Now showing items 1-13 of 13

    • 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 ...
    • Entanglement and its operational measure 

      Klyachko, A. A.; Öztop, B.; Shumovsky, A. S. (Springer New York LLC, 2006)
      An operational representation of concurrence measuring the entanglement of bipartite systems by means of averages of basic observables is discussed. We prove the validity of this representation for bipartite systems with ...
    • Entanglement in atom-photon systems 

      Can, Muhammet Ali (Bilkent University, 2004)
      In this work we propose a new principle from the point of view of quantum fluctuations of observables. This new principle can be considered as an operational definition of ME states. Moreover, we show the existence of ...
    • Entanglement of a single spin-1 object: An example of ubiquitous entanglement 

      Binicioǧlu, S.; Can, M. A.; Klyachko, A. A.; Shumovsky, A. S. (Springer New York LLC, 2007)
      Using a single spin-1 object as an example, we discuss a recent approach to quantum entanglement. [A.A. Klyachko and A.S. Shumovsky, J. Phys: Conf. Series 36, 87 (2006), E-print quant-ph/0512213]. The key idea of the ...
    • Entanglement, local measurements and symmetry 

      Klyachko, A. A.; Shumovsky, A. S. (Institute of Physics Publishing, 2003)
      AbstractAdefinition of entanglement in terms of local measurements is discussed.Namely, the maximum entanglement corresponds to the states that cause thehighest level of quantum fluctuations in all local measurements ...
    • Generic entangled states as the su(2) phase states 

      Binicioǧlu, S.; Çakir, Ö.; Klyachko, A. A.; Shumovsky, A. S. (World Scientific Publishing, 2005)
      We discuss an algebraic way to construct generic entangled states of qunits based on the polar decomposition of the su(2) algebra. In particular, we show that these states can be defined as eigenstates of certain Hermitian ...
    • Maximum entanglement and its proper measure 

      Klyachko, A. A.; Shumovsky, A. S. (Institute of Physics, 2004)
      We discuss a definition of maximally entangled states in terms of maximum uncertainty of corresponding measurements. We describe a method of construction of bases of maximally entangled states. The entangled states that ...
    • Multipole radiation in quantum domain 

      Shumovsky, Alexander S.; Can, M. Ali; Soykal, Öney (Springer, 2003)
      We review recent results based on the application of spherical wave representation to description of quantum properties of multipole radiation generated by atomic transitions. In particular, the angular momentum Angular ...
    • Operational measure of entanglement for pure states of bipartite systems 

      Klyachko, A. A.; Öztop, B.; Shumovsky, A. S. (Akademiai Kiado Rt., 2006-03)
      We show that the complete information about the amount of entanglement carried by a bipartite pure state of any dimension (qubits, qutrits, etc), is determined by a local quantity that can be measured for either party ...
    • Persistent entanglement in three-level atomic systems 

      Can, M. A.; Çakir, Ö.; Klyachko, A.; Shumovsky, A. (Institute of Physics Publishing Ltd., 2004)
      We discuss the evolution towards persistent entangled state in an atom-photon system. A maximally entangled state can be stabilized at a local minimum of the system by draining some energy, thus obtaining a persistent ...
    • Robust entanglement in atomic systems 

      Çakır, Özgür (Bilkent University, 2005)
      Various models for generation of robust atomic entangled states and their implementation with current accessible technologies are proposed and worked out. Deterministic creation of long living Bell states with respect ...
    • Semiclassical quantum computation solutions to the count to infinity problem: A brief discussion 

      Gökden, B. (World Scientific, 2005)
      In this paper we briefly define distance vector routingalgorithms, their advantages and possible drawbacks. On thesepossible drawbacks, currently widely used methods split horizonand poisoned reverse are defined and compared. ...
    • Single-particle entanglement 

      Can, M. A.; Klyachko, A.; Shumovsky, A. (Institute of Physics Publishing Ltd., 2005)
      Using the approach to quantum entanglement based on the quantum fluctuations of observables, we show the existence of perfect entangled states of a single 'spin-1' particle. We give physical examples related to photons and ...