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Precision Measurements and Quantum Sensing Using Cold Atoms
Precision Measurements and Quantum Sensing Using Cold Atoms
Precision Measurements and Quantum Sensing Using Cold Atoms

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153005
ISBN  
9798384043898
DDC  
539
저자명  
Duspayev, Alisher.
서명/저자  
Precision Measurements and Quantum Sensing Using Cold Atoms
발행사항  
[Sl] : University of Michigan, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
240 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Raithel, Georg.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2024.
초록/해제  
요약Atoms cooled and trapped using laser light have become the backbone of modern quantum physics research. Various new applications based on laser-cooled atoms are in active development. The work described in this dissertation is dedicated to this endeavor. I present experimental and numerical investigations on several fundamental properties of the laser-cooled atoms in different quantum states and how they may translate into applications within several emerging atom-based technologies.First, I describe the precision measurements of the dynamic polarizability and photo-ionization cross-section at 1064-nm light of the 5D3/2 state in rubidium, which is of interest for the portable atomic clocks. Two different spectroscopic methods are implemented to extract the polarizability from the experimental data. The results are statistically equivalent: -524(17) [-499(59)] atomic units from the first [second] method. The photo-ionization cross section of the 5D3/2 state at 1064 nm is measured to be 44(1) Mb.The aforementioned photo-ionization cross section is suitable for efficient ion generation and the subsequent application in cold-atom-based ion sources. This is demonstrated in the second study presented here. The ion source employs a novel method to monitor the electric microfields of the ions using the Stark effect of the highly-excited (Rydberg) atoms seeded within the origin of the ion source. Rydberg atoms are extremely sensitive to electric fields and serve as an embedded real-time sensor and tracker of the ion-source performance because of their quasi-continuous creation and detection. The principles of such ion-microfield sensing are discussed and analyzed in detail and can be utilized in any cold-atom-based focused-ion-beam source.The hyperfine structure of the 4D3/2 state in rubidium is investigated next. The measurement utilizes two-photon optical absorption spectroscopy and a detailed analysis of light shifts. All four hyperfine components are resolved in the experimental data. The magnetic-dipole and electric-quadrupole hyperfine constants are obtained to be 7.419(45) MHz and 4.19(19) MHz, respectively. Future applications of the 4D3/2 state in optical atomic clocks and Rydberg-atom physics are discussed.Next, I investigate a Rydberg-atom-ion molecule bound by long-range multipolar forces. The molecule is the first example of a bound state between a Rydberg atom and an ion. Strong interactions between these two particles lead to large molecular binding energy (reaching a few GHz) and large binding length (exceeding 1 µm). The Born-Oppenheimer approximation does not hold for the Rydberg-atom-ion molecule because the motion of the Rydberg-atom nucleus is on the same timescale as the dynamics of the ion. The Born-Huang theory is utilized to investigate the resultant nonadiabatic dynamics of the molecule and to make the first fully quantum predictions of its lifetime as a function of the vibrational state and quantum principal number of the Rydberg atom.Lastly, I present a novel technique for atom interferometry that employs uninterrupted three-dimensional confinement and manipulation during the interferometric protocol. The atoms in the existing apparatuses have to follow several-meter-long trajectories along which various detrimental effects such as wave-packet dispersion erase useful phase information. "Tractor atom interferometry" presented here promises to suppress the harmful effects and improve the interferometers' sensitivity; provide flexible control over the atomic trajectories; and significantly reduce the experimental footprint. The suitability of this approach for measuring background acceleration (such as due to the gravitational field) is demonstrated. The sensitivity estimations, experimental considerations, and initial laboratory work are discussed.
일반주제명  
Molecular physics
일반주제명  
Physics
일반주제명  
Atomic physics
일반주제명  
Quantum physics
키워드  
Cold atoms
키워드  
Laser cooling
키워드  
Precision measurements
키워드  
Quantum technologies
키워드  
Rydberg atoms
키워드  
Optical physics
기타저자  
University of Michigan Physics
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a539
■1001  ▼aDuspayev,  Alisher.
■24510▼aPrecision  Measurements  and  Quantum  Sensing  Using  Cold  Atoms
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a240  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Raithel,  Georg.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2024.
■520    ▼aAtoms  cooled  and  trapped  using  laser  light  have  become  the  backbone  of  modern  quantum  physics  research.  Various  new  applications  based  on  laser-cooled  atoms  are  in  active  development.  The  work  described  in  this  dissertation  is  dedicated  to  this  endeavor.  I  present  experimental  and  numerical  investigations  on  several  fundamental  properties  of  the  laser-cooled  atoms  in  different  quantum  states  and  how  they  may  translate  into  applications  within  several  emerging  atom-based  technologies.First,  I  describe  the  precision  measurements  of  the  dynamic  polarizability  and  photo-ionization  cross-section  at  1064-nm  light  of  the  5D3/2  state  in  rubidium,  which  is  of  interest  for  the  portable  atomic  clocks.  Two  different  spectroscopic  methods  are  implemented  to  extract  the  polarizability  from  the  experimental  data.  The  results  are  statistically  equivalent:  -524(17)  [-499(59)]  atomic  units  from  the  first  [second]  method.  The  photo-ionization  cross  section  of  the  5D3/2  state  at  1064  nm  is  measured  to  be  44(1)  Mb.The  aforementioned  photo-ionization  cross  section  is  suitable  for  efficient  ion  generation  and  the  subsequent  application  in  cold-atom-based  ion  sources.  This  is  demonstrated  in  the  second  study  presented  here.  The  ion  source  employs  a  novel  method  to  monitor  the  electric  microfields  of  the  ions  using  the  Stark  effect  of  the  highly-excited  (Rydberg)  atoms  seeded  within  the  origin  of  the  ion  source.  Rydberg  atoms  are  extremely  sensitive  to  electric  fields  and  serve  as  an  embedded  real-time  sensor  and  tracker  of  the  ion-source  performance  because  of  their  quasi-continuous  creation  and  detection.  The  principles  of  such  ion-microfield  sensing  are  discussed  and  analyzed  in  detail  and  can  be  utilized  in  any  cold-atom-based  focused-ion-beam  source.The  hyperfine  structure  of  the  4D3/2  state  in  rubidium  is  investigated  next.  The  measurement  utilizes  two-photon  optical  absorption  spectroscopy  and  a  detailed  analysis  of  light  shifts.  All  four  hyperfine  components  are  resolved  in  the  experimental  data.  The  magnetic-dipole  and  electric-quadrupole  hyperfine  constants  are  obtained  to  be  7.419(45)  MHz  and  4.19(19)  MHz,  respectively.  Future  applications  of  the  4D3/2  state  in  optical  atomic  clocks  and  Rydberg-atom  physics  are  discussed.Next,  I  investigate  a  Rydberg-atom-ion  molecule  bound  by  long-range  multipolar  forces.  The  molecule  is  the  first  example  of  a  bound  state  between  a  Rydberg  atom  and  an  ion.  Strong  interactions  between  these  two  particles  lead  to  large  molecular  binding  energy  (reaching  a  few  GHz)  and  large  binding  length  (exceeding  1  µm).  The  Born-Oppenheimer  approximation  does  not  hold  for  the  Rydberg-atom-ion  molecule  because  the  motion  of  the  Rydberg-atom  nucleus  is  on  the  same  timescale  as  the  dynamics  of  the  ion.  The  Born-Huang  theory  is  utilized  to  investigate  the  resultant  nonadiabatic  dynamics  of  the  molecule  and  to  make  the  first  fully  quantum  predictions  of  its  lifetime  as  a  function  of  the  vibrational  state  and  quantum  principal  number  of  the  Rydberg  atom.Lastly,  I  present  a  novel  technique  for  atom  interferometry  that  employs  uninterrupted  three-dimensional  confinement  and  manipulation  during  the  interferometric  protocol.  The  atoms  in  the  existing  apparatuses  have  to  follow  several-meter-long  trajectories  along  which  various  detrimental  effects  such  as  wave-packet  dispersion  erase  useful  phase  information.  "Tractor  atom  interferometry"  presented  here  promises  to  suppress  the  harmful  effects  and  improve  the  interferometers'  sensitivity;  provide  flexible  control  over  the  atomic  trajectories;  and  significantly  reduce  the  experimental  footprint.  The  suitability  of  this  approach  for  measuring  background  acceleration  (such  as  due  to  the  gravitational  field)  is  demonstrated.  The  sensitivity  estimations,  experimental  considerations,  and  initial  laboratory  work  are  discussed.
■590    ▼aSchool  code:  0127.
■650  4▼aMolecular  physics
■650  4▼aPhysics
■650  4▼aAtomic  physics
■650  4▼aQuantum  physics
■653    ▼aCold  atoms
■653    ▼aLaser  cooling
■653    ▼aPrecision  measurements
■653    ▼aQuantum  technologies
■653    ▼aRydberg  atoms
■653    ▼aOptical  physics
■690    ▼a0748
■690    ▼a0605
■690    ▼a0609
■690    ▼a0599
■71020▼aUniversity  of  Michigan▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164466▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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