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Yesterday news, Long March 6 and Jilin-Hunchun HSR!China's new carrier rocket succeeds in first trip
2015-9-20 9:45:00
China successfully launched a new model of carrier rocket, Long March-6, at 7:01 am Sunday from the Taiyuan Satellite Launch Center in north China's Shanxi Province.Photo: Xinhua
China successfully launched a new model of carrier rocket, Long March-6, at 7:01 am Sunday from the Taiyuan Satellite Launch Center in north China's Shanxi Province.
The rocket carried 20 micro-satellites into the space, which will be used for space tests.
The new rocket is fueled by liquid propellant made of liquid oxygen and kerosene. It is China's first carrier rocket that uses fuel free of toxicity and pollution, said the source with the Shanghai Academy of Spaceflight Technology with the China Aerospace Science and Technology Corporation, which designed the rocket.
The launch has tested the feasibility and accuracy of the rocket's design as well as other new technologies.
The new carrier rocket will be mainly used for the launch of micro-satellites.
Scientists Uncover New Way of retaining Quantum Memories Stored in Light
Wed, 09/30/2015 - 10:45am
Chinese scientists have uncovered a novel way of stopping light in a state that stores information encoded in photons, opening the door to applications in quantum information processing.
A team of Chinese physicists has developed a way to confine light. This is significant because the approach allows quantum memories stored within photons to be retained, opening the door to applications in quantum information processing. The results may herald the advent of a multitude of hybrid, optoelectronic devices relying on the use of quantum information stored in photons for processing information that can be used in communication networks or quantum computing.
These findings stem from a study by Nan Sun from Nanjing University of Posts & Telecommunications, China, and colleagues, which has just been published in EPJ D.
Indeed, stopping and storing light for a duration ranging from a few seconds to a few minutes is key for quantum information processing. Unfortunately, certain media induce a loss of coherence of the light, due to effects of the surroundings, which, in turn, affects the integrity of the quantum information stored in photons. This new study focuses on understanding the propagation properties of the electromagnetic wave associated with light to learn how best to stop it.
Previous attempts at stopping light by Georg Heinze and colleagues from Technische Universität Darmstadt, Germany, showed it was possible to stop light for an entire minute. They dramatically slowed down light’s progression via interaction within its propagation medium.
In contrast, the authors here rely on electric and magnetic polarization to predict the conditions under which light could be confined. The authors’ theoretical approach is based on controlling the speed at which the light’s energy flows in order to stop it. At the same time, they also predict what it takes in terms of energy density to reach a stage where the electromagnetic waves constitutive of light can be stored, particularly in a medium in which waves travel at different speeds or are absorbed
Scientists Uncover New Way of retaining Quantum Memories Stored in Light