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Waveguide QED

Jonas Larson, Th. K. Mavrogordatos

Institute of Physics eBooksDec 1, 20210 citations

Waveguide QED with a giant transmon

A. M. Vadiraj, Chih-Hao Chang, Ibrahim Nsanzineza +1 more

Bulletin of the American Physical SocietyMar 4, 20190 citations

Driving a Dark State Qubit in 3D Waveguide QED

Maximilian Zanner, Christian Schneider, Mathieu L. Juan +4 more

Bulletin of the American Physical SocietyMar 4, 20200 citations

Floquet Engineering and Harnessing Giant Atoms in Frequency‐Comb Emission and Bichromatic Correlations in Waveguide QED

Qing‐Yang Qiu, Lili Zheng, Ying Wu +1 more

Abstract The capability to design spectrally controlled photon emission is not only fundamentally interesting for understanding frequency‐encoded light–matter interactions, but also is essential for realizing the preparation and manipulation of quantum states. Here, a dynamically modulated qubit array is considered, and realize frequency‐controlled single‐photon emission focusing on the generation of a frequency comb constituted solely of even‐parity or anti‐Stokes sidebands. This system also offers parity‐dependent bunching and antibunching in frequency‐filtered quantum correlations. In particular, the waveguide quantum electrodynamics (QED) setup is extended to include chiral and non‐local coupling architectures, thereby enhancing its versatility in Floquet engineering. This proposal also supports the predictable generation of high‐dimensional entangled quantum states, where the corresponding effective Hilbert space dimension is well controlled by energy modulation. Moreover, the utilisation of sophisticated numerical tools, such as the matrix product states (MPSs) and the discretization approach, enables the efficient simulation of multi‐photon dynamics, in which the non‐Markovian Floquet steady states emerge. This work fundamentally broadens the fields of collective emission, and has wide applications in implementing frequency‐encoded quantum information processing and many‐body quantum simulation.Abstract The capability to design spectrally controlled photon emission is not only fundamentally interesting for understanding frequency‐encoded light–matter interactions, but also is essential for realizing the preparation and manipulation of quantum states. Here, a dynamically modulated qubit array is considered, and realize frequency‐controlled single‐photon emission focusing on the generation of a frequency comb constituted solely of even‐parity or anti‐Stokes sidebands. This system also offers parity‐dependent bunching and antibunching in frequency‐filtered quantum correlations. In particular, the waveguide quantum electrodynamics (QED) setup is extended to include chiral and non‐local coupling architectures, thereby enhancing its versatility in Floquet engineering. This proposal also supports the predictable generation of high‐dimensional entangled quantum states, where the corresponding effective Hilbert space dimension is well controlled by energy modulation. Moreover, the utilisation of sophisticated numerical tools, such as the matrix product states (MPSs) and the discretization approach, enables the efficient simulation of multi‐photon dynamics, in which the non‐Markovian Floquet steady states emerge. This work fundamentally broadens the fields of collective emission, and has wide applications in implementing frequency‐encoded quantum information processing and many‐body quantum simulation.

arXiv:2502.09901Laser & Photonics ReviewFeb 13, 20255 citations

APPLICATIONS OF WAVEGUIDE QED IN TWO DIFFERENT REGIMES

LIM KIAN HWEE

Mar 5, 20250 citations

The comb waveguide: a new tool for strong interaction between atoms and light

Nikos Fayard, Adrien Bouscal, Jérémy Berroir +9 more

Coupling quantum emitters and nanostructures, in particular cold atoms and waveguides, has recently raised a large interest due to unprecedented possibilities of engineering light-matter interactions. However, the implementation of these promising concepts has been hampered by various theoretical and experimental issues. In this work, we propose a new type of periodic dielectric waveguide that provides strong interactions between atoms and guided photons with an unusual dispersion. We design an asymmetric comb waveguide that supports a slow mode with a quartic (instead of quadratic) dispersion and an electric field that extends far into the air cladding for an optimal interaction with atoms. We compute the optical trapping potential formed with two guided modes at frequencies detuned from the atomic transition. We show that cold Rubidium atoms can be trapped as close as 100 nm from the structure in a 1.3-mK-deep potential well. For atoms trapped at this position, the emission into guided photons is largely favored, with a beta factor as high as 0.88 and a radiative decay rate into the slow mode 10 times larger than the free-space decay rate.Coupling quantum emitters and nanostructures, in particular cold atoms and waveguides, has recently raised a large interest due to unprecedented possibilities of engineering light-matter interactions. However, the implementation of these promising concepts has been hampered by various theoretical and experimental issues. In this work, we propose a new type of periodic dielectric waveguide that provides strong interactions between atoms and guided photons with an unusual dispersion. We design an asymmetric comb waveguide that supports a slow mode with a quartic (instead of quadratic) dispersion and an electric field that extends far into the air cladding for an optimal interaction with atoms. We compute the optical trapping potential formed with two guided modes at frequencies detuned from the atomic transition. We show that cold Rubidium atoms can be trapped as close as 100 nm from the structure in a 1.3-mK-deep potential well. For atoms trapped at this position, the emission into guided photons is largely favored, with a beta factor as high as 0.88 and a radiative decay rate into the slow mode 10 times larger than the free-space decay rate.

EPJ Web of ConferencesJan 1, 20220 citations

The comb waveguide: a new tool for waveguide QED

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