Citation:
Daniel Ben-Zion, John McGreevy, and Tarun Grover. 2020. “Disentangling quantum matter with measurements.” Phys. Rev. B, 101, Pp. 115131.
Ultra-Quantum Matter
Recent developments demonstrate that in the right circumstances, quantum aspects can extend to macroscopic scale. This is UQM.
Recent Publications
The negativity contour: a quasi-local measure of entanglement for mixed states
Citation:
J Kudler-Flam, H Shapourian, and S Ryu. 2020. “The negativity contour: a quasi-local measure of entanglement for mixed states.” SciPost Phys., 8, Pp. 63.
Searching for fracton orders via symmetry defect condensation
Citation:
Nathanan Tantivasadakarn and Sagar Vijay. 2020. “Searching for fracton orders via symmetry defect condensation.” Physical Review B, 101, Pp. 165143.
Fracton phases of matter
Citation:
Michael Pretko, Xie Chen, and Yizhi You. 2020. “Fracton phases of matter.” International Journal of Modern Physics A, 35, Pp. 2030003.
Abstract:
Fractons are a new type of quasiparticle which are immobile in isolation, but can often move by forming bound states. Fractons are found in a variety of physical settings, such as spin liquids and elasticity theory, and exhibit unusual phenomenology, such as gravitational physics and localization. The past several years have seen a surge of interest in these exotic particles, which have come to the forefront of modern condensed matter theory. In this review, we provide a broad treatment of fractons, ranging from pedagogical introductory material to discussions of recent advances in the field. We begin by demonstrating how the fracton phenomenon naturally arises as a consequence of higher moment conservation laws, often accompanied by the emergence of tensor gauge theories. We then provide a survey of fracton phases in spin models, along with the various tools used to characterize them, such as the foliation framework. We discuss in detail the manifestation of fracton physics in elasticity theory, as well as the connections of fractons with localization and gravitation. Finally, we provide an overview of some recently proposed platforms for fracton physics, such as Majorana islands and hole-doped antiferromagnets. We conclude with some open questions and an outlook on the field.On the asymptotics of wide networks with polynomial activations
Citation:
Kyle Aitken and Guy Gur-Ari. 2020. “On the asymptotics of wide networks with polynomial activations.” arXiv:2006.06687.
Quantization of Chern-Simons topological invariants for H-type and L-type quantum systems
Citation:
Oscar Randal-Williams, Lokman Tsui, and Xiao-Gang Wen. 2020. “Quantization of Chern-Simons topological invariants for H-type and L-type quantum systems.” arXiv:2008.02613.
Quantum Information Scrambling in a Trapped-Ion Quantum Simulator with Tunable Range Interactions
Citation:
Manoj K. Joshi, Andreas Elben, Benoît Vermersch, Tiff Brydges, Christine Maier, Peter Zoller, Rainer Blatt, and Christian F. Roos. 2020. “Quantum Information Scrambling in a Trapped-Ion Quantum Simulator with Tunable Range Interactions.” Physical Review Letters, 124, Pp. 240505.
Abstract:
In ergodic many-body quantum systems, locally encoded quantum information becomes, in the course of time evolution, inaccessible to local measurements. This concept of "scrambling"is currently of intense research interest, entailing a deep understanding of many-body dynamics such as the processes of chaos and thermalization. Here, we present first experimental demonstrations of quantum information scrambling on a 10-qubit trapped-ion quantum simulator representing a tunable long-range interacting spin system, by estimating out-of-time ordered correlators (OTOCs) through randomized measurements. We also analyze the role of decoherence in our system by comparing our measurements to numerical simulations and by measuring Rényi entanglement entropies.Copyright © 2024 The President and Fellows of Harvard College | Accessibility | Digital Accessibility | Report Copyright Infringement