Lee Smolin

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Weekly Papers on Quantum Foundations (25)

Quantum theory is incompatible with relativity: A new proof beyond Bell’s theorem and a test of unitary quantum theories  Philsci-Archive: No conditions. Results ordered -Date Deposited. on 2019-6-29 12:08am GMT Gao, Shan (2019) Quantum theory is incompatible with relativity: A new proof beyond Bell’s theorem and a test of unitary quantum theories. [Preprint] The limits of quantum superposition: Should “Schr\”{o}dinger’s… Read more →

Weekly Papers on Quantum Foundations (15)

A new kind of cyclic universe. (arXiv:1904.08022v1 [gr-qc] CROSS LISTED)  hep-th updates on arXiv.org on 2019-4-20 12:59am GMT Authors: Anna Ijjas, Paul J. Steinhardt Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale factor grows by… Read more →

Weekly Papers on Quantum Foundations (13,14)

Searching for quantum black hole structure with the Event Horizon Telescope. (arXiv:1904.05287v1 [gr-qc] CROSS LISTED)  hep-th updates on arXiv.org on 2019-4-13 1:28am GMT Authors: Steven B. Giddings The impressive images from the Event Horizon Telescope sharpen the conflict between our observations of gravitational phenomena and the principles of quantum mechanics. Two related scenarios for reconciling quantum mechanics with the existence of… Read more →

Realism and Causality II: Retrocausality in Energetic Causal Sets

Eliahu Cohen, Marina Cortês, Avshalom C. Elitzur, Lee Smolin (Submitted on 13 Feb 2019 (v1), last revised 19 Mar 2019 (this version, v2)) https://arxiv.org/abs/1902.05082v2 We describe a new form of retrocausality, which is found in the behaviour of a class of causal set theories, called energetic causal sets (ECS). These are discrete sets of events, connected by causal relations. They have three orders:… Read more →

Realism and causality I: Pilot wave and retrocausal models as possible facilitators

Eliahu Cohen, Marina Cortês, Avshalom C. Elitzur, Lee Smolin (Submitted on 13 Feb 2019 (v1), last revised 19 Mar 2019 (this version, v2)) https://arxiv.org/abs/1902.05108v2 Of all basic principles of classical physics, realism should arguably be the last to be given up when seeking a better interpretation of quantum mechanics. We examine the de Broglie-Bohm pilot wave theory as a well developed example of… Read more →

Weekly Papers on Quantum Foundations (22)

Continuity of measurement outcomes. (arXiv:1805.12404v1 [quant-ph])  quant-ph updates on arXiv.org on 2018-6-02 3:59am GMT Authors: J. Sperling It is demonstrated that the collapse of the wave function is equivalent to the continuity of measurement outcomes. The latter states that a second measurement has to result in the same outcome as the first measurement of the same observable for a vanishing time… Read more →

Weekly Papers on Quantum Foundations (49)

Branches of the Black Hole Wave Function Need Not Contain Firewalls. (arXiv:1712.04955v1 [hep-th])  hep-th updates on arXiv.org on 2017-12-16 2:35am GMT Authors: Ning Bao, Sean M. Carroll, Aidan Chatwin-Davies, Jason Pollack, Grant N. Remmen We discuss the branching structure of the quantum-gravitational wave function that describes the evaporation of a black hole. A global wave function that initially describes a classical Schwarzschild geometry is continually… Read more →

Weekly Papers on Quantum Foundations (21)

Aspects of Symmetry, Topology and Anomalies in Quantum Matter. (arXiv:1602.05569v1 [cond-mat.str-el] CROSS LISTED)  quant-ph updates on arXiv.org on 2017-5-26 3:49am GMT Authors: Juven C. Wang In this thesis, we explore the aspects of symmetry, topology and anomalies in quantum matter with entanglement from both condensed matter and high energy theory viewpoints. The focus of our research is on the gapped many-body… Read more →