Information processing using three-qubit and qubit-qutrit encodings of noncomposite quantum systems

A. A. Popov 1 E. O. Kiktenko 1 A. K. Fedorov 2, 3 V. I. Man'Ko 4, 5

Journal of Russian Laser Research, Springer Verlag, 2016, 37, pp.581

We study quantum information properties of a seven-level system realized by a particle in an one-dimensional square-well trap. Features of encodings of seven-level systems in a form of three-qubit or qubit-qutrit systems are discussed. We use the three-qubit encoding of the system in order to investigate subadditivity and strong subadditivity conditions for the thermal state of the particle. The qubit-qutrit encoding is employed to suggest a single qudit algorithm for calculation of parity of a bit string. Obtained results indicate on the potential resource of multilevel systems for realization of quantum information processing.

  • 1. Bauman Moscow State Technical University
  • 2. Russian Quantum Center
  • 3. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 4. MIPT - Moscow Institute of Physics and Technology [Moscow]
  • 5. P. N. Lebedev Physical Institute of the Russian Academy of Sciences