Energy-time entanglement and intermediate state dynamics in two photon absorption

• URL: http://arxiv.org/abs/2105.04121v2
• Date: Thu, 8 Jul 2021 05:20:21 GMT
• Title: Energy-time entanglement and intermediate state dynamics in two photon absorption
• Authors: Baihong Li and Holger F. Hofmann
• Abstract summary: Energy-time entanglement can enhance two photon absorption (TPA) by simultaneously optimizing the two photon resonance and the coincidence rate of photons at the absorber. We show that the theory can be simplified greatly by separating the two photon resonance from the temporal dynamics of the intermediate levels.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: It is well known that energy-time entanglement can enhance two photon absorption (TPA) by simultaneously optimizing the two photon resonance and the coincidence rate of photons at the absorber. However, the precise relation between entanglement and the TPA rate depends on the coherences of intermediate states involved in the transition, making it a rather challenging task to identify universal features of TPA processes. In the present paper, we show that the theory can be simplified greatly by separating the two photon resonance from the temporal dynamics of the intermediate levels. The result is a description of the role of entanglement in the TPA process by a one-dimensional coherence in the Hilbert space defined by the arrival time difference of the two photons. Transformation into the frequency difference basis results in Kramers-Kronig relations for the TPA process, separating off-resonant contributions of virtual levels from resonant contributions. In particular, it can be shown that off-resonant contributions are insensitive to the frequencies of the associated virtual states, indicating that virtual-state spectroscopy of levels above the final two photon excited state is not possible.

Related papers

• Role of time-frequency correlations in two-photon-two-atom resonance energy transfer [0.0]
  We study the excitation of two non-interacting two-level atoms by time-frequency correlated photon pairs. Our results help elucidating the role of time-frequency correlations in resonance energy transfer with SPDC photons.
  arXiv  Detail & Related papers  (2024-08-07T17:00:23Z)
• 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)
• Enhancement of broadband entangled two-photon absorption by resonant spectral phase flips [0.0]
  We consider the effects of a phase flip in the single photon spectrum. We find that a resonant phase flip maximizes the contributions of the asymmetric imaginary part of the dispersion. Our results indicate that broadband entangled TPA with spectral phase flips may be suitable for phase-sensitive spectroscopy at the lower end of the spectrum.
  arXiv  Detail & Related papers  (2023-02-06T15:10:39Z)
• Aspects of Two-photon Absorption of Squeezed Light: the CW limit [0.0]
  We find an enhancement of the two-photon absorption due to resonant contributions from the large squeezed light bandwidth. One-photon absorption is the dominant process in the region of parameter space where a large enhancement of the two-photon absorption is possible.
  arXiv  Detail & Related papers  (2022-05-16T07:34:03Z)
• 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)
• Quantifying the enhancement of two-photon absorption due to spectral-temporal entanglement [0.0]
  When a low flux of time-frequency-entangled photon pairs illuminates a two-photon transition, the rate of two-photon absorption (TPA) can be enhanced considerably. We present a quantum-theoretic of entangled TPA (ETPA) and calculate an upper bound on the amount of quantum enhancement that is possible in such systems.
  arXiv  Detail & Related papers  (2021-03-18T21:17:22Z)
• Lifetime-resolved Photon-Correlation Fourier Spectroscopy [0.0]
  Simultaneous measurement of the associated spectral dynamics requires a technique with a high spectral and temporal resolution. We propose a pulsed excitation-laser analog of Photon-Correlation Fourier Spectroscopy (PCFS), which extracts the lineshape and spectral diffusion dynamics along the emission lifetime trajectory of the emitter.
  arXiv  Detail & Related papers  (2021-02-07T03:24:53Z)
• Light-matter interactions near photonic Weyl points [68.8204255655161]
  Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerated at a single momentum point, labeled as Weyl point. We analyze the dynamics of a single quantum emitter coupled to a Weyl photonic bath as a function of its detuning with respect to the Weyl point.
  arXiv  Detail & Related papers  (2020-12-23T18:51:13Z)
• 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)
• Observing coherences with time-resolved photoemission [77.34726150561087]
  We discuss the potential creation and measurement of coherences in both dispersive solids and qubit-like single levels using current generation time- and angle-resolved photoemission technology. We show that in both cases, when both the pump and the probe overlap energetically with the coherent levels, that the time-resolved photoemission signal shows a beating pattern at the energy difference between the levels. In the case of dispersive bands, this leads to momentum-dependent oscillations, which may be used to map out small energy scales in the band structure.
  arXiv  Detail & Related papers  (2020-05-18T18:00:02Z)
• Entanglement dynamics in dissipative photonic Mott insulators [62.997667081978825]
  In spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics. Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.
  arXiv  Detail & Related papers  (2020-04-27T15:48:24Z)

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.