Dr.Gehad Sadiek
Academic RankAssociate Professor

- PhD. Theoretical Condensed Matter Physics

- - Condensed matter Physics. - Strongly correlated electron systems. - Quantum entanglement and decoherence in nonlinear quantum systems. - Quantum computing and Quantum information processing. - Open quantum systems. - Quantum phase transitions and critical phenomena and Electron transportation in mesoscopic systems.

- gsadiek@sharjah.ac.ae
- +97165050314

- Doctorate of Philosophy, Physics, December 2002 Purdue University, West Lafayette, IN, USA.
- Master of Science, Physics, May 2000. Purdue University, West Lafayette, IN, USA.
- ICTP Condensed Matter Diploma, August 1995 International Center for Theoretical Physics, ICTP, Trieste, Italy
- Master of Science, Physics, August 1994 Ain Shams University, Cairo, Egypt.
- Bachelor of Science, Physics, May 1988 Ain Shams University, Cairo, Egypt.

- Associate Professor, Department of Applied Physics, College of Science, University of Sharjah, Sharjah, UAE (September 2014 – Present).
- Associate Professor, Physics Department, College of Science, King Saud University, Riyadh, Saudi Arabia (January 2011 – August 2014).
- Assistant Professor, Physics Department, College of Science, King Saud University, Riyadh, Saudi Arabia (September 2004 – January 2011).
- Assistant Professor, Physics Department,Faculty of Science, AinShamsUniversity, Cairo, Egypt (January 2004 – September 2004).
- Visiting faculty, Physics Department and Chemistry Department, Purdue University (December 2002 – January 2004).
- Visiting faculty, Physics Department, Purdue University (every summer semester since July 2004 till now).
- Teaching Assistant, Physics Department, Purdue University (1997-2002).
- Physics Instructor, Physics department, Ain Shams University (1990-1994)-(1995-1997).

- Member of the American Physical Society(APS).

- ”Entanglement and Decoherence in Quantum Computing Systems” Saudi National Plan for Science and Technology, 900,000 SR, 1/4/2012 - 30/3/2015. PI: Gehad Sadiek
- ”Investigation of quantum phase transition in Heisenberg spin systems using finite size scaling” Deanship of research and graduate studies, University of Sharjah(20,000 AED), 1/3/2015 – 30/8/2016. PI: Gehad Sadiek
- ”Dynamics of quantum entanglement in Heisenberg spin systems coupled to a dissipative environment” Deanship of research and graduate studies, University of Sharjah (80,000 AED), 1/11/2016 31/10/2018. PI: Gehad Sadiek

- E. I. Lashin and Gehad Sadiek, “An ansatz for the solution of Lindblad masterequation with dynamical system theory implementation." (Under review for publication)
- Gehad Sadiek, Wiam Al-Drees, and M. Sebaweh Abdallah, "Manipulating entanglement sudden death in two coupled two-level atoms interacting off-resonance with a radiation field: an exact treatment"
- Gehad Sadiek, “Impurity effect on entanglement asymptotic state in one-dimensional Ising system coupled to a dissipative environment," J. Phys.: Conf. Series 869 (2017) 012022.
- GehadSadiek, and Samaher Almalki, “Entanglement dynamics in Heisenberg spin chains coupled to a dissipative environmentat finite temperature," Phys. Rev. A 94, 012341 (2016), arXiv:1604.02689.
- E. I. Lashin, Gehad Sadiek, Sebawe Abdullah and Elham Aldefeery, "Two driven coupled qubits in a time-varying magnetic field: exact and approximate solutions,"Appl. Math. Inf. Sci. 8, No. 3, 1-14 (2014).arXiv:1312.6883.
- Gehad Sadiek, Gehad Sadiekand Sabre Kais, “Persistence of entanglement in thermal states of spin systems” J. Phys. B: At. Mol. Opt. Phys. 46 245501 (2013), arXiv:1301.0122[quant-ph].
- Gehad Sadiek, Qing Xu, and Sabre Kais, “Tuning entanglement and ergodicity in two-dimensional spin system using impurities and anisotropy," Phys. Rev. A85, 042313 (2012), arXiv: quant-ph/1204.0759.
- Bedoor Alkurtass, Gehad Sadiek, and Sabre Kais, "Entanglement dynamics of one-dimensional driven spin systems in time-varying magnetic fields," Phys. Rev. A 84, 022314 (2011), arXiv: quant-ph/1104.3521.
- Qing Xu, Gehad Sadiek and Sabre Kais, "Dynamics of entanglement in a twodimensional spin system,"Phys. Rev. A 83, 062312 (2011),arXiv: quantph/1101.5784v1. (2011).
- Gehad Sadiek, "Dynamics of thermal entanglement of anisotropically coupled two-qubit system in a time-dependent magnetic field," NuovoCimento B 125, 1529 (2010).
- Gehad Sadiek, Bedoor Alkurtass, and Omar Aldossary, "Entanglement in a time-dependent coupled XY spin chain in an external magnetic field,"Phys. Rev. A82, 052337 (2010), arXiv: quant-ph/1009.0648.
- G. Sadiek, E. I. Lashin and M. Sebawe Abdullah, "Dynamics of Entanglement of a two-qubit system with anisotropic XYZ exchange coupling in a non-uniform external magnetic field," Physica B404, 1719 (2009).
- G. Sadiek, Z. Huang, Omar Aldossary and Sabre Kais," Nuclear-induced time evolution of entanglement of two-electron spins in a coupled quantum dot," Mol. Phys.106, 1777 (2008),arXiv:cond mat/0703054.
- M. Sebawe Abdullah, E. I. Lashin and G. Sadiek, "Entropy and variance squeezing for time-dependent two coupled atoms in an external magnetic field," J. Phys. B 41, 015502 (2008).
- Z. Huang, G. Sadiek, S. Kais, "Time evolution of a single spininhomogenouslycoupled to an interacting spin environment,"J. Chem. Phys. 124, 144513 (2006).
- S. Khlebnikov and G. Sadiek, “Decoherence by a nonlinear environment: canonical vs. microcanonical case,” Phys. Rev. A 66, 032312 (2002), arXiv:quant-ph/0202125.
- M. Crogan, S. Khlebnikov and G. Sadiek, “Controlled transfer of quantum
- Gehad Sadiek, Qing Xu, and Sabre Kais, “Dynamics of entanglement in one and two-dimensional spin systems,”review chapter in Quantum Information and Computation for Chemistry: Advances in Chemical Physics, Volume 154, 443-501 (2013). http://arxiv.org/abs/1304.5569. amplitude via modulation of a potential barrier: numerical study in a model of SQUID,” Supercond. Sci. and Technol. 15, 8 (2002), arXiv:quant-ph/0105038.
- R. Hlubina and G. Sadiek, “Isotope effect on exchange in antiferromagnetic insulators,” Phys. Rev. B 55, 2733 (1997).

Theses
- G. Sadiek (2002), Decoherence in Nonlinear quantum systems, Ph. D. thesis, under supervision of Prof. S. Khlebnikov (Purdue University, West Lafayette,
Indiana, USA).
- G. Sadiek (1995), Isotope effect on exchange in antiferromagnetic insulators, ICTP Diploma thesis, under supervision of Prof. R. Hlubina (ICTP, Trieste, Italy).
- G. Sadiek (1994), Investigation of Resonance in inelastic collision of Positron with Alkali atoms using the method of complex coordinates, M.S. thesis, under supervision of Prof. M.A. Abdel-Raouf (Ain Shams University, Cairo, Egypt).
Graduate Students Supervision
- Bedoor Alkurttass, 2007-2010, “Dynamics of Quantum Entanglement of anisotropic Heisenberg XY Spin Chain in an External Magnetic Field.”
- Nourah Elanazy, 2008-2011, “Electron transport properties in coupled quantum dots inthe Kondo regime.”
- Elham Alzefary, 2010-2013, “Entanglement of a Two-Qubit With anisotropic Heisenberg XYZ Exchange interaction coupled to a dissipative environment.”
- Arwa Bahlouly, 2012-2015, “Application of finite size scaling to quantum mechanical systems at critical points.”
- Samaher Almalky, 2013-2016, “Dynamics of spin systems coupled to a dissipative environment.”
- Wiam Aldrees, 2013-2017, “Dynamics of a two-qubit system coupled to a radiation field.”
- Habiba Almutari, 2014-2017, “Investigating quench dynamics in Heisenberg spin systems with long range interactions.”

- Purdue Research Foundation (PRF) distinguished graduate fellowship, Purdue University (2000-2002).
- One of the top ten teaching assistants during my Ph.D. years according to the classification of the Physics Department, Purdue University.
- Elected member of the faculty-graduate committee, Physics Department, Purdue University (2001-2002).
- President of the Egyptian Students Association in North America (2000-2001).
- ICTP Diploma fellowship, International Center for Theoretical Physics (Trieste, Italy) (1994-1995).