Chiral-Induced Spin Selectivity Regulates Triplet formation in Heliobacterial Photosynthesis

• URL: http://arxiv.org/abs/2605.08307v1
• Date: Fri, 08 May 2026 13:15:27 GMT
• Title: Chiral-Induced Spin Selectivity Regulates Triplet formation in Heliobacterial Photosynthesis
• Abstract summary: Triplet formation in organic systems can promote photochemical damage and reduce the efficiency of charge separation processes.<n>We present a theoretical investigation of the intrinsic quantum spin dynamics governing triplet formation in the heliobacterial reaction center.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Triplet formation and its regulation have always been of central interest in understanding the photophysical behavior of living systems. In organic systems, excessive triplet formation poses significant challenges, as it can promote photochemical damage and reduce the efficiency of charge separation processes, making its regulation critically important.Here, we present a theoretical investigation of the intrinsic quantum spin dynamics governing triplet formation in the heliobacterial reaction center, a system that operates without any internal magnetic field. Using an open quantum systems approach based on the Lindblad formalism, we simulate the spin-correlated radical pair dynamics occurring during charge separation in the heliobacterial reaction center. The study systematically examines how triplet formation is regulated by variations in two key parameters, hyperfine coupling strengths and recombination rates, and how this regulation is further influenced by the inclusion of chirality-induced spin selectivity (CISS) in conjunction with the radical pair mechanism (RPM). Our results demonstrate that the CISS effect significantly suppresses triplet formation across the parameter space relevant to the heliobacterial molecular environment, revealing an intrinsic quantum protective mechanism operating through spin control in heliobacterial photosynthesis.

Related papers

• Fault-tolerant quantum simulation of the Pauli-Breit Hamiltonian for ab initio hybrid quantum-classical molecular design with applications to photodynamic therapy [0.0]
  Relativistic spin effects drive subtle molecular phenomena ranging from intersystem crossing in photodynamic therapy to spin-mediated catalysts and high-resolution spectroscopy.<n>These effects are described by the Pauli-Breit Hamiltonian, which extends the nonrelativistic electronic Hamiltonian by including one- and two-electron spin-orbit and spin-spin interactions.<n>We propose a fault-tolerant quantum algorithm for computing molecular energy levels and properties governed by the Pauli-Breit Hamiltonian.
  arXiv  Detail & Related papers  (2026-01-26T19:11:01Z)
• Nonclassical Driven-Dissipative Dynamics in Collective Quantum Optics [51.56484100374058]
  We study ensembles of interacting quantum emitters coherently driven by a laser field and coupled to photonic structures.<n>We find that off-resonant virtual states may gain population through dissipation, redefining their role in open systems.<n>Our models address challenges like inhomogeneous broadening and decoherence, demonstrating the feasibility of harnessing cooperative light-matter effects for quantum technologies.
  arXiv  Detail & Related papers  (2025-09-12T20:01:55Z)
• A Unified Semiclassical Framework for Ultrafast Competitive Electron Transfer in Multiredox Molecular Systems [0.0]
  We present a unified semiclassical framework for modeling ultrafast, competitive ET in multiredox compounds.<n>The proposed framework offers a general and scalable tool for the rational design of photofunctional molecular systems.
  arXiv  Detail & Related papers  (2025-07-26T17:49:55Z)
• Chirality-bolstered quantum Zeno effect enhances radical pair-based magnetoreception [0.0]
  We systematically investigate the impact of CISS on the directional magnetic sensitivity of radical pair reactions.<n>We find that CISS-induced spin polarization significantly enhances magnetic sensitivity by introducing triplet character into the initial state.<n>We provide a unified cryptochrome scheme for modeling CISS-influenced initial states and recombination dynamics.
  arXiv  Detail & Related papers  (2025-05-02T18:08:04Z)
• Enhancement of Opto-Electro-Mechanical Entanglement through Three-Level Atoms [0.0]
  We address the dynamical bipartite entanglement in an opto-electro-mechanical system that involves a three-level atom. The research findings indicate that the entanglement between each subsystem increases with the atom injection rate.
  arXiv  Detail & Related papers  (2024-06-24T14:42:40Z)
• Multi-level Purcell effect and the impact of vibrational modes in molecular quantum optics [62.997667081978825]
  We study a manifestation of the Purcell effect in a bio-inspired photosynthetic dimer. We provide a theoretical picture in terms of an effective non-Hermitian Hamiltonian.
  arXiv  Detail & Related papers  (2023-06-15T18:27:40Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Chiral Induced Spin Selectivity as a Spontaneous Intertwined Order [2.808255698770643]
  Chiral induced spin selectivity (CISS) describes efficient spin filtering by chiral molecules. Here we report a multi-orbital theory for CISS, where an effective spin-orbit interaction (SOI) emerges from spontaneous formation of electron-hole pairing. Our theory may provide important guidance for searching other molecules with CISS effects.
  arXiv  Detail & Related papers  (2020-05-07T17:59:59Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.