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Quantum World

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Quantum World. Cookies on the New Scientist website close Our website uses cookies, which are small text files that are widely used in order to make websites work more effectively. To continue using our website and consent to the use of cookies, click away from this box or click 'Close' Find out about our cookies and how to change them Log in Your login is case sensitive I have forgotten my password close My New Scientist Look for Science Jobs Quantum world Introduction: Quantum world Quantum physics is mind-bending, but it is also one of the most successful scientific theories ever put forward.

Proto quantum computer inspired by Victorians gets a speed boost DAILY NEWS: 19:00 17 April 2015 A new approach has sped up a quantum device that exploits collisions between particles, signalling that the method may have yet more mileage in it Quantum purity: How the big picture banishes weirdness FEATURE: 20:00 08 April 2015 Nobody really understands the quantum world. Key to quantum gravity may lurk in cosmic haze. What is Quantum Physics. Quantum quiet - physics-math - 04 January 2001. Information encoded in peculiar quantum states is immune to a common type of noise, physicists report. Such protective states could help give the quantum computers of tomorrow enough time to think clearly. In the strange world of quantum mechanics, tiny objects can exist in two different states at the same time.

For example, a magnetic ion can point both up and down at the same time. This makes ions good candidates for "q-bits," the data bits in a quantum computer that can represent 0 and 1 at the same time. Unfortunately, the up-and-down state ordinarily lasts only a fraction of a second before noise from the surrounding environment destroys it. However the information will survive 3.6 times longer if it is encoded in certain more complex quantum states involving a pair of ions, report physicists David Kielpinski, David Wineland and their colleagues at the National Institute of Standards and Technology in Boulder, Colorado. Getting phased The research is published in Science. Quantum mechanics. Quantum mechanics. Description of physical properties at the atomic and subatomic scale Quantum mechanics is a fundamental theory in physics that describes the behavior of nature at and below the scale of atoms.[2]: 1.1 It is the foundation of all quantum physics including quantum chemistry, quantum field theory, quantum technology, and quantum information science.

Classical physics, the collection of theories that existed before the advent of quantum mechanics, describes many aspects of nature at an ordinary (macroscopic) scale, but is not sufficient for describing them at small (atomic and subatomic) scales. Most theories in classical physics can be derived from quantum mechanics as an approximation valid at large (macroscopic) scale.[3] Overview and fundamental concepts Quantum mechanics allows the calculation of properties and behaviour of physical systems.

It is typically applied to microscopic systems: molecules, atoms and sub-atomic particles. Mathematical formulation . And with the usual inner product.