Главная | Обратная связь | Поможем написать вашу работу!
МегаЛекции

Translate the sentences into Russian.




a) The stars in the night sky must have always fascinated human beings.

b) We know of Greek philosophers who proposed a heliocentric astronomical model with the Sun in the middle and the planets circulating around it as early as the 3rd century B.C., but it was Nicolaus Copernicus, who in the 16th century developed the first modern version of a model.

c) In the Copernican system, the stars were assumed to be fixed to a distant sphere and nothing in the observations indicated anything to the contrary.

d) Einstein did not like the concept of an expanding Universe and is said to have found the idea “abominable”.

e) The many nebulae which had been found in the sky were thought to be merely gas clouds in distant parts of the Milky Way.

f) The redshift of an object depends on its velocity radially away from us, and Slipher found that the nebulae seemed to move faster than the Milky Way escape velocity.

g) In a reply to Eddington, Lemaître also pointed out a logical consequence of an expanding Universe: The Universe must have existed for a finite time only, and must have emerged from an initial single quantum (in his words).

 


 

 

Unit 12

A New Era of Experimentation with Quantum Physics

 

The Nobel Prize in Physics 2012 —
Popular Release  

October 9, 2012

The Royal Swedish academy of Sciences decided to award the Nobel Prize in Physics for 2012 "for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems". The Nobel Prize is awarded to Serge Haroche Collège de France and Ecole Normale Supérieure, Paris, France, and David J. Wineland National Institute of Standards and Technology (NIST) and University of Colorado Boulder, CO, USA.

Read the text and explain what Serge Haroche’s and David J. Wineland’s scientific and technological breakthrough consists in.

Particle control in a quantum world

Serge Haroche and David J. Wineland have independently invented and developed methods for measuring and manipulating individual particles while preserving their quantum-mechanical nature, in ways that were previously thought unattainable.

The Nobel Laureates have opened the door to a new era of experimentation with quantum physics by demonstrating the direct observation of individual quantum particles without destroying them. For single particles of light or matter the laws of classical physics cease to apply and quantum physics takes over. But single particles are not easily isolated from their surrounding environment and they lose their mysterious quantum properties as soon as they interact with the outside world. Thus many seemingly bizarre phenomena predicted by quantum physics could not be directly observed, and researchers could only carry out thought experiments that might in principle manifest these bizarre phenomena.

Through their ingenious laboratory methods Haroche and Wineland together with their research groups have managed to measure and control very fragile quantum states, which were previously thought inaccessible for direct observation. The new methods allow them to examine, control and count the particles.

Their methods have many things in common. David Wineland traps electrically charged atoms, or ions, controlling and measuring them with light, or photons.

Serge Haroche takes the opposite approach: he controls and measures trapped photons, or particles of light, by sending atoms through a trap.

Both Laureates work in the field of quantum optics studying the fundamental interaction between light and matter, a field which has seen considerable progress since the mid-1980s. Their ground-breaking methods have enabled this field of research to take the very first steps towards building a new type of superfast computer based on quantum physics. Perhaps the quantum computer will change our everyday lives in this century in the same radical way as the classical computer did in the last century. The research has also led to the construction of extremely precise clocks that could become the future basis for a new standard of time, with more than hundred-fold greater precision than present-day caesium clocks.

(http://www.nobelprize.org/nobel_prizes/physics/laureates/2012
/press.html
)

David Wineland — Interview

Поделиться:





Воспользуйтесь поиском по сайту:



©2015 - 2024 megalektsii.ru Все авторские права принадлежат авторам лекционных материалов. Обратная связь с нами...