2016/05/31 by Gerardo Adesso, Thomas R. Bromley, Thomas R Bromley +1 · 2 citations
Computer Science · Mathematics · Physics and Astronomy · #Coherence (philosophical gambling strategy) #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum capacity #Quantum discord #Quantum entanglement #Quantum information #Quantum sensor #Quantum technology #Quantum teleportation #cond-mat.stat-mech #hep-th #math-ph #math.MP #physics.data-an #quant-ph
paper · pdf · doi:10.1088/1751-8113/49/47/473001
published as J. Phys. A: Math. Theor. 49, 473001 (2016) · The ABC of Quantum Correlations. 82 pages, 3 figures, 6 tables, 1 inequality wheel. Final version, published as a Topical Review in Journal of Physics A: Mathematical and Theoretical
openalex created_date 2016/06/24 · arxiv created 2016/11/07 · openalex publication_date 2016/11/07 · arxiv updated 2016/11/08 · openalex updated_date 2026/08/05
Quantum information theory is built upon the realisation that quantum resources like coherence and entanglement can be exploited for novel or enhanced ways of transmitting and manipulating information, such as quantum cryptography, teleportation, and quantum computing. We now know that there is potentially much more than entanglement behind the power of quantum information processing. There exist more general forms of non-classical correlations, stemming from fundamental principles such as the necessary disturbance induced by a local measurement, or the persistence of quantum coherence in all possible local bases. These signatures can be identified and are resilient in almost all quantum states, and have been linked to the enhanced performance of certain quantum protocols over classical ones in noisy conditions. Their presence represents, among other things, one of the most essential manifestations of quantumness in cooperative systems, from the subatomic to the macroscopic domain. In this work we give an overview of the current quest for a proper understanding and characterisation of the frontier between classical and quantum correlations (QCs) in composite states. We focus on various approaches to define and quantify general QCs, based on different yet interlinked physical perspectives, and comment on the operational significance of the ensuing measures for quantum technology tasks such as information encoding, distribution, discrimination and metrology. We then provide a broader outlook of a few applications in which quantumness beyond entanglement looks fit to play a key role.