Measuring spectral functions of doped magnets with Rydberg tweezer arrays

• URL: http://arxiv.org/abs/2602.17600v1
• Date: Thu, 19 Feb 2026 18:24:43 GMT
• Title: Measuring spectral functions of doped magnets with Rydberg tweezer arrays
• Authors: Romain Martin, Mu Qiao, Ivan Morera, Lukas Homeier, Bastien Gély, Lukas Klein, Yuki Torii Chew, Daniel Barredo, Thierry Lahaye, Eugene Demler, Antoine Browaeys,
• Abstract summary: We introduce a spectroscopic protocol for single-charge injection with simultaneous spatial and energy resolution in a Rydberg tweezer array.<n>We go beyond conventional spectroscopy by not only measuring the single-particle spectral function but also directly imaging the microscopic structure of the excitations underlying spectral resonances in frustrated $tJ$ Hamiltonians.
• Score: 1.904372811047945
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Spectroscopic measurements of single-particle spectral functions provide crucial insight into strongly correlated quantum matter by resolving the energy and spatial structure of elementary excitations. Here we introduce a spectroscopic protocol for single-charge injection with simultaneous spatial and energy resolution in a Rydberg tweezer array, effectively emulating scanning tunneling microscopy. By combining this protocol with single-atom-resolved imaging, we go beyond conventional spectroscopy by not only measuring the single-particle spectral function but also directly imaging the microscopic structure of the excitations underlying spectral resonances in frustrated $tJ$ Hamiltonians. We reveal resonances associated with the formation of bound magnetic polarons -- composite quasiparticles consisting of a mobile hole bound to a magnon -- and directly extract their binding energy, spatial extent, and spin character. Finally, by exploiting the spatial tunability of our platform, we measure the local density of states across different lattice geometries. Our work establishes Rydberg tweezer arrays as a powerful platform for spectroscopic studies of strongly correlated models, offering microscopic control and direct real-space access to emergent quasiparticles in engineered quantum matter.

Related papers

• Spectroscopic readout of chiral photonic topology in a single-cavity spin-orbit-coupled Bose-Einstein condensate [0.0]
  We present a framework for spectroscopic readout of chiral photonic topology in a single driven optical cavity.<n>In the loss-dominated regime, where cavity decay exceeds atomic dissipation, the power spectral density exhibits Dirac-like gapped hybrid modes.<n>The complex spectrum reveals parity-time symmetric coalescences and gain-loss bifurcations, marking exceptional points.
  arXiv  Detail & Related papers  (2025-12-09T14:50:13Z)
• A single optically detectable tumbling spin in silicon [0.0]
  We demonstrate single spin spectroscopy of a fluorescent tumbling defect in silicon called the G center.<n>We reveal a fine magnetic structure resulting from the spin principal axes jumping between discrete orientations in the crystal.<n>By modeling the atomic reorientation of the defect, we demonstrate that spin tumbling induces variations in the coupling to the microwave magnetic field.
  arXiv  Detail & Related papers  (2025-10-17T12:38:25Z)
• Photon-mediated interactions and dynamics of coherently driven quantum emitters in complex photonic environments [41.94295877935867]
  Born-Markov master equations have been extensively employed in the description of quantum optical phenomena.<n>We benchmark this modeling approach for the quantum dynamics of the emitter pair against exact calculations based on a macroscopic field quantization formalism.<n>Our analysis reveals four distinct regimes of laser driving and frequency splitting that lead to markedly different levels of accuracy in the effective model.
  arXiv  Detail & Related papers  (2025-08-01T09:38:07Z)
• Broadband biphoton source for quantum optical coherence tomography based on a Michelson interferometer [39.58317527488534]
  We describe and experimentally demonstrate a novel technique for generation of a bright collinear biphoton field with a broad spectrum.<n>As the most straightforward application of the source, we employ Michelson interferometer-based quantum optical coherence tomography (Q OCT)
  arXiv  Detail & Related papers  (2024-01-31T13:52:37Z)
• Confined Meson Excitations in Rydberg-Atom Arrays Coupled to a Cavity Field [0.0]
  Confinement is a pivotal phenomenon in numerous models of high-energy and statistical physics. In this study, we investigate the emergence of confined meson excitations within a one-dimensional system, comprising Rydberg-dressed atoms trapped and coupled to a cavity field. We suggest a method for the photonic characterization of these confined excitations, utilizing homodyne detection and single-site imaging techniques to observe the localized particles.
  arXiv  Detail & Related papers  (2023-12-28T22:18:27Z)
• Probing Electromagnetic Nonreciprocity with Quantum Geometry of Photonic States [0.0]
  We propose a contact-less detection using a cross-cavity device where a material of interest is placed at its centre. We show that the optical properties of the material, such as Kerr and Faraday rotation, manifest in the coupling between the cavities' electromagnetic modes and in the shift of their resonant frequencies. Our approach is expected to be applicable across a broad spectrum of experimental platforms including Fock states in optical cavities, or, coherent states in microwave and THz resonators.
  arXiv  Detail & Related papers  (2023-10-24T20:37:09Z)
• Engineering the impact of phonon dephasing on the coherence of a WSe$_{2}$ single-photon source via cavity quantum electrodynamics [36.88715167286119]
  Emitter dephasing is one of the key issues in the performance of solid-state single photon sources. We show that it is possible to tune and engineer the coherence of photons emitted from a single WSe$$ monolayer dot via selectively coupling it to a spectral cavity resonance.
  arXiv  Detail & Related papers  (2023-07-13T16:41:06Z)
• Calculating non-linear response functions for multi-dimensional electronic spectroscopy using dyadic non-Markovian quantum state diffusion [68.8204255655161]
  We present a methodology for simulating multi-dimensional electronic spectra of molecular aggregates with coupling electronic excitation to a structured environment. A crucial aspect of our approach is that we propagate the NMQSD equation in a doubled system Hilbert space but with the same noise.
  arXiv  Detail & Related papers  (2022-07-06T15:30:38Z)
• Heralded spectroscopy reveals exciton-exciton correlations in single colloidal quantum dots [0.8911822441893501]
  We introduce biexciton heralded spectroscopy, enabled by a single-photon avalanche diode array based spectrometer. This allows us to directly observe biexciton-exciton emission cascades and measure the biexciton binding energy of single quantum dots at room temperature. We uncover correlations hitherto masked in ensembles, of the biexciton binding energy with both charge-carrier confinement and fluctuations of the local electrostatic potential.
  arXiv  Detail & Related papers  (2021-08-01T00:41:57Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Position-controlled quantum emitters with reproducible emission wavelength in hexagonal boron nitride [45.39825093917047]
  Single photon emitters (SPEs) in low-dimensional layered materials have recently gained a large interest owing to the auspicious perspectives of integration and extreme miniaturization. Here, we evidence SPEs in high purity synthetic hexagonal boron nitride (hBN) that can be activated by an electron beam at chosen locations. Our findings constitute an essential step towards the realization of top-down integrated devices based on identical quantum emitters in 2D materials.
  arXiv  Detail & Related papers  (2020-11-24T17:20:19Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)

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.