“provocatively, some argue that reality is created at the time of a measure. Schrödinger did not agree with this interpretation, and devised a thought experiment to try to show a supposed contradiction of quantum mechanics” pointing to Hipertextual Dr. Jesus Navarro , the Institute of Corpuscular Physics (University of Valencia-CSIC). The known paradox of Schrodinger’s cat he served the physicist, awarded the Nobel Prize, to illustrate one of the least intuitive consequences of quantum mechanics.
Schrödinger used his famous paradox to illustrate one of the least intuitive consequences of quantum mechanics
” your system was a box inside which there is a cat, and a diabolical mechanism such that in certain interval of time can lead to break a capsule with poison and kill the cat. common sense says that after that time, the cat is alive or dead, but the description of quantum mechanics is that an overlap will live and dead cat. it’s not a matter of ignorance, subtle language or shortcomings of quantum mechanics. it is an extreme situation, referring to a macroscopic system, with which Schrödinger wanted to see the absurdity of the situation. the truth it is the property of coherence disappears in macroscopic systems, without yet know at what level does, “Navarro explained this medium. The paradox posed by the physicist now suffers the umpteenth twist. New experiments, published in Science , have shown that a quantum cat can be both alive and dead in two places at once.
They manage to manipulate complex quantum states
How is this possible? The paradox posed in any quantum system, such as an atom or a photon, can be a combination of several states, something called quantum superposition . The cat, being locked in the box with a hydrogen cyanide capsule, may or may not be alive. However, the researchers, who observed that box from the outside, can not know the state of the cat unless the open. In other words, while not directly see the animal, we can say that can be both alive and dead. Similarly, subatomic particles can be in one state or another. What’s new then brings the work now published in Science
The work demonstrates the ability to manipulate quantum states complex
on the one hand, its results represent perhaps the first time scientists were able to achieve such a microscopic scale quantum coherence. This finding implies that it is possible to induce a large number of photons having equal states, or they become entangled, so that the manipulate complex demonstrates quantum states . Navarro explains to Hipertextual , “the achievements of” cats “were achieved using photons, the particles that make up light, trapped in a microwave cavity.” This result was possible thanks to the work of Serge Haroche , awarded the Nobel Prize in Physics 2012. “His group in Paris managed to make nondestructive the number of photons measures,” the scientist IFIC, in other words, “prepare” statements cat “with more than two photons and study when quantum coherence breaks”.
the technical realization of these experiments, also collected in Science , it is very complex. Navarro cites a detail: the analysis of C. Wang and colleagues demanded that the devices were at a temperature of 20 millikelvin, ie about 273 degrees Celsius . “In this paper we have used two microwave cavities, connected by an auxiliary device, and manages to create a coherent superposition of two” cat states “different. Using its own exotic jargon, get ‘sizes cat” up to about 80 photons . with the auxiliary device (in the text of the Latin name “ancilla” is used) can manipulate these states and do some type of non-destructive measures. the interest of the work is that with two cavities significantly increases the ability to contain quantum information. a consequence of this increase is that would encode information redundantly, so it is important to correct transmission errors. According to the authors, this design allows might be used in a modular architecture for quantum computers, “says the researcher to this medium.
this is the first time such a quantum coherence is achieved at a microscopic scale
the study Science shows how scientists from Yale University and INRIA Paris-Rocquencourt could give photons two different states (like the cat, dead or alive) and observed similar state in the photons of the cavity adjacent . Wang’s team managed to measure the “size Cat” eighty photons, proving that you can reach larger dimensions by implementing specially controlled pulses. The fact that the quantum cat may be dead or alive at the same time in two different places, ie, the manipulation of many complex states can have important applications for computing and communication over long distances. “Since the eighties, when technical advances allowed make timely experiments have been considered possible uses of quantum coherence,” says Navarro, author of Quantum roads. Feynman . Among others, research in cryptography and the development of quantum computers can be favored by the umpteenth twist to the most famous cat in history.
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