Signatures of coherent energy transfer and exciton delocalization in time-resolved optical cross correlations

• URL: http://arxiv.org/abs/2512.17741v1
• Date: Fri, 19 Dec 2025 16:19:25 GMT
• Title: Signatures of coherent energy transfer and exciton delocalization in time-resolved optical cross correlations
• Authors: Hallmann Óskar Gestsson, Alexandra Olaya-Castro,
• Abstract summary: We investigate how optical second-order cross correlations witness the quantum features of a prototype donor-acceptor light-harvesting unit.<n>Our work strengthens the idea that measurements of the intensity quantum cross correlations can provide distinctive signatures of the quantum behavior of biophysical emitters.
• Score: 45.88028371034407
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate how optical second-order cross correlations witness the quantum features of a prototype donor-acceptor light-harvesting unit. By considering a pair of detuned two-level emitters electronically coupled and incoherently driven to a non-equilibrium steady-state, we gain insight into how electronic quantum properties such as exciton eigenstate delocalization, coherent energy transfer and steady-state electronic coherence, are manifested in the joint probability of emission or optical second-order cross correlation. Specifically, we show that the frequency associated with oscillations present in time-resolved second-order cross correlation functions quantifies not only the time scale of coherent energy transfer but also the degree of delocalization of the exciton eigenstates. Furthermore, we show that time-resolved cross correlations directly witness steady-state electronic coherence. Our work strengthens the idea that measurements of the intensity quantum cross correlations can provide distinctive signatures of the quantum behavior of biophysical emitters.

Related papers

• Quantum correlations curvature, memory functions, and fundamental bounds [51.85131234265026]
  We show that quantum geometry can qualitatively modify the imaginary-time decay of correlations, leading to nontrivial curvature behavior.<n>More generally, we show a universal bound on correlation curvature that holds for interacting systems in thermal equilibrium.
  arXiv  Detail & Related papers  (2025-12-22T01:33:11Z)
• Quantum Correlation and Synchronisation-Enhanced Energy Transfer in Driven-Dissipative Light-Harvesting Dimers [12.264991060221845]
  Quantum synchronisation has been proposed as a mechanism for electronic energy transfer in light-harvesting complexes.<n>We revisit this process in cryptophyte photosynthetic antennae using the exciton-vibrational dimer model.
  arXiv  Detail & Related papers  (2025-12-14T12:16:09Z)
• Two-colour photon correlations probe coherent vibronic contributions to electronic excitation transport under incoherent illumination [41.94295877935867]
  We consider a prototype light-harvesting heterodimer exhibiting coherent and collective exciton-vibration interactions. We show that coherent vibronic mechanisms strongly affect the asymmetries characteristic of time-resolved photon cross-correlations. We discuss how such second-order correlation asymmetry establishes important connections between coherent vibronic interactions, directional exciton population transport, and violation of quantum detailed balance.
  arXiv  Detail & Related papers  (2024-02-29T19:00:05Z)
• Effects of critical correlations on quantum percolation in two dimensions [0.0]
  We consider a two-dimensional tight-binding model that interacts with a background of classical spins in thermal equilibrium. To capture the salient features of the classical transition, we focus on the strong coupling limit. We provide evidence that the classical phase transition might induce a delocalization-localization transition in the quantum system at certain energies.
  arXiv  Detail & Related papers  (2022-03-28T18:00:01Z)
• Frequency combs with parity-protected cross-correlations from dynamically modulated qubit arrays [117.44028458220427]
  We develop a general theoretical framework to dynamically engineer quantum correlations in the frequency-comb emission from an array of superconducting qubits in a waveguide. We demonstrate, that when the resonance of the two qubits are periodically modulated with a $pi$ phase shift, it is possible to realize simultaneous bunching and antibunching in cross-correlations of the scattered photons from different sidebands.
  arXiv  Detail & Related papers  (2022-03-01T13:12:45Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Coherence of resonant light-matter interaction in the strong-coupling limit [0.0]
  We derive analytical expressions for the spectrum and the intensity correlation function for photons scattered by the two-state atom coupled to the coherently driven cavity mode. We increase the driving field amplitude and approach the critical point organizing a second-order dissipative quantum phase transition.
  arXiv  Detail & Related papers  (2021-05-27T13:17:28Z)
• Enhancing nonclassical bosonic correlations in a Quantum Walk network through experimental control of disorder [50.591267188664666]
  We experimentally realize a controllable inhomogenous Quantum Walk dynamics. We observe two photon states which exhibit an enhancement in the quantum correlations between two modes of the network.
  arXiv  Detail & Related papers  (2021-02-09T10:57:00Z)
• Synchronisation phase as an indicator of persistent quantum correlations between subsystems [68.8204255655161]
  Spontaneous synchronisation is a collective phenomenon that can occur in both dynamical classical and quantum systems. We show that our analysis applies to a variety of spontaneously synchronising open quantum systems.
  arXiv  Detail & Related papers  (2020-06-29T17:21:32Z)
• Detecting out-of-time-order correlations via quasi-adiabatic echoes as a tool to reveal quantum coherence in equilibrium quantum phase transitions [0.0]
  We show that an abrupt change in coherence and entanglement of the ground state is observable in the spectrum of multiple quantum coherence intensities. Our scheme allows for the detection of OTOCs without time-reversal of coherent dynamics.
  arXiv  Detail & Related papers  (2020-06-01T23:28:44Z)
• Quantum Statistical Complexity Measure as a Signalling of Correlation Transitions [55.41644538483948]
  We introduce a quantum version for the statistical complexity measure, in the context of quantum information theory, and use it as a signalling function of quantum order-disorder transitions. We apply our measure to two exactly solvable Hamiltonian models, namely: the $1D$-Quantum Ising Model and the Heisenberg XXZ spin-$1/2$ chain. We also compute this measure for one-qubit and two-qubit reduced states for the considered models, and analyse its behaviour across its quantum phase transitions for finite system sizes as well as in the thermodynamic limit by using Bethe ansatz.
  arXiv  Detail & Related papers  (2020-02-05T00:45:21Z)

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.