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Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases./
Author:	Putra, Andika.
Description:	1 online resource (285 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Contained By:	Dissertation Abstracts International79-11B(E).
Subject:	Atomic physics. -
Online resource:	click for full text (PQDT)
ISBN:	9780438149205

Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases.
Putra, Andika.

Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases. - 1 online resource (285 pages)

Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.

Thesis (Ph.D.)--University of Maryland, College Park, 2018.

Includes bibliographical references

Quantum degenerate gases have provided rich systems to simulate engineered Hamiltonians and to explore quantum many-body problems in laboratory-scale experiments. In this work, I focus on spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) of Rubidium-87 atoms realized using two-photon Raman coupling in which various novel phases are predicted to exist due to competing energies from the atomic internal structure, coupling strength, and many-body collisions.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780438149205Subjects--Topical Terms:

1182532
Atomic physics.
Index Terms--Genre/Form:

554714
Electronic books.

Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases.
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245 1 0 $a Magnetized Plane Wave and Stripe-ordered Phases in Spin-orbit-coupled Bose Gases.
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300 $a 1 online resource (285 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
500 $a Adviser: Steven Rolston.
502 $a Thesis (Ph.D.)--University of Maryland, College Park, 2018.
504 $a Includes bibliographical references
520 $a Quantum degenerate gases have provided rich systems to simulate engineered Hamiltonians and to explore quantum many-body problems in laboratory-scale experiments. In this work, I focus on spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) of Rubidium-87 atoms realized using two-photon Raman coupling in which various novel phases are predicted to exist due to competing energies from the atomic internal structure, coupling strength, and many-body collisions.
520 $a BECs are observed primarily using the interaction between light and matter, where it is common to probe the atoms with near-resonant light and image their shadow on a camera. This absorption imaging technique measures the integrated column density of the atoms and it is crucial to focus the imaging system. I present a systematic method to bring the ultracold atom systems into an optimal focus using the power spectral density (PSD) of the atomic density-density correlation function. The spatial frequency at which the defocus-induced artifacts first appear in the PSD is maximized at the focus. The focusing process thus identifies the range of spatial frequencies over which the PSD is uncontaminated by finite-thickness effects.
520 $a Next, I describe magnetic phases which exist in spin-1 spin-orbit-coupled condensates at a near-zero temperature. I observe ferromagnetic and unmagnetized phases which are stabilized by the locking between the spin and linear momentum of the system. Our measurements of both the first- and second-order transitions are in agreement with theory.
520 $a Finally, I discuss the stripe-ordered phase that occurs in SOC Bose gases favoring the miscibility configuration. The stripe phase is theoretically predicted to have an excitation spectrum analogous to that of a supersolid and to exhibit spatial density modulation within specific regions of parameter space. I used optical Bragg scattering to probe the small density modulation present in the atomic spatial distribution. I present for the very first time observation of the stripe phase in a Raman SOC Bose gas and its phase diagram in various parameter space. Our observations of the phase boundaries are consistent with theory and previous work.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
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650 4 $a Physics. $3 564049
650 4 $a Quantum physics. $3 1179090
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Maryland, College Park. $b Physics. $3 1186939
773 0 $t Dissertation Abstracts International $g 79-11B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10749500 $z click for full text (PQDT)