Search results for: QUANTUM STATE INFORMATION

• Objectivity in a Noisy Photonic Environment through Quantum State Information Broadcasting

  Publication

  • J. Korbicz
  • P. Horodecki
  • R. Horodecki

  - PHYSICAL REVIEW LETTERS - Year 2014

  Recently, the emergence of classical objectivity as a property of a quantum state has been explicitly derived for a small object embedded in a photonic environment in terms of a spectrum broadcast form—a specific classically correlated state, redundantly encoding information about the preferred states of the object in the environment. However, the environment was in a pure state and the fundamental problem was how generic and robust...

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• Superadditivity of two quantum information resources

  Publication

  • M. Nawareg
  • S. Muhammad
  • P. Horodecki
  • M. Bourennane

  - Science Advances - Year 2017

  Entanglement is one of the most puzzling features of quantum theory and a principal resource for quantum information processing. It is well known that in classical information theory, the addition of two classical information resources will not lead to any extra advantages. On the contrary, in quantum information, a spectacular phenomenon of the superadditivity of two quantum information resources emerges. It shows that quantum...

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• Semi-definite programming and quantum information

  Publication

  • P. A. Mironowicz

  - Journal of Physics A-Mathematical and Theoretical - Year 2024

  This paper presents a comprehensive exploration of semi-definite programming (SDP) techniques within the context of quantum information. It examines the mathematical foundations of convex optimization, duality, and SDP formulations, providing a solid theoretical framework for addressing optimization challenges in quantum systems. By leveraging these tools, researchers and practitioners can characterize classical and quantum correlations,...

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• Aspects of multistation quantum information broadcasting

  Publication

  • M. Demianowicz
  • P. Horodecki

  - PHYSICS LETTERS A - Year 2010

  We study quantum information transmission over multiparty quantum channel. In particular, we show an equivalence of different capacity notions and provide a multiletter characterization of a capacity region for a general quantum channel with k senders and m receivers. We point out natural generalizations to the case of two-way classical communication capacity. (C) 2010 Elsevier B.V. All rights reserved.

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• Local information as a resource in distributed quantum systems.

  Publication

  • M. Horodecki
  • K. Horodecki
  • P. Horodecki
  • R. Horodecki
  • J. Oppenheim
  • A. Sen(de)
  • U. Sen

  - PHYSICAL REVIEW LETTERS - Year 2003

  Zaproponowano nowy paradygmat dla kwantowego paradygmatu odległych laboratoriów w których informacja jest zasobem. W tym schemacie obserwatorzy dokonują destylacji informacji lokalnych stanów czystych.

• Termodynamics of quantum information systems - Hamiltonian description.

  Publication

  • R. Kalicki
  • M. Horodecki
  • P. Horodecki
  • R. Horodecki

  - Year 2004

  Przy użyciu podejścia hamiltonowskiego wyprowadzono wzór na pracę dla układów kwantowych zanurzonych w ciepłym otoczeniu.

• Applications of semi-definite optimization in quantum information protocols

  Publication

  • P. A. Mironowicz

  - Year 2016

  This work is concerned with the issue of applications of the semi-definite programming (SDP) in the field of quantum information sci- ence. Our results of the analysis of certain quantum information protocols using this optimization technique are presented, and an implementation of a relevant numerical tool is introduced. The key method used is NPA discovered by Navascues et al. [Phys. Rev. Lett. 98, 010401 (2007)]. In chapter...

• QUANTUM INFORMATION & COMPUTATION

  Journals

  ISSN: 1533-7146

• Direct estimation of linear and nonlinear functionals of quantum state

  Publication

  • A. Ekert
  • C. M. Alves
  • D. K. Oi
  • M. Horodecki
  • P. Horodecki
  • L. C. Kwek

  - PHYSICAL REVIEW LETTERS - Year 2002

  We present a simple quantum network, based on the controlled-SWAP gate, that can extract certain properties of quantum states without recourse to quantum tomography. It can be used as a basic building block for direct quantum estimations of both linear and nonlinear functionals of any density operator. The network has many potential applications ranging from purity tests and eigenvalue estimations to direct characterization of...

• Measuring quantum entanglement without prior state reconstruction.

  Publication

  • P. Horodecki

  - PHYSICS LETTERS B - Year 2003

  Wykazano, że w przypadku dwóch kubitów splątanie formowania może być mierzone bez rekonstrukcji stanu kwantowego.