Wyniki wyszukiwania dla: quantum information theory

• Quantum security and theory of decoherence

  Publikacja

  • P. A. Mironowicz

  - NEW JOURNAL OF PHYSICS - Rok 2022

  We sketch a relation between two crucial, yet independent, fields in quantum information research, viz. quantum decoherence and quantum cryptography. We investigate here how the standard cryptographic assumption of shielded laboratory, stating that data generated by a secure quantum device remain private unless explicitly published, is disturbed by the einselection mechanism of quantum Darwinism explaining the measurement process...

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• Superadditivity of two quantum information resources

  Publikacja

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

  - Science Advances - Rok 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

  Publikacja

  • P. A. Mironowicz

  - Journal of Physics A-Mathematical and Theoretical - Rok 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

  Publikacja

  • M. Demianowicz
  • P. Horodecki

  - PHYSICS LETTERS A - Rok 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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• Structure of the Resource Theory of Quantum Coherence

  Publikacja

  • A. Streltsov
  • S. Rana
  • P. Boes
  • R. Eisert

  - PHYSICAL REVIEW LETTERS - Rok 2017

  Quantum coherence is an essential feature of quantum mechanics which is responsible for the departure between the classical and quantum world. The recently established resource theory of quantum coherence studies possible quantum technological applications of quantum coherence, and limitations that arise if one is lacking the ability to establish superpositions. An important open problem in this context is a simple characterization...

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• On mixed states entanglement and quantum communication: aspects of quantum channels theory

  Publikacja

  • P. Horodecki

  - ACTA PHYSICA POLONICA A - Rok 2002

  Dokonano przeglądu związków miedzy stanami kwantowymi oraz kwantowymi kanałami. Wykazano, że istnienie nietypowych korelacji kwantowych (splątanie związane typu NPT) w pewnych sytuacjach pociąga za sobą nieaddytywność pojemności kanałów kwantowych.

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• Termodynamics of quantum information systems - Hamiltonian description.

  Publikacja

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

  - Rok 2004

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

• Local information as a resource in distributed quantum systems.

  Publikacja

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

  - PHYSICAL REVIEW LETTERS - Rok 2003

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

• Product Graph Invariants with Applications in the Theory of Information

  Publikacja

  • M. Jurkiewicz
  • M. Kubale

  - Rok 2012

  There are a large number of graph invariants. In the paper, we consider some of them, e.g. the independence and chromatic numbers. It is well know that we cannot efficiently calculate these numbers for arbitrary graphs. In the paper we present relations between these invariants and concepts from the theory of information. Concepts such as source coding and transmission over a noisy channel with zero probability of error are modeled...

• Applications of semi-definite optimization in quantum information protocols

  Publikacja

  • P. A. Mironowicz

  - Rok 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...