Snowmass White Paper: New ideas for many-body quantum systems from string theory and black holes

Abstract

During the last two decades many new insights into the dynamics of strongly coupled quantum many-body systems have been obtained using gauge/gravity duality, with black holes often playing a universal role. In this white paper we summarize the results obtained and offer some outlook for future developments, including the ongoing mutually beneficial feedback loop with the study of more general, not necessarily holographic, quantum manybody systems. 5 Bounding finite temperature quantum dynamics 7 6 Late time many-body quantum chaos 9 7 Quantum information of many-body systems 10 8 The SYK model and beyond 11 9 Properties and Dynamics of Quark-Gluon Plasma 12 10 Far-from-equilibrium dynamics 14

Interior of helical black holes

“…When the temperature is low enough, the curves related to fields α, f, h has an oscillation regime close to the horizon. 5 At higher temperature, the oscillation behavior disappears. Note that in previous studies, no oscillation behavior was found for neutral black holes with scalar deformations [7].…”

Snowmass White Paper: Effective Field Theories for Condensed Matter Systems

“…Quantum entanglement is a central and unifying concept in many branches of quantum mechanics: from quantum information theory, through condensed matter theory, to quantum gravity. Some of these ideas have been discussed in separate white papers [166,167]. Here we focus on universal aspects of quantum entanglement dynamics that underpin the emergence of many-body statistical mechanics and which may be captured by a membrane effective field theory.…”

Snowmass White Paper: Implications of Quantum Gravity for Particle Physics

“…Although exploring the growing diversity of string theory "data" in search for underlying patterns may be a hopeful endeavor, it is hard to ignore that the earliest insight for the best-motivated conjectures, such as the absence of global symmetries or the holographic entropy bounds, actually originated from studying the properties of black holes. Exploring the properties of these fascinating objects under a diversity of circumstances in search for additional intuition has seen renewed interest in recent times; see, e.g., the recent review [53] and the Snowmass white papers [54][55][56]. Perhaps not coincidentally, recent progress on the black hole information puzzle forgoes input from perturbative string theory, relying instead on semiclassical gravity techniques [57,58], and renewing hopes that constraints such as the absence of global symmetries could be understood using similar techniques [9][10][11].…”