Non-Markovian dynamics with a giant atom coupled to a semi-infinite photonic waveguide

Li, Z. Y.; Shen, H. Z.

doi:10.1103/physreva.109.023712

Cited by 5 publications

(2 citation statements)

References 165 publications

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“…In contrast to a conventional small atom with point-like dipole approximation, the scale of the giant atoms becomes comparable to the wavelength of the light and thus the dipole approximation is broken. In the giant atom community, the quantum interference effect via the multiple coupling points brings out a variety of striking novel phenomena not existent in traditional small atoms, such as frequency-dependent decay rate and Lamb shift [21,22], unconventional bound states [23][24][25][26][27], decoherence-free interaction [12,[28][29][30], non-Markovian decay dynamics [31][32][33], chiral light-matter interation [34][35][36][37][38][39], phase-controlled frequency conversions [8], and entanglement generation or disentanglement [40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom

Zhou,

Zhu,

Zhang

et al. 2024

Laser Phys. Lett.

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We investigate a T-shaped single-photon router constructed by two waveguides connected via a giant Λ-type three-level atom. Under a real-space approach, the analytical expressions of the single-photon transmission and reflection amplitudes are obtained. It is shown that a high transfer-rate routing between two waveguides can be effectively achieved by modulating the phase difference, the accumulated phase and the atom-waveguide coupling strengths, and its frequencies can be tuned with a classical driving field. Interestingly, chiral scattering and a single-photon targeted router with direction selectivity have been realized by the ideally equivalent atom-waveguide interaction. We believe that our results have potential applications in constructing optical quantum devices and designing the single-photon quantum routing using the giant-atom setup.

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Section: Introductionmentioning

confidence: 99%

Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom

Zhou,

Zhu,

Zhang

et al. 2024

Laser Phys. Lett.

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“…Such memory effects are not accounted for in standard Markov approximations [26,27]. Recently, Shen et al examined non-Markovian effects within the framework of waveguide quantum electrodynamics [28,29], aiming to explore the generation of multiple complex single-photon wavepackets from an optical cavity coupled to driven three-level atoms with non-Markovian input-output fields.…”

mentioning

confidence: 99%

Stationary two-state system in optics using layered materials

Sasaki

2024

Phys. Scr.

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In scenarios where electrons are confined to a flat surface, such as graphene, quantizing electrodynamics reveals intriguing insights. We find that one of Maxwell’s equations manifests as part of the Hamiltonian, leading to novel constraints on physical states due to residual gauge invariance. We identify two quantum states with zero energy expectation values: one replicates the scattering and absorption of light, a phenomenon familiar in classical optics, while the other is more fundamentally associated with photon creation. These states form an inseparable two-state system, giving a new formula for reflection and transmission coefficients with photon emission effects. Notably, there exists a special thickness of the surface where these states decouple, offering intriguing possibilities for exploring physics through symmetry-based perturbations involving concepts of parity, axial gauge fields, and surface deformation.

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Phase-mediated single-photon scattering and nonreciprocal transmission in a coupled resonator waveguide with a three-level giant atom

Chen,

Zhu,

Zhang

et al. 2024

Laser Phys. Lett.

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We theoretically investigate single-photon scattering and nonreciprocal transmission in a coupled resonator waveguide which is coupled to a driven three-level giant atom via two distant sites. In our system, the local coupling phases are introduced to induce intriguing interference effects. As a result, the phase difference can serve as a sensitive controller for the photon scattering. It is found that the photon scattering properties can be effectively tailored by the size of the giant atom, the driving field and the phase difference. Intriguingly, by carefully tuning the parameters such as the atomic dissipation and the phase difference, a perfect nonreciprocal single-photon transmission can be realized. Additionally, the photon frequency can be adjusted by modulating Rabi frequency of the driving field. These results have significant potential for the development of nonreciprocal optical devices using the giant-atom configuration.

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Non-Markovian dynamics with a giant atom coupled to a semi-infinite photonic waveguide

Cited by 5 publications

References 165 publications

Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom

Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom

Stationary two-state system in optics using layered materials

Phase-mediated single-photon scattering and nonreciprocal transmission in a coupled resonator waveguide with a three-level giant atom

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