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A Dipolar Quantum Liquid Trapped in Quasi-One Dimension.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A Dipolar Quantum Liquid Trapped in Quasi-One Dimension./
作者:	Kao, Wil.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	129 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
Contained By:	Dissertations Abstracts International83-03B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28671275
ISBN:	9798544200543

A Dipolar Quantum Liquid Trapped in Quasi-One Dimension.
Kao, Wil.

A Dipolar Quantum Liquid Trapped in Quasi-One Dimension. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 129 p.

Source: Dissertations Abstracts International, Volume: 83-03, Section: B.

Thesis (Ph.D.)--Stanford University, 2021.

This item must not be sold to any third party vendors.

Highly excited eigenstates of interacting quantum systems are generically thermal; regardless of initial conditions, physical observables behave as they would in thermal equilibrium at times past the intrinsic dynamical time scale. Systems in which thermalization is absent are of great fundamental interest because they violate equilibrium statistical mechanics, and of technological interest because some quantum information encoded in these states evades decoherence. For the purpose of tackling this line of inquiry, ultracold neutral atoms in dilute gas offers a tabletop platform that is highly configurable, readily scalable, and well isolated from the environment.In this dissertation, I summarize our efforts of creating non-thermal states in a bosonic quantum gas of dysprosium, the most magnetic element, confined in quasi-one-dimensional waveguides. With long-range dipole-dipole repulsion that is two orders of magnitude stronger than alkali atoms, a highly excited super-Tonks-Girardeau gas is stabilized against collapse and thermalization. Stiffness and energy-per-particle measurements indicate that the system is dynamically stable regardless of contact strength. This metastability enables the cycling of contact interaction from weakly to strongly repulsive, then strongly attractive, and finally weakly attractive via two neighboring magnetically tuned collisional resonances. Iterating this quantum holonomy cycle constitutes an energy-space topological pump that creates a hierarchy of increasingly excited prethermal states. In addition to being the first systematic experimental investigation of a dipolar Luttinger liquid, the result opens up an unexplored regime of quantum control and may have wide-ranging implications for understanding the onset of chaos in near-integrable systems.

ISBN: 9798544200543Subjects--Topical Terms:

516296
Physics.

A Dipolar Quantum Liquid Trapped in Quasi-One Dimension.
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520 $a Highly excited eigenstates of interacting quantum systems are generically thermal; regardless of initial conditions, physical observables behave as they would in thermal equilibrium at times past the intrinsic dynamical time scale. Systems in which thermalization is absent are of great fundamental interest because they violate equilibrium statistical mechanics, and of technological interest because some quantum information encoded in these states evades decoherence. For the purpose of tackling this line of inquiry, ultracold neutral atoms in dilute gas offers a tabletop platform that is highly configurable, readily scalable, and well isolated from the environment.In this dissertation, I summarize our efforts of creating non-thermal states in a bosonic quantum gas of dysprosium, the most magnetic element, confined in quasi-one-dimensional waveguides. With long-range dipole-dipole repulsion that is two orders of magnitude stronger than alkali atoms, a highly excited super-Tonks-Girardeau gas is stabilized against collapse and thermalization. Stiffness and energy-per-particle measurements indicate that the system is dynamically stable regardless of contact strength. This metastability enables the cycling of contact interaction from weakly to strongly repulsive, then strongly attractive, and finally weakly attractive via two neighboring magnetically tuned collisional resonances. Iterating this quantum holonomy cycle constitutes an energy-space topological pump that creates a hierarchy of increasingly excited prethermal states. In addition to being the first systematic experimental investigation of a dipolar Luttinger liquid, the result opens up an unexplored regime of quantum control and may have wide-ranging implications for understanding the onset of chaos in near-integrable systems.
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