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Tag: Physics

Causal orders, quantum circuits and spacetime: distinguishing between definite and superposed causal orders

Nikola Paunković1 and Marko Vojinović2 1Instituto de Telecomunicações and Departamento de Matemática, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1049-001, Lisboa, Portugal2Institute...

Energy upper bound for structurally stable $N$-passive states

Raffaele Salvia1 and Vittorio Giovannetti2 1Scuola Normale Superiore and University of Pisa, I-56127 Pisa, Italy2NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56126 Pisa, Italy...

Modelling equilibration of local many-body quantum systems by random graph ensembles

Daniel Nickelsen1,2,3 and Michael Kastner1,2 1National Institute for Theoretical Physics (NITheP), Stellenbosch 7600, South Africa2Institute of Theoretical Physics, Department of Physics, University of Stellenbosch,...

Scaling of variational quantum circuit depth for condensed matter systems

Carlos Bravo-Prieto1,2, Josep Lumbreras-Zarapico1, Luca Tagliacozzo1, and José I. Latorre1,3,4 1Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Universitat...

Amplification of quadratic Hamiltonians

Christian Arenz1, Denys I. Bondar2, Daniel Burgarth3, Cecilia Cormick4, and Herschel Rabitz1 1Frick Laboratory, Princeton University, Princeton NJ 08544, United States2Tulane University, New Orleans,...

Time crystallinity in open quantum systems

Andreu Riera-Campeny1, Maria Moreno-Cardoner1, and Anna Sanpera1,2 1Física Teòrica: Informació i Fenòmens Quàntics. Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain2ICREA, Passeig...

Quantum Natural Gradient

James Stokes1, Josh Izaac2, Nathan Killoran2, and Giuseppe Carleo3 1Center for Computational Quantum Physics and Center for Computational Mathematics, Flatiron Institute, New York, NY...

Ramsey interferometry with generalized one-axis twisting echoes

Marius Schulte, Victor J. Martínez-Lahuerta, Maja S. Scharnagl, and Klemens Hammerer Institut für Theoretische Physik und Institut für Gravitationsphysik (Albert-Einstein-Institut), Leibniz Universität Hannover, Appelstraße...

Classical simulation of linear optics subject to nonuniform losses

Daniel Jost Brod1 and Michał Oszmaniec2,3 1Instituto de Física, Universidade Federal Fluminense, Niterói, RJ, 24210-340, Brazil2International Centre for Theory of Quantum Technologies, University of...

Classical zero-knowledge arguments for quantum computations

Thomas Vidick1 and Tina Zhang2 1Department of Computing and Mathematical Sciences, California Institute of Technology, USA2Division of Physics, Mathematics and Astronomy, California Institute of...

Conditions for superdecoherence

Joris Kattemölle and Jasper van Wezel Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Amsterdam, The NetherlandsQuSoft, CWI, Science Park 123, Amsterdam,...

Don’t trust deep-learning algos to touch up medical scans: Boffins warn ‘highly unstable’ tech leads to bad diagnoses

Now is not the time for Hollywood 'zoom and enhance' fantasies

Be wary of medical scans enhanced by AI algorithms: the software is prone to making tiny errors that could lead to incorrect diagnoses, a study has warned.…

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