Displaying 2077 - 2083 of 2083
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Discrete Wigner Functions and Quantum Computation
Ernesto Galvao Universidade Federal Fluminense
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Superselection Rules and Quantum Protocols
Dominic Mayers University of Sherbrooke
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Talk
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From nonlocality transitivity to resource marginal problems and back
Yeong-Cherng Liang National Cheng Kung University
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Quantum Foundations SeminarBayesian learning of Causal Structure and Mechanisms with GFlowNets and Variational Bayes
Mizu Nishikawa-Toomey Mila - Quebec Artificial Intelligence Institute
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s-ordered phase-space correspondences, fermions, and negativities
Ninnat Dangniam Naresuan University
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Nonclassicality in correlations without causal order
Ravi Kunjwal Aix-Marseille University
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Energy and speed bound in GPTs - VIRTUAL
Lorenzo Giannelli University of Hong Kong (HKU)
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Information dynamics or dynamics from information
Matteo Scandi Institute for Cross-Disciplinary Physics and Complex Systems (IFISC)
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Talk
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Symmetry enforced entanglement in maximally mixed states
Subhayan Sahu Perimeter Institute for Theoretical Physics
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Topological Quantum Information, Khovanov Homology and the Jones Polynomial
Louis Kauffman University of Illinois at Chicago
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Discrete Wigner Functions and Quantum Computation
Ernesto Galvao Universidade Federal Fluminense
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Quantum Information and Relativity Theory
Quantum mechanics, information theory, and relativity theory are the basic foundations of theoretical physics. The acquisition of information from a quantum system is the interface of classical and quantum physics. Special relativity imposes severe restrictions on the transfer of information between distant systems. Various applications will be presented. -
Superselection Rules and Quantum Protocols
Dominic Mayers University of Sherbrooke
Superselection rules are limitations on the physically realizable quantum operations that can be carried out by a local agent. For example, it is impossible to create or destroy an isolated particle that carries locally conserved charges, such as an electrically charged particle, a fermion, or (in a two dimensional medium) an anyon. Recently, Popescu has suggested that superselection rules might have interesting implications for the security of quantum cryptographic protocols. The intuitive idea behind this suggestion is that superselection rules could place inescapable limits on the cheating strategies available to the dishonest parties, thus enhancing security. Might, say, unconditionally secure bit commitment be possible in worlds (perhaps including the physical world that we inhabit) governed by suitable superselection rules? An affirmative answer could shake the foundations of cryptography. The purpose of this paper is to answer Popescu's intriguing question. Sadly, our conclusion is that superselection rules can never foil a cheater who has unlimited quantum computational power.