Wyniki wyszukiwania dla: HEISENBERG MODEL

• Quantum corrections to 4 model solutions and applications to Heisenberg chain dynamics

  Publikacja

  • S. Leble
  • G. Kwiatkowski

  - CENTRAL EUROPEAN JOURNAL OF PHYSICS - Rok 2013

  The Heisenberg spin chain is considered in φ^4 model approximation. Quantum corrections to classical solutions of the one-dimensional φ^4 model within the correspondent physics are valuated with account of rest d − 1 dimensions of a d-dimensional theory. A quantization of the model is considered in terms of space- time functional integral. The generalized zeta-function formalism is used to renormalize and evaluate the functional...

  Pełny tekst do pobrania w portalu

• Quantum corrections to phi^4 model solutions and applications to Heisenberg chain dynamics

  Publikacja

  • G. Kwiatkowski
  • S. Leble

  - CENTRAL EUROPEAN JOURNAL OF PHYSICS - Rok 2013

  The Heisenberg spin chain is considered in φ^4 model approximation. Quantum corrections to classical solutions of the one-dimensional φ^4 model within the correspondent physics are evaluated with account of rest d−1 dimensions of a d-dimensional theory. A quantization of the model is considered in terms of spacetime functional integral. The generalized zeta-function formalism is used to renormalize and evaluate the functional integral...

  Pełny tekst do pobrania w portalu

• Quantum metrology: Heisenberg limit with bound entanglement

  Publikacja

  • Ł. Czekaj
  • A. Przysiężna
  • M. Horodecki
  • P. Horodecki

  - PHYSICAL REVIEW A - Rok 2015

  Quantum entanglement may provide a huge boost in the precision of parameter estimation. However, quantum metrology seems to be extremely sensitive to noise in the probe state. There is an important still open question: What type of entanglement is useful as a resource in quantum metrology? Here we raise this question in relation to entanglement distillation. We provide a counterintuitive example of a family of bound entangled states...

  Pełny tekst do pobrania w portalu

• At the Limits of Criticality-Based Quantum Metrology: Apparent Super-Heisenberg Scaling Revisited

  Publikacja

  • M. Rams
  • P. Sierant
  • O. Dutta
  • P. Horodecki
  • J. Zakrzewski

  - Physical Review X - Rok 2018

  We address the question of whether the super-Heisenberg scaling for quantum estimation is indeed realizable. We unify the results of two approaches. In the first one, the original system is compared with its copy rotated by the parameter-dependent dynamics. If the parameter is coupled to the one-body part of the Hamiltonian, the precision of its estimation is known to scale at most as N−1 (Heisenberg scaling) in terms of the number...

  Pełny tekst do pobrania w portalu

• Geoscientific Model Development

  Czasopisma

  ISSN: 1991-959X , eISSN: 1991-9603

• STOCHASTIC MODELS

  Czasopisma

  ISSN: 1532-6349 , eISSN: 1532-4214

• GRAPHICAL MODELS

  Czasopisma

  ISSN: 1524-0703 , eISSN: 1524-0711

• Finite Element model updating on experimental modal parameters

  Publikacja

  • M. Hirsz

  - Rok 2008

• Model Assisted Statistics and Applications

  Czasopisma

  ISSN: 1574-1699

• Journal of Public Health-Heidelberg

  Czasopisma

  ISSN: 0943-1853 , eISSN: 1613-2238