Work

Many-body entanglement and topology from uncertainties and measurement-induced modes

Year: 2022

Type: article

Abstract: We present universal characteristics of quantum entanglement and topology through virtual entanglement modes that fluctuate into existence in subsystem measurements. For generic interacting systems and extensive conserved quantities, these modes give rise to a statistical uncertainty which corresponds to entanglement entropies. Consequently, the measurement-induced modes provide directly observable route to entanglement and its scaling laws. Moreover, in topological systems, the measurement-induced edge modes give rise to quantized and nonanalytic uncertainties, providing easily accessible signatures of topology. Our work provides a much-needed direct method to probe the performance of emerging quantum simulators to realize entangled and topological states.

Source: Physical Review Research

DOI: 10.1103/physrevresearch.4.023200

Authors: Kim Pöyhönen, Ali G. Moghaddam, Teemu Ojanen

Institutions: Tampere University, Helsinki Institute of Physics, University of Tampere, Institute for Advanced Studies in Basic Sciences

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,621

Funder: Academy of Finland