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Probing non-equilibrium dynamics in ...

Chen, Cheng-An.

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Probing non-equilibrium dynamics in two-dimensional quantum gases

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Probing non-equilibrium dynamics in two-dimensional quantum gases/ by Cheng-An Chen.
作者:	Chen, Cheng-An.
出版者:	Cham :Springer International Publishing : : 2022.,
面頁冊數:	xiii, 148 p. :ill., digital ;24 cm.
附註:	"Doctoral Thesis accepted by Purdue University, USA."
內容註:	Chapter 1. Introduction -- Chapter 2. Experimental setup -- Chapter 3. Experimental procedure -- Chapter 4. Universal quench dynamics and townes soliton formation -- Chapter 5. Scale invariant townes solitons -- Chapter 6. Quasiparticle pair-production and quantum entanglement -- Chapter 7. A compact and versatile quantum gas machine -- Chapter 8. Summary.
Contained By:	Springer Nature eBook
標題:	Quantum theory. -
電子資源:	https://doi.org/10.1007/978-3-031-13355-8
ISBN:	9783031133558

Probing non-equilibrium dynamics in two-dimensional quantum gases
Chen, Cheng-An.

Probing non-equilibrium dynamics in two-dimensional quantum gases[electronic resource] /by Cheng-An Chen. - Cham :Springer International Publishing :2022. - xiii, 148 p. :ill., digital ;24 cm. - Springer theses,2190-5061. - Springer theses..

"Doctoral Thesis accepted by Purdue University, USA."

Chapter 1. Introduction -- Chapter 2. Experimental setup -- Chapter 3. Experimental procedure -- Chapter 4. Universal quench dynamics and townes soliton formation -- Chapter 5. Scale invariant townes solitons -- Chapter 6. Quasiparticle pair-production and quantum entanglement -- Chapter 7. A compact and versatile quantum gas machine -- Chapter 8. Summary.

This thesis explores the physics of non-equilibrium quantum dynamics in homogeneous two-dimensional (2D) quantum gases. Ultracold quantum gases driven out of equilibrium have been prominent platforms for studying quantum many-body physics. However, probing non-equilibrium dynamics in conventionally trapped, inhomogeneous atomic quantum gases has been a challenging task because coexisting mass transport and spreading of quantum correlations often complicate experimental analyses. In this work, the author solves this technical hurdle by producing ultracold cesium atoms in a quasi-2D optical box potential. The exquisite optical trap allows one to remove density inhomogeneity in a degenerate quantum gas and control its dimensionality. The author also details the development of a high-resolution, in situ imaging technique to monitor the evolution of collective excitations and quantum transport down to atomic shot-noise, and at the length scale of elementary collective excitations. Meanwhile, tunable Feshbach resonances in ultracold cesium atoms permit precise and dynamical control of interactions with high temporal and even spatial resolutions. By employing these state-of-the-art techniques, the author performed interaction quenches to control the generation and evolution of quasiparticles in quantum gases, presenting the first direct measurement of quantum entanglement between interaction quench generated quasiparticle pairs in an atomic superfluid. Quenching to attractive interactions, this work shows stimulated emission of quasiparticles, leading to amplified density waves and fragmentation, forming 2D matter-wave Townes solitons that were previously considered impossible to form in equilibrium due to their instability. This thesis unveils a set of scale-invariant and universal quench dynamics and provides unprecedented tools to explore quantum entanglement transport in a homogenous quantum gas.

ISBN: 9783031133558

Standard No.: 10.1007/978-3-031-13355-8doiSubjects--Topical Terms:

516552
Quantum theory.

LC Class. No.: QC174.12

Dewey Class. No.: 530.12

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520 $a This thesis explores the physics of non-equilibrium quantum dynamics in homogeneous two-dimensional (2D) quantum gases. Ultracold quantum gases driven out of equilibrium have been prominent platforms for studying quantum many-body physics. However, probing non-equilibrium dynamics in conventionally trapped, inhomogeneous atomic quantum gases has been a challenging task because coexisting mass transport and spreading of quantum correlations often complicate experimental analyses. In this work, the author solves this technical hurdle by producing ultracold cesium atoms in a quasi-2D optical box potential. The exquisite optical trap allows one to remove density inhomogeneity in a degenerate quantum gas and control its dimensionality. The author also details the development of a high-resolution, in situ imaging technique to monitor the evolution of collective excitations and quantum transport down to atomic shot-noise, and at the length scale of elementary collective excitations. Meanwhile, tunable Feshbach resonances in ultracold cesium atoms permit precise and dynamical control of interactions with high temporal and even spatial resolutions. By employing these state-of-the-art techniques, the author performed interaction quenches to control the generation and evolution of quasiparticles in quantum gases, presenting the first direct measurement of quantum entanglement between interaction quench generated quasiparticle pairs in an atomic superfluid. Quenching to attractive interactions, this work shows stimulated emission of quasiparticles, leading to amplified density waves and fragmentation, forming 2D matter-wave Townes solitons that were previously considered impossible to form in equilibrium due to their instability. This thesis unveils a set of scale-invariant and universal quench dynamics and provides unprecedented tools to explore quantum entanglement transport in a homogenous quantum gas.
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