scholarly journals Room-temperature cavity quantum electrodynamics with strongly coupled Dicke states

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Jonathan D. Breeze ◽  
Enrico Salvadori ◽  
Juna Sathian ◽  
Neil McN. Alford ◽  
Christopher W. M. Kay
Keyword(s):  
Quantum Electrodynamics ◽  
Room Temperature ◽  
Cavity Quantum Electrodynamics ◽  
Strongly Coupled ◽  
Dicke States

scholarly journals Intrinsically ultrastrong plasmon–exciton interactions in crystallized films of carbon nanotubes

2018 ◽  
Vol 115 (50) ◽  
pp. 12662-12667 ◽  
Author(s):  
Po-Hsun Ho ◽  
Damon B. Farmer ◽  
George S. Tulevski ◽  
Shu-Jen Han ◽  
Douglas M. Bishop ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Electrodynamics ◽  
Near Infrared ◽  
Cavity Quantum Electrodynamics ◽  
Optical Switches ◽  
Optical Antennas ◽  
Strongly Coupled ◽  
Exciton Coupling ◽  
Exciton Interactions ◽  
Nanotube Films

In cavity quantum electrodynamics, optical emitters that are strongly coupled to cavities give rise to polaritons with characteristics of both the emitters and the cavity excitations. We show that carbon nanotubes can be crystallized into chip-scale, two-dimensionally ordered films and that this material enables intrinsically ultrastrong emitter–cavity interactions: Rather than interacting with external cavities, nanotube excitons couple to the near-infrared plasmon resonances of the nanotubes themselves. Our polycrystalline nanotube films have a hexagonal crystal structure, ∼25-nm domains, and a 1.74-nm lattice constant. With this extremely high nanotube density and nearly ideal plasmon–exciton spatial overlap, plasmon–exciton coupling strengths reach 0.5 eV, which is 75% of the bare exciton energy and a near record for room-temperature ultrastrong coupling. Crystallized nanotube films represent a milestone in nanomaterials assembly and provide a compelling foundation for high-ampacity conductors, low-power optical switches, and tunable optical antennas.

High-Finesse Micro-Optical Fabry-Perot Cavity and Its Applications in Strongly Coupled Cavity Quantum Electrodynamics

2021 ◽  
Vol 41 (1) ◽  
pp. 0127001
Author(s):  
张天才 Zhang Tiancai ◽  
毋伟 Wu Wei ◽  
杨鹏飞 Yang Pengfei ◽  
李刚 Li Gang ◽  
张鹏飞 Zhang Pengfei
Keyword(s):  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Strongly Coupled ◽  
Fabry Perot ◽  
High Finesse ◽  
Coupled Cavity

scholarly journals Single-atom transfer in a strongly coupled cavity quantum electrodynamics: experiment and Monte Carlo simulation

2014 ◽  
Vol 63 (24) ◽  
pp. 244205
Author(s):  
Li Wen-Fang ◽  
Du Jin-Jin ◽  
Wen Rui-Juan ◽  
Yang Peng-Fei ◽  
Li Gang ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Single Atom ◽  
Atom Transfer ◽  
Strongly Coupled ◽  
Coupled Cavity

scholarly journals Cavity quantum electrodynamics with ferromagnetic magnons in a small yttrium-iron-garnet sphere

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Dengke Zhang ◽  
Xin-Ming Wang ◽  
Tie-Fu Li ◽  
Xiao-Qing Luo ◽  
Weidong Wu ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Yttrium Iron Garnet ◽  
Room Temperature ◽  
Cavity Mode ◽  
Cavity Quantum Electrodynamics ◽  
Microwave Cavity ◽  
Yttrium Iron ◽  
Damping Rate ◽  
Iron Garnet

AbstractHybridizing collective spin excitations and a cavity with high cooperativity provides a new research subject in the field of cavity quantum electrodynamics and can also have potential applications to quantum information. Here we report an experimental study of cavity quantum electrodynamics with ferromagnetic magnons in a small yttrium-iron-garnet (YIG) sphere at both cryogenic and room temperatures. We observe for the first time a strong coupling of the same cavity mode to both a ferromagnetic-resonance (FMR) mode and a magnetostatic (MS) mode near FMR in the quantum limit. This is achieved at a temperature ~22 mK, where the average microwave photon number in the cavity is less than one. At room temperature, we also observe strong coupling of the cavity mode to the FMR mode in the same YIG sphere and find a slight increase of the damping rate of the FMR mode. These observations reveal the extraordinary robustness of the FMR mode against temperature. However, the MS mode becomes unobservable at room temperature in the measured transmission spectrum of the microwave cavity containing the YIG sphere. Our numerical simulations show that this is due to a drastic increase of the damping rate of the MS mode.

scholarly journals Large cooperativity in strongly coupled chip-scale photonic-atomic integrated system

2021 ◽  
Author(s):  
Alex Naiman ◽  
Yoel Sebbag ◽  
Eliran Talker ◽  
Yefim Barash ◽  
Liron Stern ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Quantum Interference ◽  
Atomic System ◽  
Cavity Quantum Electrodynamics ◽  
Quantum Systems ◽  
Integrated System ◽  
Information Storage ◽  
Strongly Coupled ◽  
Rubidium Atoms ◽  
Coupling Rate

Abstract The miniaturization of atomic quantum systems and their integration into silicon microchips paves the way for a wide variety of applications in quantum computing, metrology and magnetometry. A particular interest is found in the integration of quantum entities into the micro and nanoscale photonic resonators to implement chip scale cavity quantum electrodynamics. Here we demonstrate the interaction of a chip scale micro disc resonator with thermal rubidium atoms via the evanescent field of the mode. We observe high Rabi splitting of 4 GHz in the transmission spectrum of the coupled photonic-atomic system due to collective enhancement of the coupling rate by the ensemble of hot atoms and present a theoretical model to support the measured results. This result corresponds to atom-photon cooperativity of ~ 1. Such cooperativity is the onset for quantum interference, needed for high-end chip scale quantum technologies, such as such as quantum manipulation, quantum information storage and processing, and few photon switching.

Quantum mechanical solution to spectral lineshape in strongly-coupled atomnanocavity system

2021 ◽  
Author(s):  
JIAN ZENG ◽  
ZHI-YUAN LI
Keyword(s):  
Integrated Circuits ◽  
Quantum Electrodynamics ◽  
Single Photon ◽  
Quantum Effect ◽  
Coupled System ◽  
Cavity Quantum Electrodynamics ◽  
Quantum Model ◽  
Rabi Splitting ◽  
Strongly Coupled ◽  
Spectral Lineshape

Abstract The strongly coupled system composed of atoms, molecules, molecule aggregates, and semiconductor quantum dots embedded within an optical microcavity/nanocavity with high quality factor and/or low modal volume has become an excellent platform to study cavity quantum electrodynamics (CQED), where a prominent quantum effect called Rabi splitting can occur due to strong interaction of cavity-mode single-photon with the two-level atomic states. In this paper, we build a new quantum model that can describe the optical response of the strongly-coupled system under the action of an external probing light and the spectral lineshape. We take the Hamiltonian for the strongly-coupled photon-atom system as the unperturbed Hamiltonian H 0 and the interaction Hamiltonian of the probe light upon the coupled-system quantum states as the perturbed Hamiltonian V. The theory yields a double Lorentzian lineshape for the permittivity function, which agrees well with experimental observation of Rabi splitting in terms of spectral splitting. This quantum theory will pave the way to construct a complete understanding for the microscopic strongly-coupled system that will become an important element for quantum information processing, nano-optical integrated circuits, and polariton chemistry.

scholarly journals DemonstratingW-type entanglement of Dicke states in resonant cavity quantum electrodynamics

2012 ◽  
Vol 86 (5) ◽  
Author(s):  
J. A. Mlynek ◽  
A. A. Abdumalikov ◽  
J. M. Fink ◽  
L. Steffen ◽  
M. Baur ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Resonant Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Dicke States
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