scholarly journals An inhibited laser

2021 ◽  
Author(s):  
Tiantian Shi ◽  
Duo Pan ◽  
Jingbiao Chen
Keyword(s):  
Quantum Electrodynamics ◽  
Resonant Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Stimulated Emission ◽  
Optical Clock ◽  
Spontaneous Radiation ◽  
Integer Multiple ◽  
Cavity Resonances ◽  
Further Development ◽  
Active Optical Clock

Abstract Traditional lasers function using resonant cavities, in which the round-trip optical path is exactly equal to an integer multiple of the intracavity wavelengths to constructively enhance the spontaneous emission rate. By taking advantage of the resonant cavity enhancement, the narrowest sub-10-mHz-linewidth laser and a 10^-16-fractional-frequency-stability superradiant active optical clock (AOC) have been achieved. However, never has a laser with atomic spontaneous radiation being destructively inhibited in an anti-resonant cavity where the atomic resonance is exactly between two adjacent cavity resonances been proven. Herein, we present the first demonstration of the inhibited stimulated emission, which is termed an inhibited laser. Compared with traditional superradiant AOCs exhibiting superiority for the high suppression of cavity noise in lasers, the effect of cavity pulling on the inhibited laser's frequency can be further suppressed by a factor of (2F/π)^2. This study of the inhibited laser will guide further development of superradiant AOCs with better stability, and may lead to new searches in the cavity quantum electrodynamics (QED) field.

Atoms and Light: Quantum Theory

2019 ◽  
pp. 269-324
Author(s):  
Peter W. Milonni
Keyword(s):  
Quantum Electrodynamics ◽  
Experimental Studies ◽  
Bell Inequalities ◽  
Cavity Quantum Electrodynamics ◽  
Stimulated Emission ◽  
Light Quantum ◽  
Resonance Fluorescence ◽  
Hidden Variable ◽  
Dressed States ◽  
Scattered Fields

Some of the most basic aspects of the interaction of atoms with light are considered, with emphasis on distinctly quantum-electrodynamical effects. Absorption and stimulated emission are associated with interference between incident and scattered fields. The JaynesCummings model, collapses and revivals, and dressed states are discussed along with related experimental studies in cavity quantum electrodynamics. Entangled states are associated with the interference of probability amplitudes for indistinguishable processes. The no-cloning theorem is reviewed. Von Neumann’s proof concerning hidden variable theories is examined and used to introduce Bell’s theorem and its proof. Resonance fluorescence spectra and photon anti-bunching correlations are calculated and compared with experiment. Photon polarization correlations in atomic cascades are calculated from the perspectives of both source fields and entanglement, and experimental studies of these correlations and Bell inequalities are reviewed.

QUANTUM SECURE DIRECT COMMUNICATION WITH ONLY SEPARATE MEASUREMENTS IN DRIVEN CAVITY QED

2010 ◽  
Vol 08 (03) ◽  
pp. 457-464
Author(s):  
CHUAN-JIA SHAN ◽  
TAO CHEN ◽  
JI-BING LIU ◽  
TANG-KUN LIU ◽  
YAN-XIA HUANG ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Cavity Qed ◽  
Resonant Cavity ◽  
Bell State ◽  
Quantum Secure Direct Communication ◽  
Single Mode ◽  
Cavity Quantum Electrodynamics ◽  
Direct Communication ◽  
Legitimate User ◽  
Communication Processes

An experimentally feasible new scheme for quantum secure direct communication is proposed in cavity quantum electrodynamics without apparent joint Bell-state measurement. The legitimate user can receive different secret messages in a direct way through Einstein–Podolsky–Rosen (EPR) pairs, the probability of the success in our scheme is unity. In the communication processes, the interactions between atoms and a single-mode non-resonant cavity with the assistance of a strong classical driving field substitute the joint measurements. Hence, this scheme needs only separate measurements. In addition, the scheme is insensitive to the cavity decay and the thermal field. The discussion of the scheme indicates that it can be realized based on current technologies.

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

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.

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