Analytical results for laser models producing a beam with sub-Poissonian photon statistics and coherence scaling as the Heisenberg limit
- URL: http://arxiv.org/abs/2502.16883v2
- Date: Wed, 05 Mar 2025 02:07:52 GMT
- Title: Analytical results for laser models producing a beam with sub-Poissonian photon statistics and coherence scaling as the Heisenberg limit
- Authors: Lucas A. Ostrowski, Travis J. Baker, Dominic W. Berry, Howard M. Wiseman,
- Abstract summary: We characterize the dynamics of each laser system, and find that some of the intuitions from standard laser theory may be applied here.<n>Unlike a standard laser, however, we find that the pure states comprising the ensemble in the Heisenberg-limited lasers are substantially phase squeezed.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Recent advances in laser theory have demonstrated that a quantum enhancement is possible for the production of coherence $\mathfrak{C}$ by a continuous-wave laser device. Curiously, natural families of laser models that achieve Heisenberg-limited scaling for coherence produce the most coherence when the beam exhibits sub-Poissonian photon statistics. In this work, we provide an analytical treatment of those novel families of laser models by specializing to a parameter regime that permits a linearization. We characterize the dynamics of each laser system, and find that some of the intuitions from standard laser theory may be applied here. Specifically, the intracavity number dynamics are well-described as an Ornstein-Uhlenbeck process, while the intracavity phase dynamics are well-described in terms of a physically realizable ensemble of pure states, which evolve according to pure phase diffusion. Unlike a standard laser, however, we find that the pure states comprising the ensemble in the Heisenberg-limited lasers are substantially phase squeezed. From our dynamical analysis, we deduce various quantities of the beam for each laser family, including the first- and second-order Glauber coherence functions, intensity noise spectrum, Mandel-Q parameter and coherence $\mathfrak{C}$. In addition, inspired from these phase diffusion dynamics, we derive an upper bound on laser coherence $\mathfrak{C} \lesssim 1.1156 \mu^4$ -- which is tighter by a factor of $3/8$ when compared to that derived in [Baker et al., Nat. Phys. 17 179 (2021)] -- by making one of the assumptions of that paper slightly stronger.
Related papers
- Laser Mpemba effect [0.0]
This work explores the emergence of Mpemba-like effects within the quantum theory of lasers.
By examining the temporal dynamics of photon number statistics in a single-mode laser above threshold, we reveal the curious and counterintuitive possibility that a laser system may reach its stationary nearly-Poissonian distribution faster than a system initially closer to equilibrium.
arXiv Detail & Related papers (2025-03-19T08:36:11Z) - Two-color laser control of photocurrent and high harmonics in graphene [2.6887381380521878]
We investigate two-color laser driven photocurrent and high harmonic generation (HHG) in graphene models.
We demonstrate that the HHG spectra can be drastically altered by tuning the spatial symmetry of the laser-field trajectory.
We also show that both the magnitude and the direction of photocurrent can be controlled by varying the frequency, intensity, ellipticity, and phase of the two-color laser.
arXiv Detail & Related papers (2024-10-10T09:54:41Z) - Evidence of the quantum-optical nature of high-harmonic generation [0.0]
We show that high-harmonic generation can generate non-classical states of light before the decoherence of the system.
This could address challenges in quantum technology such as scalability, decoherence or the generation of massively entangled states.
arXiv Detail & Related papers (2024-05-23T19:53:45Z) - Phase Randomness in a Semiconductor Laser: the Issue of Quantum Random
Number Generation [83.48996461770017]
This paper describes theoretical and experimental methods for estimating the degree of phase randomization in a gain-switched laser.
We show that the interference signal remains quantum in nature even in the presence of classical phase drift in the interferometer.
arXiv Detail & Related papers (2022-09-20T14:07:39Z) - Optimized Laser Models with Heisenberg-Limited Coherence and
Sub-Poissonian Beam Photon Statistics [0.0]
We introduce three new families of laser models which may be considered as generalizations of those presented in this paper.
We explore the influence of these parameters on both the coherence and photon statistics of the laser beams.
arXiv Detail & Related papers (2022-08-30T08:51:57Z) - Oscillator laser model [77.34726150561087]
Diffusion coefficients, consistent with the model and necessary for solving quantum nonlinear laser equations analytically, are found.
Collective Rabi splitting peaks are predicted in the intensity fluctuation spectra of the superradiant lasers.
arXiv Detail & Related papers (2022-06-11T07:38:31Z) - Quantum density matrix theory for a laser without adiabatic elimination
of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory.
Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons.
This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
arXiv Detail & Related papers (2022-05-26T16:33:51Z) - 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) - Perturbation approach in Heisenberg equations for lasers [77.34726150561087]
It is found that fluctuations of population significantly affect spontaneous and stimulated emissions into the lasing mode.
The method can be applied to various resonant systems in quantum optics.
arXiv Detail & Related papers (2022-01-08T18:24:37Z) - Conceptual Design Report for the LUXE Experiment [116.47875392913599]
We will reach this hitherto inaccessible regime of quantum physics by analysing high-energy electron-photon and photon-photon interactions.
The high photon flux predicted will enable a sensitive search for new physics beyond the Standard Model.
arXiv Detail & Related papers (2021-02-03T12:27:10Z)
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.