Advisors

Now showing items 1-16 of 16

    • The adiabatic and non-adiabatic behavior of a particle in optical lattices 

      Yılmaz, Fırat (Bilkent University, 2018-06)
      The cold atom experiments provide a clean and controlled environment for realizing many body systems. Recent realizations of artificial gauge fields and adjustable optical lattices paved the way for the study of effectively ...

    • Calculation of masses of dark solitons in 1D Bose-Einstein condensates using Gelfand Yaglom method 

      Yıldız, Kübra Işık (Bilkent University, 2016-11)
      Nonlinear excitations of Bose-Einstein condensates (BEC) play important role in understanding the dynamics of BECs. Solitons, shape preserving wave packets, are the most fundamental nonlinear excitations of BECs. They ...

    • Dark current control in InAs/GaSb superlattice photodetectors 

      Muti, Abdullah (Bilkent University, 2013)
      Bose-Einstein Condensation (BEC) was introduced by Einstein 1925. It took 70 years to confirm BEC by experiments. BEC creates a suitable environment to observe macroscopic-quantum behavior. Condensates consist of ultracold ...

    • Dipolar bose-einstein condensate in a cylindrically symmetric trap 

      Gültekin, Habib (Bilkent University, 2016-08)
      Bose-Einstein Condensate (BEC) and particularly its stability dynamics has been a subject to many investigations since the first realization of this new condensed state in alkali atoms interacting via short range potential. ...

    • Dynamics of a two leg ladder under a time dependent artificial magnetic field 

      Keskiner, Mehmet Akif (Bilkent University, 2019-09)
      Especially in the last two decades, there have been intensive theoretical and experimental studies on the periodically driven quantum systems. The reasons for these intensive studies are the emergence of new topological ...

    • Entanglement : quantification via uncertainties and search among ultracold bosons in optical lattices 

      Öztop, Barış (Bilkent University, 2009)
      In the first part of the Thesis, the known measures of entanglement for finite dimensional systems are reviewed. Both the simplest case of pure states that belong to bipartite systems and more general case of mixed states ...

    • Evolution of the hofstadter butterfly in a tunable optical lattice 

      Yılmaz, Fırat (Bilkent University, 2015-08)
      There are a limited number of exact solutions for quantum mechanical systems. It is critical to obtain solutions for complex systems. One of these unsolved equations was the famous Harpers equation, which was proposed ...

    • Mixtures of charged-neutral superfluids 

      Ünal, Fatmanur (Bilkent University, 2016-12)
      Motivated by the developments of artificial magnetic fields (AMFs) enabling cou- pling to the neutral particles of ultracold quantum gases, we have theoretically studied charged-neutral mixtures in various settings. The ...

    • Pairing in charged-neutral fermion mixtures under an artificial magnetic field 

      Ünal, Fatma Nur (Bilkent University, 2012)
      Bose-Einstein condensations (BEC), pairing behaviour, vortex formations in superconductivity and superfluidity are just a few examples of fascinating features of ultracold gases. In this thesis, we study charged-neutral ...

    • Quantum entanglement and light propagation through Bose-Einstein condensate (BEC) 

      Taşgın, Mehmet Emre (Bilkent University, 2009)
      We investigate the optical response of coherent media, a Bose-Einstein condensate (BEC), to intense laser pump stimulations and weak probe pulse propagation. First, we adopt the coherence in sequential superradiance ...

    • Quantum gases in rotating optical lattices 

      Umucalılar, Rifat Onur (Bilkent University, 2010)
      The thesis is structured into two main parts so as to cover bosons and fermions in rotating optical lattices separately. In the first part, after a brief introduction to ultracold atoms in optical lattices, we review the ...

    • Rotating two leg Bose Hubbard ladder 

      Keleş, Ahmet (Bilkent University, 2009)
      We analyze two leg Bose Hubbard model under uniform magnetic field within various methods. Before studying the model, we discuss the background on rotating Bose Einstein condensates, Bose Hubbard model and superfluid ...

    • Sonic Hawking Radiation from a blackhole laser 

      Ouf, Ahmed Refat Mohamed Mohamed (Bilkent University, 2018-06)
      The quantum thermal radiation from a black hole (BH) known as “Hawking Radiation” or “Black Hole Evaporation” results from studying quantum fields in the curved space-time of the horizon of a BH. Experimentally, the ...

    • Temperature dependent density profiles and collective oscillations of dipolar droplets 

      Aybar, Enes (Bilkent University, 2019-09)
      Dipolar droplets are a novel form of Bose gas that form in a regime where the mean field theory predicts collapse. In the literature, the beyond mean field e ects in the form of the Lee-Huang-Yang correction to the local ...

    • A variational approech to stationary and rotating Bose-Einstein condensates 

      Keçeli, Murat (Bilkent University, 2006)
      After the experimental demonstration of Bose-Einstein condensation (BEC) in alkali gases [6, 7, 18], the number of theoretical and experimental papers on ultracold atomic physics increased enormously [48]. BEC experiments ...

    • Vortex transfer in charged-neutral superfluid mixtures 

      Kaya, Semih (Bilkent University, 2013)
      Bose-Einstein Condensation (BEC) was introduced by Einstein 1925. It took 70 years to confirm BEC by experiments. BEC creates a suitable environment to observe macroscopic-quantum behavior. Condensates consist of ultracold ...