Wyniki wyszukiwania dla: quantum darwinism - MOST Wiedzy

Wyszukiwarka

Wyniki wyszukiwania dla: quantum darwinism

Wyniki wyszukiwania dla: quantum darwinism

  • Blurred quantum Darwinism across quantum reference frames

    Publikacja

    Quantum Darwinism describes objectivity of quantum systems via their correlations with their environment--information that hypothetical observers can recover by measuring the environments. However, observations are done with respect to a frame of reference. Here, we take the formalism of [Giacomini, Castro-Ruiz, & Brukner. Nat Commun 10, 494 (2019)], and consider the repercussions on objectivity when changing quantum reference...

    Pełny tekst do pobrania w portalu

  • Generic emergence of classical features in quantum Darwinism

    Publikacja

    - Nature Communications - Rok 2015

    Quantum Darwinism posits that only specific information about a quantum system that is redundantly proliferated to many parts of its environment becomes accessible and objective, leading to the emergence of classical reality. However, it is not clear under what conditions this mechanism holds true. Here we prove that the emergence of classical features along the lines of quantum Darwinism is a general feature of any quantum dynamics:...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Quantum security and theory of decoherence

    Publikacja

    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...

    Pełny tekst do pobrania w portalu

  • Quantum origins of objectivity

    Publikacja

    - PHYSICAL REVIEW A - Rok 2015

    In spite of all of its successes, quantum mechanics leaves us with a central problem: How does nature create a bridge from fragile quanta to the objective world of everyday experience? Here we find that a basic structure within quantum mechanics that leads to the perceived objectivity is a so-called spectrum broadcast structure. We uncover this based on minimal assumptions, without referring to any dynamical details or a concrete...

    Pełny tekst do pobrania w portalu

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

    Publikacja

    - PHYSICAL REVIEW LETTERS - Rok 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...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Non-Perfect Propagation of Information to a Noisy Environment with Self-Evolution

    Publikacja

    - ENTROPY - Rok 2022

    We study the non-perfect propagation of information for evolving a low-dimensional environment that includes self-evolution as well as noisy initial states and analyse the interrelations between the degree of objectivization and environment parameters. In particular, we consider an analytical model of three interacting qubits and derive its objectivity parameters. The numerical analysis shows that the quality of the spectrum broadcast...

    Pełny tekst do pobrania w portalu

  • Monitoring of the Process of System Information Broadcasting in Time

    One of the problems of quantum physics is how a measurement turns quantum, noncopyable data, towards copyable classical knowledge. We use the quantum state discrimination in a central system model to show how its evolution leads to the broadcasting of the information, and how orthogonalization and decoherence factors allow us to monitor the distance of the state in question to the one perfectly broadcasting information, in any...

    Pełny tekst do pobrania w serwisie zewnętrznym