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Superselection Rules and Quantum Protocols
Dominic Mayers University of Sherbrooke
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Talk
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von Neumann algebraic quantum information theory and entanglement in infinite quantum systems
Lauritz van Luijk Leibniz University Hannover
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Learning and testing quantum states of fermionic systems
Antonio Mele Freie Universität Berlin
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A Criterion for Post-Selected Quantum Advantage
Matthew Fox University of Colorado Boulder
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Universal Microscopic Descriptions for Anomalies and Long-Range Entanglement
Ryohei Kobayashi Institute for Advanced Study (IAS)
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Quantum generators – from stochastic dynamics to Lindbladian extraction
Emilio Onorati Technical University of Munich (TUM)
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Talk
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Metainformation Enhancing Incompatibility Witnessing and Hybrid Computation
Teiko Heinosaari University of Jyväskylä
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Generic uniqueness, marginal entanglement, and entanglement transitivity
Mu-En Liu National Cheng Kung University
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Quantum complementarity: A novel resource for exclusion
Chung-yun Hsieh -
Why Bosons and Fermions? A Combinatorial Approach
Nicolás Medina Sánchez -
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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.