Emergence of second-order coherence in superfluorescence

• URL: http://arxiv.org/abs/2407.12549v1
• Date: Wed, 17 Jul 2024 13:30:16 GMT
• Title: Emergence of second-order coherence in superfluorescence
• Authors: Constanze Bach, Felix Tebbenjohanns, Christian Liedl, Philipp Schneeweiss, Arno Rauschenbeutel,
• Abstract summary: We investigate the second-order quantum coherence function of a superradiant burst in a cascaded quantum system. Our findings reveal that, despite the fundamentally different coupling Hamiltonian, superradiance in cascaded and symmetrically coupled systems feature a strikingly large number of similarities.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We experimentally investigate the second-order quantum coherence function of a superradiant burst in a cascaded quantum system. We chirally (i.e. direction-dependently) couple roughly 900 cesium atoms to the forward propagating mode of an optical nanofiber. We then prepare the ensemble in the maximally inverted state, where the subsequent collective emission of a burst is known as superfluorescence. Here, we observe that second-order coherence emerges in the course of the decay. This is a clear feature of the underlying collective dynamics that is also at the origin of the superradiant burst itself. We furthermore study the dynamics of the second-order coherence function of the emission in dependence on the initial average dipole moment of the ensemble. In addition, by correlating the detection of early and late photon emission events, we obtain evidence for fundamental shot-to-shot fluctuations in the delay of the start of the burst emission. Our findings reveal that, despite the fundamentally different coupling Hamiltonian, superradiance in cascaded and symmetrically coupled systems feature a strikingly large number of similarities.

Related papers

• Non-Markovian Collective Emission of Giant emitters in the Zeno Regime [0.0]
  We explore the collective Zeno dynamics of giant artificial atoms that are coupled, via multiple coupling points, to a common photonic or acoustic reservoir. We reveal that giant atoms build up their collective emission smoothly from the decay rate of zero to that predicted by Markovian approximation. Our results might be probed in state-of-art waveguide QED experiments, and fundamentally broaden the fields of collective emission in systems with giant atoms.
  arXiv  Detail & Related papers  (2024-06-21T01:22:40Z)
• 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)
• Delay-induced spontaneous dark state generation from two distant excited atoms [0.0]
  We investigate the collective non-Markovian dynamics of two fully excited two-level atoms coupled to a one-dimensional waveguide in the presence of delay. Our results are pertinent to long-distance quantum networks, presenting a mechanism for spontaneous entanglement generation between distant quantum emitters.
  arXiv  Detail & Related papers  (2023-03-12T03:50:07Z)
• Observation of superradiant bursts in a cascaded quantum system [0.0]
  Dicke superradiance describes the collective radiative decay of a fully inverted ensemble of two-level atoms. We experimentally investigate this effect for a chiral, i.e.,direction-dependent light--matter coupling. Our results shed light on the collective radiative dynamics of cascaded quantum many-body systems.
  arXiv  Detail & Related papers  (2022-11-16T14:36:10Z)
• Two-photon emission in detuned resonance fluorescence [0.0]
  We discuss two-photon correlations from the side peaks that are formed when a two-level system emitter is driven coherently. We show that their combination leads to a neat picture compatible with perturbative two-photon scattering. This should help to control, enhance and open new regimes of multiphoton emission.
  arXiv  Detail & Related papers  (2022-10-07T17:59:38Z)
• Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles [68.8204255655161]
  We consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser.
  arXiv  Detail & Related papers  (2022-05-10T06:54:54Z)
• Out-of-time-order correlator in the quantum Rabi model [62.997667081978825]
  We show that out-of-time-order correlator derived from the Loschmidt echo signal quickly saturates in the normal phase. We show that the effective time-averaged dimension of the quantum Rabi system can be large compared to the spin system size.
  arXiv  Detail & Related papers  (2022-01-17T10:56:57Z)
• 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)
• Quantum coherence and speed limit in the mean-field Dicke model of superradiance [0.0]
  We discuss the quantifying of quantum coherence for the Dicke model of superradiance in the mean-field approximation. We find the single-atom $l_1$-norm of coherence is given by the square root of the normalized average intensity of radiation emitted by the superradiant system.
  arXiv  Detail & Related papers  (2020-07-06T16:35:53Z)
• 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)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)

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.