Asymmetrical Input-output Control in Cavity Quantum Electrodynamics

2018 ◽  
pp. 77-88
Author(s):  
Yifu Zhu
Keyword(s):  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Input Output ◽  
Output Control

scholarly journals Universal remote quantum computation assisted by the cavity input–output process

2015 ◽  
Vol 471 (2184) ◽  
pp. 20150274 ◽  
Author(s):  
Ming-Xing Luo ◽  
Xiaojun Wang
Keyword(s):  
Quantum Computation ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Output Process ◽  
Input Output ◽  
Toffoli Gate ◽  
Classical Communication ◽  
Optical Cavities ◽  
Proposed Model ◽  
Einstein Podolsky Rosen

Quantum computing may provide potential superiority to solve some difficult problems. We propose a scheme for scalable remote quantum computation based on an interface between the photon and the spin of an electron confined in a quantum dot embedded in a microcavity. By successively interacting auxiliary photon pulses with spins charged in optical cavities, a prototypical quantum controlled–controlled flip gate (Toffoli gate) is achieved on a remote three-spin system using only one Einstein–Podolsky–Rosen entanglement, and local operations and classical communication. Our proposed model is shown to be robust to practical noise and experimental imperfections in current cavity–quantum electrodynamics techniques.

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.

Cavity quantum electrodynamics

2006 ◽  
Vol 69 (5) ◽  
pp. 1325-1382 ◽  
Author(s):  
Herbert Walther ◽  
Benjamin T H Varcoe ◽  
Berthold-Georg Englert ◽  
Thomas Becker
Keyword(s):  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics

RECENT ADVANCES IN TWO-DIMENSIONAL PHOTONIC CRYSTALS SLAB STRUCTURE: DEFECT ENGINEERING AND HETEROSTRUCTURE

NANO ◽  
2007 ◽  
Vol 02 (01) ◽  
pp. 1-13 ◽  
Author(s):  
BONG-SHIK SONG ◽  
TAKASHI ASANO ◽  
SUSUMU NODA
Keyword(s):  
Photonic Crystals ◽  
Optical Sensors ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Design Rule ◽  
Two Dimensional ◽  
Defect Engineering ◽  
Nanophotonic Devices ◽  
Multiple Wavelength ◽  
Accelerate Development

This paper presents a review on the selected highlights of highly-functional devices in two-dimensional photonic crystals slab structure. By introducing artificial defects in the photonic crystals (that is, defect engineering), novel photonic devices of line-defect waveguides and point-defect nanocavity are demonstrated. For more efficient manipulation of photons, the fundamentals of heterostructure photonic crystals are also reviewed. Heterostructures consist of multiple photonic crystals with different lattice-constants and they provide further high-functionalities such as multiple wavelength operation while maintaining optimized performance and the enhancement of photon manipulation efficiency. Because of the importance of high quality (Q) nanocavity for realization of nanophotonic devices, we also review the design rule of high Q nanocavities and present recent experiments on nanocavities with Q factors in excess of one million (~ 1.2 × 106). The progress of defect engineering and heterostructure in two-dimensional photonic crystals slab structure will accelerate development in ultrasmall photonic chips, cavity quantum electrodynamics, optical sensors, etc.

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