinger equations by transforming the original equation by a set of linear equations of an auxiliary field, all the higher order Peregrine solutions can be obtained. For managing or exciting the rogue wave, we study the rogue wave dynamics by preparing an initial state and evolving it with real time. Another study we pursued is the soliton interaction with different potentials, i.e., impurity in optical fibers. This is one of the key factors which control the bit rate in optical fiber communication system. Soliton is a type of solution of the nonlinear Schroedinger equation with the property that it can travel a long distance without change in shape. This has been used in optical communications and realized in Bose-Einstein condensates recently. The study shows that the soliton can be reflected by a potential well, which is not possible classically. Another interesting property is the existence of a critical velocity below which a soliton reflected almost perfectly and above which the soliton can transmit nearly completely accompanied by a reduction in the center of mass velocity by a certain type of potential wells. We have shown that these two effects can be used to design a soliton diode.