Temporally localized quantum operations on continuous-wave thermal light

• URL: http://arxiv.org/abs/2412.17223v2
• Date: Tue, 02 Sep 2025 00:41:43 GMT
• Title: Temporally localized quantum operations on continuous-wave thermal light
• Authors: Yunkai Wang, Yujie Zhang, Virginia O. Lorenz,
• Abstract summary: We find that in the weak-source limit and under the assumption of a flat spectrum, the first non-vacuum term in the state expansion does form a mixture of such pulses.<n>This decomposition is essential for quantum-enhanced astronomical interferometry.
• Score: 23.352214773681606
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Previous work showed that thermal light with a blackbody spectrum cannot be decomposed into a mixture of independent localized pulses. However, we find that in the weak-source limit and under the assumption of a flat spectrum, the first non-vacuum term in the state expansion does form a mixture of such pulses. This decomposition is essential for quantum-enhanced astronomical interferometry, which typically operates on localized pulses even though stellar light is inherently continuous-wave. We present a quantum derivation of the van Cittert-Zernike theorem that incorporates finite bandwidth, thereby justifying the operations on localized pulses while processing continuous-wave thermal light. For general spectra in the weak-source limit, we establish a criterion under which correlations between pulses can be safely neglected. When this criterion is not met, we provide a corrected strategy that accurately accounts for both the spectral profile and the detector-defined pulse shape.

Related papers

• Geometric phase of exceptional point as quantum resonance in complex scaling method [0.0]
  We analyze the self-orthogonality in the vicinity of an EP, the Berry phase, and the Chern characteristic.<n>Our results provide a bridge between non-Hermitian spectral theory and the traditional theory of quantum resonances.
  arXiv  Detail & Related papers  (2025-12-31T00:23:18Z)
• Quantum Nonlinear Response of Emitter Lattices [42.17343824099138]
  We study the emergence of quantum nonlinearities in the optical response of lattices of two-level quantum emitters coherently driven by a laser.<n>For subwavelength lattice periods, where the system behaves as a quantum metasurface, we find that a resonant incident plane wave can populate excitonic Bloch states.<n>Closely related to resonance fluorescence, the far-field emission from the system in the strong-driving regime is dominated by a broadband background of photons.
  arXiv  Detail & Related papers  (2025-10-22T19:43:54Z)
• Asymmetric two-photon response of an incoherently driven quantum emitter [0.0]
  Quantum emitters promise to emit exactly one photon with high probability when pumped by a laser pulse.<n>Re-excitation during a laser pulse causes the consecutive emission of two photons, thus limiting the single-photon purity.<n>Here, we demonstrate qualitative differences in the process arising from phonon-assisted excitation.
  arXiv  Detail & Related papers  (2025-07-09T17:44:41Z)
• Extracting RABBITT-like phase information from time-dependent transient absorption spectra [0.0]
  We explore how the spectral phase of atto-second pulse trains influences the optical cross section in transient absorption (TA) spectroscopy. The interaction of extreme ultraviolet (XUV) and time-delayed near-infrared (NIR) fields governs the dynamics.
  arXiv  Detail & Related papers  (2025-03-01T12:48:02Z)
• Pulse characterization at the single-photon level through chronocyclic $Q$-function measurements [2.193021519015704]
  We demonstrate the retrieval of the complex spectral amplitude of single-photon-level light pulses through measuring their chronocyclic $Q-$function. Our approach draws inspiration from quantum state tomography by exploiting the analogy between quadrature phase space and time-frequency phase space.
  arXiv  Detail & Related papers  (2024-08-22T11:30:49Z)
• Single-photon phase spectrum recovery from the Hong-Ou-Mandel dip [5.671664967946011]
  We present a method to reconstruct the phase spectrum difference between two wave packets from their Hong-Ou-Mandel dip, and intensity spectra. This method is generalizable to the measurement of unknown single-photon wave packets with the aid of a reference wave packet.
  arXiv  Detail & Related papers  (2024-05-16T04:41:56Z)
• On the role of chirping in pulsed single photon spectroscopy [0.0]
  We investigate the precision of estimating the interaction strength between a two-level system and a single-photon pulse when the latter is subject to chirping. We show that experimentally feasible measurements are optimal, or close to it, for chirped, pulsed single photon spectroscopy.
  arXiv  Detail & Related papers  (2024-05-04T17:46:11Z)
• 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)
• Quantum control of ro-vibrational dynamics and application to light-induced molecular chirality [39.58317527488534]
  Achiral molecules can be made temporarily chiral by excitation with electric fields. We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
  arXiv  Detail & Related papers  (2023-10-17T20:33:25Z)
• A Quantum Theory of Temporally Mismatched Homodyne Measurements with Applications to Optical Frequency Comb Metrology [39.58317527488534]
  We derive measurement operators for homodyne detection with arbitrary mode overlap. These operators establish a foundation to extend frequency-comb interferometry to a wide range of scenarios.
  arXiv  Detail & Related papers  (2023-10-05T22:49:50Z)
• Spatial quasiperiodic driving of a dissipative optical lattice and origin of directed Brillouin modes in a randomly diffusing cold atom cloud [34.82692226532414]
  Atoms confined in a three-dimensional dissipative optical lattice oscillate inside potential wells, hopping to adjacent wells, thereby diffusing in all directions. Illumination by a weak probe beam modulates the lattice, yielding propagating atomic density waves, referred to as Brillouin modes which travel perpendicular to the direction of travel of the probe. A systematic measurement of the transmitted probe spectra as a function of off-axis probe angle is presented, which is consistent with the velocity- and frequency-matching predictions from the detailed model.
  arXiv  Detail & Related papers  (2023-09-06T19:10:21Z)
• Two-photon pulse scattering spectroscopy for arrays of two-level atoms, coupled to the waveguide [125.99533416395765]
  We have theoretically studied the scattering of two-photon pulses from a spatially-separated array of two-level atoms coupled to a waveguide. The contributions of various single-eigenstate and double-excited eigenstates of the array have been analyzed.
  arXiv  Detail & Related papers  (2023-02-27T22:05:07Z)
• Signatures of fractional statistics in nonlinear pump-probe spectroscopy [0.0]
  We show that the presence of anyons in the excitation spectrum of a two-dimensional system can be inferred from nonlinear spectroscopic quantities. In magnetic systems, the signal of interest can be measured using currently available terahertz-domain probes.
  arXiv  Detail & Related papers  (2022-10-28T16:28:35Z)
• Tuning Spectral Properties of Individual and Multiple Quantum Emitters in Noisy Environments [0.0]
  A quantum emitter in a dynamic environment may have its energy levels drift uncontrollably in time with the fluctuating bath. This can result in an emission/absorption spectrum that is spread over a broad range of frequencies. We consider a quantum emitter in an environment that alters the energy levels so that the emission frequency is represented by a Gaussian random distribution.
  arXiv  Detail & Related papers  (2022-07-06T16:01:59Z)
• Unsupervised Spectral Unmixing For Telluric Correction Using A Neural Network Autoencoder [58.720142291102135]
  We present a neural network autoencoder approach for extracting a telluric transmission spectrum from a large set of high-precision observed solar spectra from the HARPS-N radial velocity spectrograph.
  arXiv  Detail & Related papers  (2021-11-17T12:54:48Z)
• Simulation of absorption spectra of molecular aggregates: a Hierarchy of Stochastic Pure States approach [68.8204255655161]
  hierarchy of pure states (HOPS) provides a formally exact solution based on local, trajectories. Exploiting the localization of HOPS for the simulation of absorption spectra in large aggregares requires a formulation in terms of normalized trajectories.
  arXiv  Detail & Related papers  (2021-11-01T16:59:54Z)
• Continuum-electron interferometry for enhancement of photoelectron circular dichroism and measurement of bound, free, and mixed contributions to chiral response [39.58317527488534]
  We develop photoelectron interferometry based on laser-assisted extreme ultraviolet ionization for flexible and robust control of photoelectron circular dichroism in randomly oriented chiral molecules. A comb of XUV photons ionizes a sample of chiral molecules in the presence of a time-delayed infrared or visible laser pulse promoting interferences between components of the XUV-ionized photoelectron wave packet.
  arXiv  Detail & Related papers  (2021-04-15T15:20:57Z)
• Homonuclear J-Coupling Spectroscopy at Low Magnetic Fields using Spin-Lock Induced Crossing [0.03705745122469343]
  We demonstrate that spectra can be acquired at low field using a novel pulse sequence called spin-lock induced crossing (SLIC) This probes energy level crossings induced by a weak spin-locking pulse and produces a unique J-coupling spectrum for most organic molecules. We performed SLIC spectroscopy on a number of small molecules at 276 kHz and 20.8 MHZ, and we show that SLIC spectra can be simulated in good agreement with measurements.
  arXiv  Detail & Related papers  (2021-03-01T20:17:24Z)
• Two-Dimensional Single- and Multiple-Quantum Correlation Spectroscopy in Zero-Field Nuclear Magnetic Resonance [55.41644538483948]
  We present single- and multiple-quantum correlation $J$-spectroscopy detected in zero magnetic field using a Rb vapor-cell magnetometer. At zero field the spectrum of ethanol appears as a mixture of carbon isotopomers, and correlation spectroscopy is useful in separating the two composite spectra.
  arXiv  Detail & Related papers  (2020-04-09T10:02:45Z)
• Spectral Compression of Narrowband Single Photons with a Resonant Cavity [62.997667081978825]
  We experimentally demonstrate a spectral compression scheme for heralded single photons with narrow spectral bandwidth around 795 nm. We observe a compression from 20.6 MHz to less than 8 MHz, almost matching the corresponding atomic transition.
  arXiv  Detail & Related papers  (2020-01-02T13:08:59Z)

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.