Long-range entanglement and topological excitations

Torre, Gianpaolo; Odavić, Jovan; Fromholz, Pierre; Giampaolo, Salvatore Marco; Franchini, Fabio (2024) Long-range entanglement and topological excitations. SciPost Physics Core, 7 (3). ISSN 2666-9366

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Official URL: https://scipost.org/10.21468/SciPostPhysCore.7.3.0...

Abstract

Topological order comes in different forms, and its classification and detection is an important field of modern research. In this work, we show that the Disconnected Entanglement Entropy, a measure originally introduced to identify topological phases, is also able to unveil the long-range entanglement (LRE) carried by a single, fractionalized excitation. We show this by considering a quantum, delocalized domain wall excitation that can be introduced into a system by inducing topological frustration in an antiferromagnetic spin chain. Furthermore, we study the resilience of LRE against a quantum quench and the introduction of disorder, thus establishing the existence of a phase with topological features despite not being a typical topological order or symmetry-protected one.

Item Type:

Article

Uncontrolled Keywords:

Spin Chains; Frustration; Topological Phases; Quantum Excitation

Subjects:

NATURAL SCIENCES > Physics > Atomic and Molecular Physics
NATURAL SCIENCES > Physics > Condensed Matter Physics

Divisions:

Theoretical Physics Division

Projects:

Project title	Project leader	Project code	Project type
Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri-QuantiXLie	Hrvoje Buljan; Pavle Pandžić; Vit Tuček; Tomislav Marketin	KK.01.1.1.01.0004	EK
Frustrirani kompleksni sustavi-FCS	Salvatore Marco Giampaolo; Tena Dubček	IP-2019-04-3321	HRZZ
Skalabilni algoritmi visokih performansi za buduće heterogene distribuirane računalne sustave-HybridScale	Davor Davidović	UIP-2020-02-4559	HRZZ