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Article
Physics, Multidisciplinary
Qing-Yang Qiu et al.
Summary: We investigate the non-Markovian dynamics of two giant artificial atoms interacting with a continuum of bosonic modes. Exact analytical solutions are presented, predicting the phenomena of collective radiance. The occurrence of super-superradiance and the transition from superadiance to subradiance are found, and multiple bound states in continuum (BICs) are observed. The trapped photons/phonons in BICs can be easily released by changing the energy level splitting of giant atoms.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Optics
Kian Hwee Lim et al.
Summary: In this work, we investigate the oscillating bound state in a one-dimensional photonic lattice coupled to a giant atom at multiple points. Our study reveals the contribution of the finite energy band to the oscillating bound state phenomenon, and demonstrates that the bound states outside the energy band can be suppressed by increasing the number of coupling points or the separation between each coupling point. We also find that non-Markovianity is crucial for the existence of oscillating bound states, and the oscillation amplitude increases with the characteristic delay time of the giant atom interactions. Additionally, we propose an initialization scheme in the bound state subspace. Our findings can be experimentally implemented on current photonic waveguide array platforms and have potential implications for quantum information storage in photonic lattices using reservoir engineering.
Article
Optics
Ning Liu et al.
Summary: We theoretically investigate the scattering properties of single photons in a waveguide chirally coupled to a giant atom. When considering the energy loss of the giant atom, the transmission spectrum of a single photon depends on its incident direction. We calculate the difference in transmission probabilities for opposite transport directions, denoted as Delta T. It is found that the position and width of Delta T are both dependent on the size of the giant atom. Furthermore, the position and frequency width of the maximum Delta T can be modulated by a classical laser beam. Our findings are relevant for the control of single photons in the design of quantum devices involving giant atoms.
Article
Physics, Multidisciplinary
Lei Du et al.
Summary: This article proposes a scheme for constructing giant atoms in a synthetic frequency dimension and compares it with real-space giant atoms. The results show that chiral interactions between the atom and the frequency lattice can be achieved by tuning the phase of the external field.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Zi-Qi Wang et al.
Summary: In this study, the coupling strength between a giant spin ensemble and a meandering waveguide is continuously tuned from finite to zero by varying the frequency. Extraordinary phenomena that cannot be observed in conventional systems are found in the collective behavior of the two giant spin ensembles in the nested configuration. This experiment offers a new platform for 'giant atom' physics.
NATURE COMMUNICATIONS
(2022)
Article
Quantum Science & Technology
Han Xiao et al.
Summary: This study explores a model of dynamically-modulated coupled-resonator waveguide coupled with a giant atom, and discovers the existence of bound state photons. These photons exhibit localization effects and their decay into resonator modes is inhibited by the atom. By analyzing the relationship between propagating states and localized states of light, an explanation is proposed, demonstrating the presence of a quantum channel where propagating photons can be converted into localized states through quantum interference from light-atom interactions in different detuned resonators. This research highlights the potential for actively localizing photons in a modulated coupled-resonator waveguide system interacting with a giant atom, and provides a way to study light-atom interactions in a synthetic frequency dimension.
NPJ QUANTUM INFORMATION
(2022)
Article
Optics
Xin Wang et al.
Summary: We propose a quantum electrodynamics platform in which quantum emitters interact with a Hofstadter-ladder waveguide. We demonstrate several intriguing phenomena, including chiral spontaneous emission, periodically modulated dynamics of emitters of the giant atom form, and the dipole-dipole interaction between two giant emitters mediated by bound states.
Article
Optics
Ariadna Soro et al.
Summary: In this paper, the coupling between superconducting qubits and a one-dimensional waveguide is studied. It is found that when the coupling is chiral, a decoherence-free interaction can be achieved. Furthermore, conditions under which giant atoms in chiral architectures exhibit dark states are derived. The results of this study are of great significance for quantum simulations and quantum networks based on giant atoms with chiral settings.
Article
Physics, Multidisciplinary
Gang-hui Zeng et al.
Summary: In this experiment, a circuit quantum acoustodynamics system was studied with a superconducting artificial atom coupled to both a 2D surface acoustic wave resonator and a 1D microwave transmission line. Strong coupling between the artificial atom and the acoustic wave resonator was confirmed, and the impact of temperature on the system was demonstrated. The spectrum structure of the Rabi splitting changed under specific experimental conditions and gradually disappeared with increasing environmental temperature. Additionally, a continuous quantum-to-classical crossover was observed around a crossover temperature T(c).
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Xin Wang et al.
Summary: This proposal presents tunable chiral bound states in a system consisting of superconducting giant atoms and a Josephson photonic-crystal waveguide, offering potential applications in experiments for realizing topological phase transitions and quantum simulations using superconducting circuits.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Stefano Longhi
Summary: In this study, a simple photonic structure is investigated, and it is shown that breaking mirror symmetry and allowing for non-nearest neighbor couplings can sustain a pair of quasi-BIC states, enabling weakly damped embedded Rabi oscillations of photons between the waveguides.
Article
Optics
A. M. Vadiraj et al.
Summary: Artificial atoms made from superconducting circuits have enabled new frontiers in light-matter coupling, including the study of giant atoms. By implementing a giant artificial atom using a transmon qubit coupled to propagating microwaves at multiple points along an open transmission line, we observed novel effects such as strong frequency-dependent couplings and engineered metastable excited states.
Article
Multidisciplinary Sciences
Bharath Kannan et al.
Article
Physics, Multidisciplinary
Lingzhen Guo et al.
PHYSICAL REVIEW RESEARCH
(2020)
Article
Optics
Wei Zhao et al.
Article
Multidisciplinary Sciences
Mohammad Mirhosseini et al.
Article
Physics, Multidisciplinary
A. Gonzalez-Tudela et al.
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Gustav Andersson et al.
Article
Physics, Multidisciplinary
P. Y. Wen et al.
PHYSICAL REVIEW LETTERS
(2019)
Article
Multidisciplinary Sciences
Yiwen Chu et al.
Review
Physics, Multidisciplinary
Xiu Gu et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2017)
Article
Optics
Lingzhen Guo et al.
Article
Physics, Multidisciplinary
I. -C. Hoi et al.
Article
Optics
Z. H. Wang et al.
Article
Optics
Anton Frisk Kockum et al.
Article
Multidisciplinary Sciences
Martin V. Gustafsson et al.
Article
Physics, Multidisciplinary
Lan Zhou et al.
PHYSICAL REVIEW LETTERS
(2013)
Article
Multidisciplinary Sciences
Arjan F. van Loo et al.
Article
Physics, Multidisciplinary
Sergey Bravyi et al.
Article
Physics, Multidisciplinary
Io-Chun Hoi et al.
PHYSICAL REVIEW LETTERS
(2011)
Article
Multidisciplinary Sciences
O. Astafiev et al.
Article
Physics, Multidisciplinary
Lan Zhou et al.
PHYSICAL REVIEW LETTERS
(2008)
Article
Optics
Yong Li et al.
