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Foundational Theoretical Issues of Quantum Heat Engines and Hot Entanglement- [electronic resource]
Foundational Theoretical Issues of Quantum Heat Engines and Hot Entanglement- [electronic resource]

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자료유형  
 학위논문
Control Number  
0016931266
International Standard Book Number  
9798379757670
Dewey Decimal Classification Number  
530.1
Main Entry-Personal Name  
Arisoy, Onat.
Publication, Distribution, etc. (Imprint  
[S.l.] : University of Maryland, College Park., 2023
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2023
Physical Description  
1 online resource(207 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
General Note  
Advisor: Hu, Bei-Lok.
Dissertation Note  
Thesis (Ph.D.)--University of Maryland, College Park, 2023.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약We study open quantum systems in the contexts of quantum heat engines, refrigerators and quantum entanglement in systems in contact with high temperature reservoirs. Emphasizing the underlying theoretical foundations rather than practical aspects such as enhancement in efficiency of engines and refrigerators or in entanglement measures for a particular set of system and bath parameters, this work focuses on some important aspects of open quantum systems and quantum thermodynamics and provide in-depth analysis of them using relatively simple yet robust models in non- equilibrium statistical mechanics. These examples include a refrigerator for quantum many-body systems in the Markovian regime, a single harmonic oscillator quantum Otto cycle with its generalization to squeezed thermal baths and the entanglement dynamics of two coupled harmonic oscillators each having its own separate thermal baths in the non-Markovian regime. The investigation of these setups in a unified context in this dissertation also brings up the discussion on the validity of Markovian approximation for open quantum systems and the qualitative differences in Markovian versus non-Markovian open system dynamics, which is addressed on multiple occasions throughout the cases we study. Our analysis of quantum Otto cycle with squeezed thermal reservoirs show that the efficiency of the cycle does not change due to the squeezing in the bath in contrast to previous works studying the same cycle restricted by Markovian assumptions. In our investigation of the effects of time-dependent coupling in a system of two harmonic oscillators with two separate baths in both Markovian and non-Markovian regimes, we find that the driving-induced instability of the solutions of the Langevin equations of the oscillator system is necessary to sustain entanglement at late times with hot reservoirs which mayrender hot entanglement untenable. The effects of Markovianity/non-Markovianity, non-thermal reservoirs, contact with multiple reservoirs and time-dependent system Hamiltonians in quantum thermodynamics are addressed in this thesis.
Subject Added Entry-Topical Term  
Quantum physics.
Subject Added Entry-Topical Term  
Thermodynamics.
Subject Added Entry-Topical Term  
Physics.
Index Term-Uncontrolled  
Entanglement
Index Term-Uncontrolled  
Open quantum systems
Index Term-Uncontrolled  
Quantum heat engines
Index Term-Uncontrolled  
Quantum thermodynamics
Added Entry-Corporate Name  
University of Maryland, College Park Chemical Physics
Host Item Entry  
Dissertations Abstracts International. 84-12B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:640994

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530.1
■1001  ▼aArisoy,  Onat.▼0(orcid)0000-0002-3736-2369
■24510▼aFoundational  Theoretical  Issues  of  Quantum  Heat  Engines  and  Hot  Entanglement▼h[electronic  resource]
■260    ▼a[S.l.]▼bUniversity  of  Maryland,  College  Park.  ▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a1  online  resource(207  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  84-12,  Section:  B.
■500    ▼aAdvisor:  Hu,  Bei-Lok.
■5021  ▼aThesis  (Ph.D.)--University  of  Maryland,  College  Park,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aWe  study  open  quantum  systems  in  the  contexts  of  quantum  heat  engines,  refrigerators  and  quantum  entanglement  in  systems  in  contact  with  high  temperature  reservoirs.  Emphasizing  the  underlying  theoretical  foundations  rather  than  practical  aspects  such  as  enhancement  in  efficiency  of  engines  and  refrigerators  or  in  entanglement  measures  for  a  particular  set  of  system  and  bath  parameters,  this  work  focuses  on  some  important  aspects  of  open  quantum  systems  and  quantum  thermodynamics  and  provide  in-depth  analysis  of  them  using  relatively  simple  yet  robust  models  in  non-  equilibrium  statistical  mechanics.  These  examples  include  a  refrigerator  for  quantum  many-body  systems  in  the  Markovian  regime,  a  single  harmonic  oscillator  quantum  Otto  cycle  with  its  generalization  to  squeezed  thermal  baths  and  the  entanglement  dynamics  of  two  coupled  harmonic  oscillators  each  having  its  own  separate  thermal  baths  in  the  non-Markovian  regime.  The  investigation  of  these  setups  in  a  unified  context  in  this  dissertation  also  brings  up  the  discussion  on  the  validity  of  Markovian  approximation  for  open  quantum  systems  and  the  qualitative  differences  in  Markovian  versus  non-Markovian  open  system  dynamics,  which  is  addressed  on  multiple  occasions  throughout  the  cases  we  study.  Our  analysis  of  quantum  Otto  cycle  with  squeezed  thermal  reservoirs  show  that  the  efficiency  of  the  cycle  does  not  change  due  to  the  squeezing  in  the  bath  in  contrast  to  previous  works  studying  the  same  cycle  restricted  by  Markovian  assumptions.  In  our  investigation  of  the  effects  of  time-dependent  coupling  in  a  system  of  two  harmonic  oscillators  with  two  separate  baths  in  both  Markovian  and  non-Markovian  regimes,  we  find  that  the  driving-induced  instability  of  the  solutions  of  the  Langevin  equations  of  the  oscillator  system  is  necessary  to  sustain  entanglement  at  late  times  with  hot  reservoirs  which  mayrender  hot  entanglement  untenable.  The  effects  of  Markovianity/non-Markovianity,  non-thermal  reservoirs,  contact  with  multiple  reservoirs  and  time-dependent  system  Hamiltonians  in  quantum  thermodynamics  are  addressed  in  this  thesis.
■590    ▼aSchool  code:  0117.
■650  4▼aQuantum  physics.
■650  4▼aThermodynamics.
■650  4▼aPhysics.
■653    ▼aEntanglement
■653    ▼aOpen  quantum  systems
■653    ▼aQuantum  heat  engines
■653    ▼aQuantum  thermodynamics
■690    ▼a0599
■690    ▼a0348
■690    ▼a0605
■71020▼aUniversity  of  Maryland,  College  Park▼bChemical  Physics.
■7730  ▼tDissertations  Abstracts  International▼g84-12B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0117
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931266▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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