Nonlinear Optics Mediated by Chiral Waveguide QED: Generation of Momentum-anticorrelated Photon Pairs
- URL: http://arxiv.org/abs/2607.18562v1
- Date: Mon, 20 Jul 2026 22:52:58 GMT
- Title: Nonlinear Optics Mediated by Chiral Waveguide QED: Generation of Momentum-anticorrelated Photon Pairs
- Abstract summary: We present results on the properties of the incoherent component of the transmitted light after transmons chirally coupled to a waveguide.<n>The interplay between the waveguide driving and local driving modulates the contribution of the incoherent transmission.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In recent years, chiral quantum optics has emerged as an active research area due to the promising applications in quantum information processing as well as nonlinear optics. We present results on the properties of the incoherent component of the transmitted light after transmons chirally coupled to a waveguide. The well-known resonance fluorescence of one chiral transmon resembles nonlinear quantum optics as it can convert the coherent light, with photons having spatially extensive coherence and Poisson distribution, into a field with spatially localized coherence and bunching photon statistics. However, another chiral transmon can undo the effect of the first transmon regardless of the Rabi frequency under the idealization involved in this work. A full wavefunction calculation shows that, in the weak driving limit, this incoherent light mainly comes from two-photon processes - one chiral transmon converts two independent photons into a photon pair with opposite momentum shift. In addition to the driving through the waveguide, a local driving with independently tunable amplitude and phase can address each transmon individually. The interplay between the waveguide driving and local driving modulates the contribution of the incoherent transmission and hence enables the engineering of the quantum statistics of the transmitted field, with tunable $g^{(2)}(0)$ spanning anti-bunched, coherent, and strongly bunched regimes.
Related papers
- Revival of transport reciprocity via quantum interference in asymmetric nonlinear devices [0.8002099400210113]
We study correlated 2-photon scattering where an artificial atom is asymmetrically side-coupled to an infinite waveguide at two spatially separated points.<n>The setup (a) gives robust reciprocal transport for the two photons.<n>The setup (b) shows a transition from a nonreciprocal to a reciprocal regime by tuning the interference effect via an additional tunneling path for photons between the two waveguides.
arXiv Detail & Related papers (2026-07-29T13:28:56Z) - Two-particle quantum interference in a nonlinear optical medium: a witness of timelike indistinguishability [9.138791215366014]
Hong-Ou-Mandel effect is a paradigmatic quantum phenomenon demonstrating the interference of two indistinguishable photons that are linearly coupled at a 50:50 beam splitter.<n>Here, we transpose such a two-particle quantum interference effect to the nonlinear regime, when two single photons are impinging on a parametric down-conversion crystal.<n>We experimentally demonstrate the suppression of the probability of detecting precisely one photon pair when the amplification gain is tuned to 2, which arises from the destructive interference between the transmitted and reborn photon pairs.
arXiv Detail & Related papers (2025-02-03T16:15:50Z) - Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Strong coupling between a single-photon and a two-photon Fock state [44.00303450801203]
We report an experimental observation of the strong coupling between a single-photon and a two-photon Fock state in an ultrastrongly-coupled circuit-QED system.<n>Results represent a key step towards a new regime of quantum nonlinear optics.
arXiv Detail & Related papers (2024-01-05T10:23:14Z) - Single-pass generation of widely-tunable frequency-domain entangled
photon pairs [0.0]
We demonstrate a technique that generates frequency-entangled photon pairs with high polarization definition by using a single-period nonlinear crystal and single pass configuration.
The generated photon pairs exhibit non-degenerate Hong-Ou-Mandel interference, indicating the presence of quantum entanglement in the frequency domain.
arXiv Detail & Related papers (2023-08-30T02:43:33Z) - Quantum vortices of strongly interacting photons [52.131490211964014]
Vortices are hallmark of nontrivial dynamics in nonlinear physics.
We report on the realization of quantum vortices resulting from a strong photon-photon interaction in a quantum nonlinear optical medium.
For three photons, the formation of vortex lines and a central vortex ring attests to a genuine three-photon interaction.
arXiv Detail & Related papers (2023-02-12T18:11:04Z) - Silicon nitride waveguides with intrinsic single-photon emitters for
integrated quantum photonics [97.5153823429076]
We show the first successful coupling of photons from intrinsic single-photon emitters in SiN to monolithically integrated waveguides made of the same material.
Results pave the way toward the realization of scalable, technology-ready quantum photonic integrated circuitry.
arXiv Detail & Related papers (2022-05-17T16:51:29Z) - Tunable directional photon scattering from a pair of superconducting
qubits [105.54048699217668]
In the optical and microwave frequency ranges tunable directionality can be achieved by applying external magnetic fields.
We demonstrate tunable directional scattering with just two transmon qubits coupled to a transmission line.
arXiv Detail & Related papers (2022-05-06T15:21:44Z) - Complete conversion between one and two photons in nonlinear waveguides
with tailored dispersion [62.997667081978825]
We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides.
We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance.
arXiv Detail & Related papers (2021-10-06T23:49:44Z) - Tunable quantum interference using a topological source of
indistinguishable photon pairs [0.0]
We demonstrate the use of a two-dimensional array of ring resonators to generate indistinguishable photon pairs.
We show that the linear dispersion of the edge states over a broad bandwidth allows us to tune the correlations.
Our results pave the way for scalable and tunable sources of squeezed light.
arXiv Detail & Related papers (2020-06-04T18:11:30Z) - 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.