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Topological and Cycle Flux Analysis of Non-Equilibrium Particle Transportation
Topological and Cycle Flux Analysis of Non-Equilibrium Particle Transportation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103823
- ISBN
- 9798291558218
- DDC
- 541
- 저자명
- Slowey, Chase N.
- 서명/저자
- Topological and Cycle Flux Analysis of Non-Equilibrium Particle Transportation
- 발행사항
- [Sl] : The University of North Carolina at Chapel Hill, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 113 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Lu, Zhiyue.
- 학위논문주기
- Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
- 초록/해제
- 요약Passive transport through narrow channels often defies equilibrium-based intuition: how can a simple, energetically flat "tube" spontaneously push one species against its concentration gradient, or entirely exclude one species while allowing another-without any active gating or ATP? In this dissertation, we address that question by combining nonequilibrium stochastic-thermodynamic methods, graph-theoretic cycle-flux analysis, and eigenvalue-braid topology to reveal a purely entropic mechanism for ratchet-like and infinitely selective transportation.We begin by formulating a minimal two-species exclusion-process model on a one-dimensional lattice ("particle tube"), in which each site may be occupied by at most one 'A' or 'B' type particle. Without any binding energies or energetic biases, this "inert" tube nevertheless exhibits distinct transport regimes-"dud" modes (both species flow down their concentration gradients), "ratchet" mode (A flows down its concentration gradient while B flows up or vice versa), and lines of infinite selectivity (A flows through the tube, while B's net current vanishes). By mapping the ([A]L, [B]L, [A]R, & [B]R) parameter space for various tube lengths, we show that ratchet regions grow and "sloppy-gear" efficiency increases with tube length, confirming that stochastic interlocking of many particles can force one particle type up its concentration gradient by having the other particle type flow down its concentration gradient.To test whether these phenomena correspond to a true dynamical phase transition, we apply the large-deviation principle. We construct tilted probability transition rate matrices for 'A' and 'B' type particle currents (individually and jointly) and compute their scaled cumulant generating functions and rate functions. In all regimes: dud, ratchet, transition boundaries, and infinite-selectivity lines-both the scaled cumulant generating functions and rate functions remain analytic and unimodal, precluding a first-order dynamical phase transition.We then employ eigenvalue-braid analysis on similarly tilted probability transition rate matrices to detect subtle eigenspectrum rearrangements. Several braid crossings appear; some coincide with ratchet mode or infinite-selectivity boundaries-indicating that spectral topology does drive macroscopic mode changes-while others do not correspond directly to any observed transport regime.Finally, we use the generalized matrix-tree theorem to decompose steady-state fluxes into one-way cycle currents. Enumerating all fundamental cycles and assigning each a 'topological tuple' (A,B), we identify which cycles dominate in each regime. At the ratchet boundary, joint (1,1) cycles overtake pure (1,0) and (0,-1) cycles, generating a net counter-gradient 'B' type particle flow. Similarly, infinite selectivity occurs when all 'B'-carrying cycles cancel while 'A'-only cycles remain positive. This cycle analysis also explains the 'mystery' braids observed in the topological analysis. A one-site toy model further confirms that these ratchet and infinite-selectivity mechanisms require multiple sites and cycles.Together, these results demonstrate that passive channels can achieve Maxwell-Demon-like ratchet and infinitely selective transport solely through entropic cycle-flux coupling. This unified framework-combining large deviation principle to rule out phase transitions, eigenvalue braiding to probe spectral features, and cycle-flux decomposition to pinpoint the underlying graph-theoretic origin-provides new understanding in the transportation of particles through narrow media.
- 일반주제명
- Physical chemistry
- 일반주제명
- Chemistry
- 일반주제명
- Statistical physics
- 일반주제명
- Theoretical physics
- 키워드
- Non-equilibrium
- 키워드
- Cycle flux
- 기타저자
- The University of North Carolina at Chapel Hill Chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798291558218
■035 ▼a(MiAaPQ)AAI32042379
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a541
■1001 ▼aSlowey, Chase N.
■24510▼aTopological and Cycle Flux Analysis of Non-Equilibrium Particle Transportation
■260 ▼a[Sl]▼bThe University of North Carolina at Chapel Hill▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a113 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Lu, Zhiyue.
■5021 ▼aThesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
■520 ▼aPassive transport through narrow channels often defies equilibrium-based intuition: how can a simple, energetically flat "tube" spontaneously push one species against its concentration gradient, or entirely exclude one species while allowing another-without any active gating or ATP? In this dissertation, we address that question by combining nonequilibrium stochastic-thermodynamic methods, graph-theoretic cycle-flux analysis, and eigenvalue-braid topology to reveal a purely entropic mechanism for ratchet-like and infinitely selective transportation.We begin by formulating a minimal two-species exclusion-process model on a one-dimensional lattice ("particle tube"), in which each site may be occupied by at most one 'A' or 'B' type particle. Without any binding energies or energetic biases, this "inert" tube nevertheless exhibits distinct transport regimes-"dud" modes (both species flow down their concentration gradients), "ratchet" mode (A flows down its concentration gradient while B flows up or vice versa), and lines of infinite selectivity (A flows through the tube, while B's net current vanishes). By mapping the ([A]L, [B]L, [A]R, & [B]R) parameter space for various tube lengths, we show that ratchet regions grow and "sloppy-gear" efficiency increases with tube length, confirming that stochastic interlocking of many particles can force one particle type up its concentration gradient by having the other particle type flow down its concentration gradient.To test whether these phenomena correspond to a true dynamical phase transition, we apply the large-deviation principle. We construct tilted probability transition rate matrices for 'A' and 'B' type particle currents (individually and jointly) and compute their scaled cumulant generating functions and rate functions. In all regimes: dud, ratchet, transition boundaries, and infinite-selectivity lines-both the scaled cumulant generating functions and rate functions remain analytic and unimodal, precluding a first-order dynamical phase transition.We then employ eigenvalue-braid analysis on similarly tilted probability transition rate matrices to detect subtle eigenspectrum rearrangements. Several braid crossings appear; some coincide with ratchet mode or infinite-selectivity boundaries-indicating that spectral topology does drive macroscopic mode changes-while others do not correspond directly to any observed transport regime.Finally, we use the generalized matrix-tree theorem to decompose steady-state fluxes into one-way cycle currents. Enumerating all fundamental cycles and assigning each a 'topological tuple' (A,B), we identify which cycles dominate in each regime. At the ratchet boundary, joint (1,1) cycles overtake pure (1,0) and (0,-1) cycles, generating a net counter-gradient 'B' type particle flow. Similarly, infinite selectivity occurs when all 'B'-carrying cycles cancel while 'A'-only cycles remain positive. This cycle analysis also explains the 'mystery' braids observed in the topological analysis. A one-site toy model further confirms that these ratchet and infinite-selectivity mechanisms require multiple sites and cycles.Together, these results demonstrate that passive channels can achieve Maxwell-Demon-like ratchet and infinitely selective transport solely through entropic cycle-flux coupling. This unified framework-combining large deviation principle to rule out phase transitions, eigenvalue braiding to probe spectral features, and cycle-flux decomposition to pinpoint the underlying graph-theoretic origin-provides new understanding in the transportation of particles through narrow media.
■590 ▼aSchool code: 0153.
■650 4▼aPhysical chemistry
■650 4▼aChemistry
■650 4▼aStatistical physics
■650 4▼aTheoretical physics
■653 ▼aParticle transportation
■653 ▼aNon-equilibrium
■653 ▼aCycle flux
■653 ▼aInfinite selectivity
■653 ▼aStochastic-thermodynamic methods
■690 ▼a0494
■690 ▼a0753
■690 ▼a0217
■690 ▼a0485
■71020▼aThe University of North Carolina at Chapel Hill▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0153
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358265▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


