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We show that nonradiative interactions between atomic dipoles placed in a waveguide can give rise to deterministic entanglement at ranges much larger than their resonant wavelength. The range increases as the dipole-resonance approaches the…

Quantum Physics · Physics 2015-06-05 Ephraim Shahmoon , Gershon Kurizki

We study the collective radiative decay of a system of two two-level emitters coupled to a one-dimensional waveguide in a regime where their separation is comparable to the coherence length of a spontaneously emitted photon. The…

We study the collective decay of two-level emitters coupled to a nonlinear waveguide, for example, a nanophotonic lattice or a superconducting resonator array with strong photon-photon interactions. Under these conditions a new decay…

Quantum Physics · Physics 2020-06-01 Zhihai Wang , Tuomas Jaako , Peter Kirton , Peter Rabl

Photon emission is the hallmark of light-matter interaction and the foundation of photonic quantum science, enabling advanced sources for quantum communication and computing. Although single-emitter radiation can be tailored by the photonic…

This work introduces a theoretical framework to model the collective dynamics of quantum emitters in highly non-Markovian environments, interacting through the exchange of photons with significant retardations. The formalism consists on a…

Quantum Physics · Physics 2026-01-09 Carlos Barahona-Pascual , Hong Jiang , Alan C. Santos , Juan José García-Ripoll

We show that in a minimal setup of two waveguide-coupled quantum emitters, separated by long distances and subject to an external field, time-delayed feedback can be a resource for sensing field gradients. While the field gradient induces a…

Quantum Physics · Physics 2026-05-08 Prajit Dhara , Isack Padilla , Saikat Guha , Annyun Das , Kanu Sinha

Atoms interact with each other through the electromagnetic field, creating collective states that can radiate faster or slower than a single atom, i.e. super- and sub-radiance. The generation and control of such states by engineering the…

Waveguide quantum electrodynamics constitutes a modern paradigm for the interaction of light and matter, in which strong coupling, bath structure, and propagation delays can break the radiative conditions that quantum emitters typically…

Quantum Physics · Physics 2024-08-23 Alfonso Lanuza , Dominik Schneble

Recently, it has been suggested that the collective radiative decay of two point-like quantum emitters coupled to a waveguide, separated by a distance comparable to the coherence length of a spontaneously emitted photon, leads to an…

Optics · Physics 2020-08-18 Stefano Longhi

An array of initially excited emitters coupled to a one-dimensional waveguide exhibits superradiant decay under the Born-Markov approximation, manifested as a coherent burst of photons in the output field. In this work, we employ…

In this paper, we investigate the dynamics of a two-atom system which couples to a quasi-one dimensional waveguide with rectangle cross section. The waveguide supports different TM and TE modes and the former ones play as environment by…

Quantum Physics · Physics 2023-04-26 Yang Xue , Zhihai Wang

We examine quantum interference effects due to absorption and emission from multiple atoms coupled to a waveguide and highlight the modifications they entail in regards to single-photon transport properties. A prominent upshot of these…

Optics · Physics 2019-07-17 Debsuvra Mukhopadhyay , Girish S. Agarwal

In contrast to free space, in waveguides the dispersive and dissipative dipole-dipole interactions among quantum emitters exhibit a periodic behavior over remarkably long distances. We propose a novel setup exploiting this long-range…

Quantum Physics · Physics 2025-05-09 Martin Fasser , Laurin Ostermann , Helmut Ritsch , Christoph Hotter

We study a system of two distant quantum emitters coupled via a one-dimensional waveguide where the electromagnetic field has a direction-dependent velocity. As a consequence, the onset of collective emission is non-simultaneous and, for…

Quantum Physics · Physics 2022-05-04 P. Solano , P. Barberis-Blostein , K. Sinha

We consider the radiative properties of a system of two identical correlated atoms interacting with the electromagnetic field in its vacuum state in the presence of a generic dielectric environment. We suppose that the two emitters are…

Quantum Physics · Physics 2017-07-06 R. Palacino , R. Passante , L. Rizzuto , P. Barcellona , S. Y. Buhmann

We investigate single photon scattering properties in one-dimensional waveguide coupled to quantum emitter's chain with dipole-dipole interaction (DDI). The photon transport is extremely sensitive to the location of the evanescently coupled…

Quantum Physics · Physics 2017-05-10 Mu-Tian Cheng , Jingping Xu , Girish S. Agarwal

We study at the single-photon level the nonreciprocal excitation transfer between emitters coupled with a common waveguide. Non-Markovian retarded effects are taken into account due to the large separation distance between different…

Quantum Physics · Physics 2021-07-15 Lei Du , Mao-Rui Cai , Jin-Hui Wu , Zhihai Wang , Yong Li

We study the quantum dynamics of multiple two-level atoms (qubits) in a waveguide quantum electrodynamics system, with a focus on modified superradiance effects between two or four atoms with finite delay times. Using a numerically exact…

Quantum Physics · Physics 2025-06-23 Sofia Arranz Regidor , Franco Nori , Stephen Hughes

We study the superradiant decay of a chain of atoms coupled to a chiral waveguide, focusing on the regime of non-negligible photon propagation time. Using an exact master equation description which accounts for delay effects, we obtain…

Quantum Physics · Physics 2025-05-05 Bennet Windt , Miguel Bello , Daniel Malz , J. Ignacio Cirac

This review describes the emerging field of waveguide quantum electrodynamics (WQED) concerned with the interaction of photons propagating in a waveguide with localized quantum emitters. The collective emitter-photon interactions can lead…

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