http://www.sciencedaily.com/news/matter_energy/quantum_computing/ Quantum Computing News. Read the latest about the development of quantum computers. Full-text, images, free. en-us Wed, 25 Nov 2009 21:05:01 EST Wed, 25 Nov 2009 21:05:01 EST 60 http://www.sciencedaily.com/images/logosmall.gif http://www.sciencedaily.com/news/matter_energy/quantum_computing/ For more science articles, visit ScienceDaily. http://www.sciencedaily.com/releases/2009/11/091109121343.htm In an international first, scientists have produced a Bose-Einstein condensate of the alkaline-earth element strontium. Choosing the isotope 84Sr, which has received little attention so far, proved to be the right choice for the breakthrough. It can now be regarded as an ideal candidate for future experiments with atomic two-electron systems. Wed, 25 Nov 2009 05:00:00 EST http://www.sciencedaily.com/releases/2009/11/091109121343.htm http://www.sciencedaily.com/releases/2009/11/091120095005.htm Physicists have made an important advance in electrically controlling quantum states of electrons, a step that could help in the development of quantum computing. Mon, 23 Nov 2009 05:00:00 EST http://www.sciencedaily.com/releases/2009/11/091120095005.htm http://www.sciencedaily.com/releases/2009/11/091118092630.htm Scientists have discovered a method of using nanoparticles to illuminate the cellular interior to reveal the slow, complex processes taking place in a living cell. Sat, 21 Nov 2009 11:00:00 EST http://www.sciencedaily.com/releases/2009/11/091118092630.htm http://www.sciencedaily.com/releases/2009/11/091112121605.htm The performance of modern electronics increases steadily on a fast pace thanks to the ongoing miniaturization of the utilized components. However, severe problems arise due to quantum-mechanical phenomena when conventional structures are simply made smaller and reach the nanometer scale. Therefore current research focuses on the so-called bottom-up approach: the engineering of functional structures with the smallest possible building blocks -- single atoms and molecules. Thu, 19 Nov 2009 05:00:00 EST http://www.sciencedaily.com/releases/2009/11/091112121605.htm http://www.sciencedaily.com/releases/2009/11/091118092628.htm To exploit the quantum world to the fullest, a key commodity is entanglement -- the spooky, distance-defying link that can form between objects such as atoms even when they are completely shielded from one another. Now, physicists have developed a promising new source of entangled photons using quantum dots tweaked with a laser. Wed, 18 Nov 2009 17:00:00 EST http://www.sciencedaily.com/releases/2009/11/091118092628.htm http://www.sciencedaily.com/releases/2009/11/091117133510.htm First, it was the soccer-ball-shaped molecules dubbed buckyballs. Then it was the cylindrically shaped nanotubes. Now, the hottest new material in physics and nanotechnology is graphene: a remarkably flat molecule made of carbon atoms arranged in hexagonal rings much like molecular chicken wire. Wed, 18 Nov 2009 11:00:00 EST http://www.sciencedaily.com/releases/2009/11/091117133510.htm http://www.sciencedaily.com/releases/2009/11/091115134128.htm Physicists have demonstrated the first "universal" programmable quantum information processor able to run any program allowed by quantum mechanics -- the rules governing the submicroscopic world -- using two quantum bits (qubits) of information. The processor could be a module in a future quantum computer, which theoretically could solve some important problems that are intractable today. Mon, 16 Nov 2009 11:00:00 EST http://www.sciencedaily.com/releases/2009/11/091115134128.htm http://www.sciencedaily.com/releases/2009/11/091104140812.htm Physicists have created a quantum gas microscope that can be used to observe single atoms at temperatures so low the particles follow the rules of quantum mechanics, behaving in bizarre ways. The work represents the first time scientists have detected single atoms in a crystalline structure made solely of light, called a Bose Hubbard optical lattice. Thu, 12 Nov 2009 14:00:00 EST http://www.sciencedaily.com/releases/2009/11/091104140812.htm http://www.sciencedaily.com/releases/2009/10/091027132959.htm Researchers are investigating long-distance, mobile optical links imperative for secure quantum communications capabilities in theater. They have conducted high data-rate experiments using an optical laser link, a tool which exploits the quantum noise of light for higher security. Mon, 02 Nov 2009 14:00:00 EST http://www.sciencedaily.com/releases/2009/10/091027132959.htm http://www.sciencedaily.com/releases/2009/10/091027162001.htm Scientists have always attempted to develop spin transistors by incorporating local ferromagnets into device architectures. A far better and practical way to manipulate the orientation of an electron's spin would be by using purely electrical means. Researchers have now found an innovative and novel way to control an electron's spin orientation using purely electrical means. Fri, 30 Oct 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091027162001.htm http://www.sciencedaily.com/releases/2009/10/091019122958.htm Research into monstrous rogue waves points the way to improved long distance optical communication, and could help us understand how giant, destructive waves form at sea. Tue, 27 Oct 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091019122958.htm http://www.sciencedaily.com/releases/2009/07/090729074527.htm Light can be confined to a very small space using a microscopic container surrounded by reflective walls. The light can then be stored by continuous reflections and cannot escape. Physicists in Germany have now for the first time realized a microresonator that combines all the desired properties -- long storage time, small volume, and tunability to arbitrary optical frequencies, in a single monolithic device. Mon, 19 Oct 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090729074527.htm http://www.sciencedaily.com/releases/2009/10/091015133117.htm In the quest for smaller, faster computer chips, researchers are increasingly turning to quantum mechanics -- the exotic physics of the small. The problem: the manufacturing techniques required to make quantum devices have been equally exotic. That is, until now. Sat, 17 Oct 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091015133117.htm http://www.sciencedaily.com/releases/2009/10/091011071349.htm Physicists have made the first definitive measurements of "persistent current," a small but perpetual electric current that flows naturally through tiny rings of metal wire even without an external power source. Mon, 12 Oct 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091011071349.htm http://www.sciencedaily.com/releases/2009/10/091005123050.htm The qubits that carry quantum information are typically fragile, but a new method of combing six photons leads to robust qubits that are immune to many of the effects that threaten to scramble quantum data. Sun, 11 Oct 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091005123050.htm http://www.sciencedaily.com/releases/2009/10/091007153743.htm For the first time, researchers have produced experimental evidence that classical chaos occurs in the quantum world. Thu, 08 Oct 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091007153743.htm http://www.sciencedaily.com/releases/2009/10/091006134825.htm Electrical engineers have proposed a new scheme that can overcome a critical limitation of high-resolution electron microscopes: they cannot be used to image living cells because the electrons destroy the samples. The researchers suggest using a quantum mechanical measurement technique that allows electrons to sense objects remotely without ever hitting the imaged objects, thus avoiding damage. Wed, 07 Oct 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091006134825.htm http://www.sciencedaily.com/releases/2009/09/090929133121.htm Physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing "designer dots" that can be tailored for specific applications. Wed, 30 Sep 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090929133121.htm http://www.sciencedaily.com/releases/2009/09/090923151730.htm Physicists have made an important advance in quantum mechanics, demonstrating that they could detect the quantum correlations in the results of measurements of entangled quantum bits, using a superconducting electrical circuit. Thu, 24 Sep 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090923151730.htm http://www.sciencedaily.com/releases/2009/09/090922100141.htm Physicists in Germany have succeeded for the first time worldwide in producing a Bose-Einstein condensate from the alkaline earth element calcium. The use of alkaline earth atoms creates new potential for precision measurements -- for example, for the determination of gravitational fields. Thu, 24 Sep 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090922100141.htm http://www.sciencedaily.com/releases/2009/09/090922185706.htm Diamonds, it has long been said, are a girl's best friend. But a research team has recently found that the gems might turn out to be a patient's best friend as well. Wed, 23 Sep 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090922185706.htm http://www.sciencedaily.com/releases/2009/09/090922202535.htm A new toolkit of equations will help theorists determine whether a promising agreement between particle physics and string theory is fact or fancy. Wed, 23 Sep 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090922202535.htm http://www.sciencedaily.com/releases/2009/09/090911132308.htm A new way of storing and 'echoing' pulses of light has been discovered by a team from Australia, allowing bursts of laser to work as a flexible optical memory and potentially assist in extending the range of quantum information systems. Mon, 14 Sep 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090911132308.htm http://www.sciencedaily.com/releases/2009/09/090908125139.htm Researchers in Israel have developed thin films that exhibit carrier multiplication. This development is of great interest for future solar cells. The team demonstrated that for a given photon energy, carrier multiplication occurs more efficiently in bulk PbS and PbSe films than in nanocrystalline films of the same materials. Wed, 09 Sep 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090908125139.htm http://www.sciencedaily.com/releases/2009/09/090903163850.htm An Austrian research group has investigated how ultracold quantum gases behave in lower spatial dimensions. They successfully realized an exotic state, where, due to the laws of quantum mechanics, atoms align along a one-dimensional structure. A stable many-body phase with new quantum mechanical states is thereby produced even though the atoms are usually strongly attracted which would cause the system to collapse. Sat, 05 Sep 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090903163850.htm http://www.sciencedaily.com/releases/2009/09/090901132806.htm Scientists using a continent-wide array of radio telescopes have made an extremely precise measurement of the curvature of space caused by the Sun's gravity, and their technique promises a major contribution to a frontier area of basic physics. Wed, 02 Sep 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090901132806.htm http://www.sciencedaily.com/releases/2009/08/090826152723.htm In what may prove to be a major development for scientists in fields ranging from forensics to quantum communications, researchers have developed a new, highly sensitive, low-cost technique for measuring light in the near-infrared range. Tue, 01 Sep 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090826152723.htm http://www.sciencedaily.com/releases/2009/08/090827141338.htm Scientists have shown for the first time that the spectroscopic "fingerprint" of high-temperature superconductivity remains intact well above the super chilly temperatures at which these materials carry current with no resistance. This confirms that certain conditions necessary for superconductivity exist at the warmer temperatures that would make these materials practical for energy-saving applications -- if scientists can figure out how to get the current flowing. Fri, 28 Aug 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090827141338.htm http://www.sciencedaily.com/releases/2009/08/090819083901.htm Electrons that are trapped in very small structures of only a few nanometer, demonstrate fascinating features. These could be useful for novel computers or semiconductor lasers. Researchers have measured for the first time the exact lifetime of excited electrons. Thu, 27 Aug 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090819083901.htm http://www.sciencedaily.com/releases/2009/08/090824115758.htm Scientists are trying to figure out to what extent a new theory of quantum gravity will reproduce general relativity. Wed, 26 Aug 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090824115758.htm http://www.sciencedaily.com/releases/2009/08/090817143556.htm Quantum mechanics and Einstein's theory of general relativity are both extremely accurate theories of how the universe works, but all attempts to combine the two into a unified theory have ended in failure. Now physicists have found a way to carry out a new set of gravity calculations with the help of an older theory that has been around since the 1980s. Fri, 21 Aug 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090817143556.htm http://www.sciencedaily.com/releases/2009/08/090817142847.htm Using tiny crystals called quantum dots, researchers have developed a highly sensitive test to look for DNA attachments that often are early warning signs of cancer. Wed, 19 Aug 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090817142847.htm http://www.sciencedaily.com/releases/2009/08/090811143844.htm Scientists have devised a new type of superconducting circuit that behaves quantum mechanically -- but has up to five levels of energy instead of the usual two. These circuits act like artificial atoms in that they can only gain or lose energy in packets, or quanta, by jumping between discrete energy levels. Thu, 13 Aug 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090811143844.htm http://www.sciencedaily.com/releases/2009/08/090806141508.htm Raising prospects for building a practical quantum computer, physicists have demonstrated sustained, reliable information processing operations on electrically charged atoms (ions). The new work overcomes significant hurdles in scaling up ion-trapping technology from small demonstrations to larger quantum processors. Mon, 10 Aug 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090806141508.htm http://www.sciencedaily.com/releases/2009/08/090807091433.htm Einstein succeeded only partly in explaining the aspects of the universe. Today's scientists are also at a loss about how it all connects. A mathematician in Norway and international fellow scientists have now conceived a grand idea about the universal universe. They have developed a method that may provide answers to universal problems and characterize and describe the universe. Fri, 07 Aug 2009 00:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090807091433.htm http://www.sciencedaily.com/releases/2009/07/090727191923.htm Nanoparticles are being developed to perform a wide range of medical uses -- imaging tumors, carrying drugs, delivering pulses of heat. Rather than settling for just one of these, researchers have combined two nanoparticles in one tiny package. The result is the first structure that creates a multipurpose nanotechnology tool for medical imaging and therapy. Thu, 06 Aug 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090727191923.htm http://www.sciencedaily.com/releases/2009/06/090624111913.htm Researchers have discovered giant Rydberg molecules with a bond as large as a red blood cell. Determining how Rydberg molecules interact is important because Rydberg atoms are a key ingredient in atom based quantum computation schemes. Tue, 04 Aug 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/06/090624111913.htm http://www.sciencedaily.com/releases/2009/07/090730141607.htm Physicists have shown that electrons in narrow wires can divide into two new particles called spinons and a holons. Fri, 31 Jul 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090730141607.htm http://www.sciencedaily.com/releases/2009/07/090720082642.htm Scientists in Brazil report the controllable formation of quantum turbulence in an ultra-cold atom gas. The research makes it easier to characterize quantum turbulence -- and potentially even classical turbulence -- because it is possible to tune many characteristics of the cold-atom gas. Tue, 28 Jul 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090720082642.htm http://www.sciencedaily.com/releases/2009/07/090720080904.htm Scientists have figured out a key step toward the design of quantum information networks. A quantum network – in which memory devices that store quantum states are interconnected with quantum information processing devices – is a prototype for designing a quantum internet. Tue, 28 Jul 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090720080904.htm http://www.sciencedaily.com/releases/2009/07/090722142824.htm In comparison to classical physics, quantum physics predicts that the properties of a quantum mechanical system depend on the measurement context, i.e., whether other system measurements are carried out. Physicists have for the first time proven in a comprehensive experiment that it is not possible to explain quantum phenomena in non-contextual terms. Thu, 23 Jul 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090722142824.htm http://www.sciencedaily.com/releases/2009/07/090716093526.htm An astrophysics experiment in America has demonstrated how fundamental research in one subject area can have a profound effect on work in another as the instruments used for the Laser Interferometer Gravitational-Wave Observatory (LIGO) pave the way for quantum experiments on a macroscopic scale. Sat, 18 Jul 2009 11:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090716093526.htm http://www.sciencedaily.com/releases/2009/07/090715112031.htm In his discussion of accelerated motion on page 60 of "The Meaning of Relativity," Albert Einstein made an approximation that allowed him to develop the theory of relativity further. Einstein apparently never had the opportunity to check his original approximation. Now, a physicist has uncovered some clues about the basis of Einstein's theories and presented a more general approximation, which may better link quantum physics with classical physics. Thu, 16 Jul 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090715112031.htm http://www.sciencedaily.com/releases/2009/07/090709095420.htm Since its discovery a few years ago, graphene has climbed to the top of the heap of new materials poised to transform the electronics and nanotechnology landscape. Now scientists have made the first measurement of a fundamental property of graphene, known as quantum capacitance. This crucial variable should prove invaluable to researchers pushing the existing limits of innovation in microchips, chemical sensing instruments, biosensors, ultracapacitance devices and flexible displays. Wed, 15 Jul 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090709095420.htm http://www.sciencedaily.com/releases/2009/07/090710092522.htm Quantum technologies have become the Holy Grail of the IT industry with research projects springing up all over Europe. Now a major effort is being made to spur development by adopting a coordinated, structured approach. Tue, 14 Jul 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090710092522.htm http://www.sciencedaily.com/releases/2009/07/090709140806.htm An atomic "coin" can display a superposition of heads and tails when it has been thrown. If you leave the decision where a quantum particle should go to a coin like this, you get unusual effects. For the first time, physicists have demonstrated these effects in an experiment with caesium. Mon, 13 Jul 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090709140806.htm http://www.sciencedaily.com/releases/2009/07/090707111753.htm Physicists have overcome a hurdle in quantum computer development, having devised a viable way to manipulate a single "bit" in a quantum processor without disturbing the information stored in its neighbors. The approach, which makes novel use of polarized light to create "effective" magnetic fields, could bring the long-sought computers a step closer to reality. Tue, 07 Jul 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090707111753.htm http://www.sciencedaily.com/releases/2009/07/090706113702.htm String theory has come under fire in recent years. Promises have been made that have not been lived up to. Theoretical physicists have now for the first time used string theory to describe a physical phenomenon -- the quantum-critical state of electrons leading to high-temperature superconductivity. Tue, 07 Jul 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090706113702.htm