Canadian physicists have made progress in research using pure light to build the logic gates of the quantum computer's basic components. They have succeeded in influencing other beams with single photons. The related papers were published in the latest issue of Nature Physics.
The logic gate operates on the input data to create a new output. In traditional computers, logic gates take the form of diodes or transistors. But quantum computer components are made from single atoms and subatomic particles. According to quantum theory, information processing will be accomplished through the interaction between particles.
Photons have many advantages in quantum computing, but it is always a difficult problem to let them interact with each other in a useful way. The latest research from the University of Toronto shows how to create such interactions.
According to the researcher of the Quantum Information and Quantum Computing Center at the University of Toronto and senior researcher at the Canadian Institute of Advanced Technology, Evelim Steinberger, the new study shows the effect of single photons on other beams. Beams of light in general can pass through each other without affecting each other. To build a light quantum computer, the beams must “talk†with each other, but they have not been implemented with single photons before.
The researchers first shot a single photon on a helium atom that had been cooled to a millionth degree above absolute zero. Photons then “entangle†with the atoms, affecting the way in which the Helium atoms interact with a single light beam. Photons change the refractive index of an atom, causing a small but measurable “phase shift†in the beam.
This process can be used as an all-optical quantum logic gate that implements input, information processing, and output. Steinberger said that the quantum logic gate is the most significant application of this research. It can be observed that these interactions have opened a new page in the field of optical research. (Reporter Feng Weidong)
I System description:
Heat Shrinkable Tape is designed to protect the weld joint of buried or exposed steel pipelines and insulated pipeline. This sleeves are manufactured from high quality cross linked polyethylene material. Hot melt adhesive provides excellent adhesion with the surface of steel pipeline, PE coating. Meanwhile it forms a continuous and firm anti-corrosive system with the surface of the pipeline.
The Polyethylene Heat shrinkable Tape needs no primer nor patch closure and reduces application time and labour costs.
â…¡ Structure
The specification of the tape consists of three layers,
Adhesive: butyl rubber based hot melt adhesive
Film backing: Radiation crosslinked polyethylene
Interleaf:Antiadhesive Film Treated with Silicone
â…¢ Features
After heating, formed corrosion protection seal
Strong backing provides outstanding waterproofing effect
High chemical resistance. resists impact, abrasion and ultraviolet light.
Excellent resistance against cathodic disbondment, dielectric breakdown.
Simple Application
â…£ Physical Properties
· Product Data Sheet Total Thickness:40mil, 50 mil,60 mil ,65 mils.
· Width:50,100,150,300,400,500,800 mm
· Length: 10 m
· Tensile Strength:35 N/cm
· Elongation:400%
· Adhesion Strength to pipe:30 N/cm
· Application temperature: -10 -60 ℃
· Temperature resistance:-50 ℃ - 80℃
· Shelf Life: 12 months
â…¤ Application
No Special skills, equipments, patch closure nor primer are needed. Its superior flexibility provides easy and reliable application for irregular configurations of fittings, bends and elbows and small diameter of straight pipes
Wrap spirally the tape over foreign matters-free and preheated surface, beginning at least 25~50mm (1~2 ) onto pipe coating. Wrap the tape with enough tension to obtain conformability and with minimum 50% of overlapping, while removing the release liner. Warm the end part of the tape and press down firmly. Using a torch, start at the edge of the tape and heat circumferentially around the coated pipe.
Finish off by heating over the entire tape vertically to ensure a uniform adhesion and by using a roller or gloved hands to remove wrinkle and air.
VI. Technical Datas
Heat Shrinkable Tape
Heat Shrinkable Tape, Shrink Wrap Tape, Heat Applied Tape
Jining Xunda Pipe Coating Materials Co.,Ltd , http://www.pipe-wrap.com