Article
Multidisciplinary Sciences
Rosario R. Riso, Tor S. Haugland, Enrico Ronca, Henrik Koch
Summary: The authors introduce a fully consistent ab-initio method of molecular orbital theory applicable to material systems in quantum electrodynamics environments. The method can be used to predict and explain modifications of molecular properties due to cavity induced effects.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Rocio Saez-Blazquez, Daniele de Bernardis, Johannes Feist, Peter Rabl
Summary: This study addresses the possibility of generating nonperturbative corrections to the ground state of a dipole by coupling it to a strongly confined electromagnetic vacuum. Two simplified cavity QED setups are considered, providing analytic expressions for the total ground-state energy and distinguishing between electrostatic and vacuum-induced contributions. The findings suggest that the presence of high-impedance modes can significantly increase the vacuum-induced effects, opening up the possibility of nonperturbative light-matter interactions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Alexander D. White, Rahul Trivedi, Kalyan Narayanan, Jelena Vuckovic
Summary: This paper studies the impact of dynamic modulation on the interplay between superradiance and spectral disorder. The results show that the effective cooperativity of the superradiant mode can be multiplicatively enhanced with a quantum control protocol modulating the resonant frequency of the optical mode. This is relevant to the experimental demonstration of superradiance in solid-state quantum optical systems where spectral disorder is a significant technological impediment.
Article
Optics
Sergi Terradas-Brianso, Carlos A. Gonzalez-Gutierrez, Franco Nori, Luis Martin-Moreno, David Zueco
Summary: In this paper, the interaction of giant atoms with waveguides in the ultrastrong-coupling regime beyond the rotating-wave approximation is studied. The equilibrium properties of the system and the dynamics of initially excited giant atoms are analyzed, showing features of virtual photons and oscillating bound states beyond the rotating-wave approximation.
Article
Engineering, Mechanical
Kashif Ammar Yasir, Yu Chengyong, Gao Xianlong
Summary: In this study, we investigate the steady-state multi-stability of a cavity system containing spin-orbit coupled Bose-Einstein condensate. We show that the cavity photon number and atomic population exhibit multi-stable behavior, which can be tuned with system parameters. Additionally, we find the occurrence of population transitional phase for the atomic states, which can be controlled by spin-orbit coupling and Zeeman field effects.
NONLINEAR DYNAMICS
(2023)
Article
Physics, Multidisciplinary
Fan Yang, Mads M. Lund, Thomas Pohl, Peter Lodahl, Klaus Molmer
Summary: Researchers have presented a method to classify quantum fields by using a pair of two-level emitters coupled to a waveguide, which can scatter the single and two-photon components of an input pulse into orthogonal temporal modes. The method achieves a high fidelity and can be used to construct logic elements.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Yuhao Pan, Li Li, Xiaolong Zhou, Dongyu Huang, Zemin Shen, Jian Wang, Chuanfeng Li, Guangcan Guo
Summary: The ultracold molecule is a promising candidate for versatile quantum tasks due to its long-range interaction and rich internal rovibrational states. By utilizing cavity quantum electrodynamics (QED) effects, an optical cavity can enhance the formation efficiency of photoassociated molecules and enable non-demolition detection of the internal states of molecules. We demonstrate the production of a high-finesse optical fiber microcavity for the Rb2 molecule cavity QED experiment, which facilitates the study of molecule cavity QED research.
CHINESE OPTICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Juan Roman-Roche, Fernando Luis, David Zueco
Summary: A system of magnetic molecules coupled to microwave cavities undergoes the equilibrium superradiant phase transition, which is experimentally observable. The coupling effect is illustrated by the vacuum-induced ferromagnetic order in a quantum Ising model and the modification of the magnetic phase diagram of Fe-8 dipolar crystals, showcasing the cooperation between intrinsic and photon-induced spin-spin interactions. Finally, a transmission experiment demonstrates the quantum electrodynamical control of magnetism in resolving the transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Johann Rafelski, Stefan Evans, Lance Labun
Summary: Using the external-field method, the nonperturbative properties of QED with arbitrary gyromagnetic ratio g are explored by evaluating the effective action V-eff for a strong constant and homogeneous field. A cusp at g = 2 is found in (a) the QED b(0)-renormalization group coefficient, and in the infinite-wavelength limit in (b) a subclass containing the pseudoscalar P-2n = ((E) over right arrow center dot (B) over right arrow)(2n) of light-light scattering coefficients. The properties of b(0) imply asymptotic freedom in an Abelian theory for certain domains of g.
Review
Nanoscience & Nanotechnology
D. N. Basov, Ana Asenjo-Garcia, P. James Schuck, Xiaoyang Zhu, Angel Rubio
Summary: This brief review summarizes and elaborates on the nomenclature of polaritonic phenomena and systems in the literature on quantum materials and quantum optics, including at least 70 different types of polaritonic light-matter dressing effects. It also unravels a broad panorama of the physics and applications of polaritons, with a constantly updated version available at https://infrared.cni.columbia.edu.
Article
Engineering, Electrical & Electronic
Cong Cao, Yu-Hong Han, Xin Yi, Pan-Pan Yin, Xiu-Yu Zhang, Yong-Pan Gao, Ling Fan, Ru Zhang
Summary: This paper proposes a simple and deterministic scheme for implementing a single-photon fully quantum router by combining cavity quantum electrodynamics and linear optics, with advantages in coherent quantum information processing and high experimental feasibility. The device meets all the requirements for a fully featured quantum router and is easily scalable for multiqubit quantum routing, showing potential for integration with protocols for quantum information processing and complex quantum networks in the future.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Physics, Applied
Ramachandrarao Yalla, K. Muhammed Shafi, Kali P. Nayak, Kohzo Hakuta
Summary: In this study, we demonstrate the creation of a one-sided cavity on an optical nanofiber using a composite method. The one-sided composite cavity is designed to enhance channeling efficiency and its coupling characteristics are validated through numerical simulations and experiments.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Fabijian Pavosevic, Sharon Hammes-Schiffer, Angel Rubio, Johannes Flick
Summary: This study investigates the possibility of modulating the rate of proton transfer reactions by exploiting the light-matter coupling. The researchers found that by adjusting the polarization direction of the optical cavity, the energy barrier of the proton transfer reaction can be increased or decreased.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Optics
Zhi-Yuan Fan, Liu Qiu, Simon Groblacher, Jie Li
Summary: A new mechanism for preparing stationary entanglement between microwave and optical cavity fields in a cavity optomagnomechanical system is proposed. It utilizes the interaction between a magnon mode in a ferrimagnetic crystal with microwave and optical cavity modes, and creates entanglement through magnomechanical parametric down-conversion and simultaneous optomechanical and electromagnonic interactions.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Beatriz Perez-Gonzalez, Alvaro Gomez-Leon, Gloria Platero
Summary: This study explores the physics of topological lattice models immersed in c-QED architectures with arbitrary coupling strength with the photon field. It proposes the use of cavity transmission as a topological marker and studies its behavior. The specific case of a fermionic Su-Schrieffer-Heeger (SSH) chain coupled to a single-mode cavity is used to illustrate the findings, which confirm that the cavity can act as a quantum sensor for topological phases. The persistence of topological features and the calculation of entanglement entropy are also discussed.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)