Feature Channels: Quantum Mechanics

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Researchers, led by Columbia Engineering Prof Latha Venkataraman, report today that they have discovered a new chemical design principle for exploiting destructive quantum interference. They used their approach to create a six-nanometer single-molecule switch where the on-state current is more than 10,000 times greater than the off-state current—the largest change in current achieved for a single-molecule circuit to date.

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UPTON, NY—Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory have begun building a quantum-enhanced x-ray microscope at the National Synchrotron Light Source II (NSLS-II). This groundbreaking microscope, supported by the Biological and Environmental Research progam at DOE’s Office of Science, will enable researchers to image biomolecules like never before.

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ORNL's Paul Kent, Dr. Bart Iddins and two teams were recognized for leadership and accomplishment in science, technology and mission support.

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Researchers from MIPT and the RAS Institute of Problems of Chemical Physics have proposed a simple and convenient way to obtain arbitrarily sized quantum dots required for physical experiments via chemical aging

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Large objects behave in accordance with the classical laws of mechanics formulated by Sir Isaac Newton and small ones are governed by quantum mechanics, where an object can behave as both a wave and a particle. The boundary between the classical and quantum realms has always been of great interest. Research reported in AVS Quantum Science, considers the question of what makes something “more quantum” than another -- is there a way to characterize “quantumness”?

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Shantanu Chakrabartty’s laboratory has been working to create sensors that can run on the least amount of energy. His lab has been so successful at building smaller and more efficient sensors, that they’ve run into a roadblock in the form of a fundamental law of physics.Sometimes, however, when you hit what appears to be an impenetrable roadblock, you just have to turn to quantum physics and tunnel through it.

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PNNL, Microsoft Quantum partner to link quantum circuits to powerful government supercomputers

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Physicists from MIPT and Vladimir State University, Russia, have achieved a nearly 90% efficiency converting light energy into surface waves on graphene. They relied on a laser-like energy conversion scheme and collective resonances.

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Scientists developed a platform for making 3-D superconducting nano-architectures with a prescribed organization.

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Fermilab plays a key role in the Quantum Science Center, led by Oak Ridge National Laboratory. The center unites that Oak Ridge's powerhouse capabilities in supercomputing and materials science with Fermilab's world-class high-energy physics instrumentation and measurement expertise and facilities. Drawing on their experience building and operating experiments in cosmology and particle physics and in quantum information science, the Fermilab team is engaging in QSC efforts to develop novel, advanced quantum technologies.

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Researchers from the University of Bristol’s Quantum Engineering Technology Labs (QET Labs) and Université Côte d‘Azur have made a new miniaturized light detector to measure quantum features of light in more detail than ever before. The device, made from two silicon chips working together, was used to measure the unique properties of “squeezed” quantum light at record high speeds.

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Borrowing a page from high-energy physics and astronomy textbooks, a team of physicists and computer scientists at Berkeley Lab has successfully adapted and applied a common error-reduction technique to the field of quantum computing.

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Hexagonal iron sulfide is a type of multiferroic, a versatile material with both magnetic and ferroelectric coupling. New research on this material provides a route to materials with tunable electrical and magnetic behaviors for potential applications in information storage and spintronics computing.

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When it comes to fully understanding the hidden secrets of quantum materials, it takes one to know one, scientists say: Only tools that also operate on quantum principles can get us there. A new Department of Energy research center will focus on developing those tools.

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Researchers at Los Alamos National Laboratory and their collaborators from the University of California, Irvine have created fundamental electronic building blocks out of tiny structures known as quantum dots and used them to assemble functional logic circuits.

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An international multi-institution team of scientists has synthesized graphene nanoribbons – ultrathin strips of carbon atoms – on a titanium dioxide surface using an atomically precise method that removes a barrier for custom-designed carbon nanostructures required for quantum information sciences.

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A phenomenon of quantum mechanics known as superposition can impact timekeeping in high-precision clocks, according to a theoretical study from Dartmouth College, Saint Anselm College and Santa Clara University.

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A new research hub at Perimeter Institute seeks to accelerate discovery in one of the fastest-growing fields in physics, thanks to a $10 million investment from the Riddell Family Charitable Foundation.

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— Sandia National Laboratories Fellow Gil Herrera has been appointed to the newly established U.S. National Quantum Initiative Advisory Committee.

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The precisely controlled photon source, made from an atomically thin semiconducting material, could aid the development of advanced quantum communication

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A team led by the University of Washington reports that carefully constructed stacks of graphene — a 2D form of carbon — can exhibit highly correlated electron properties. The team also found evidence that this type of collective behavior likely relates to the emergence of exotic magnetic states.

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Using a novel technique, scientists working at the Florida State University-headquartered National High Magnetic Field Laboratory have found evidence for a quantum spin liquid, a state of matter that is promising as a building block for the quantum computers of tomorrow.

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A new algorithm that fast forwards simulations could bring greater use ability to current and near-term quantum computers, opening the way for applications to run past strict time limits that hamper many quantum calculations.

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Two new experiments have demonstrated the correlation between natural radiation levels and the duration of qubit coherence. If radiation cannot be mitigated, it will limit the coherence time of qubits to a few milliseconds.

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Scientists at Oak Ridge National Laboratory and the University of Nebraska have developed an easier way to generate electrons for nanoscale imaging and sensing, providing a useful new tool for material science, bioimaging and fundamental quantum research.

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Researchers at Oak Ridge National Laboratory used quantum optics to advance state-of-the-art microscopy and illuminate a path to detecting material properties with greater sensitivity than is possible with traditional tools.

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The world is one step closer to having a totally secure internet and an answer to the growing threat of cyber-attacks, thanks to a team of international scientists who have created a unique prototype which could transform how we communicate online.

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Theory suggests that quantum critical points may be analogous to black holes as places where all sorts of strange phenomena can exist in a quantum material. Now scientists say that they have found strong evidence that QCPs and their associated fluctuations exist in a cuprate superconductor.

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Fermilab has been selected to lead one of five national centers to bring about transformational advances in quantum information science as a part of the U.S. National Quantum Initiative. The initiative provides the new Superconducting Quantum Materials and Systems Center — based at Fermilab and comprising 20 partner institutions — $115 million over five years with the goal of building and deploying a beyond-state-of-the-art quantum computer based on superconducting technologies. The center will also develop new quantum sensors, which could lead to the discovery of the nature of dark matter and other elusive subatomic particles.

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Q-NEXT will bring together nearly 100 world-class researchers from three national laboratories, 10 universities and 10 leading U.S. technology companies with the single goal of developing the science and technology to control and distribute quantum information. These activities, along with a focus on rapid commercialization of new technologies, will support the emerging “quantum economy” and ensure that the U.S. remains at the forefront in this rapidly advancing field.

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The Berkeley Lab-led center will forge the technological solutions needed to harness quantum information science for discoveries that benefit the world. It will also energize the nation’s research community to ensure U.S. leadership in quantum R&D and accelerate the transfer of technologies from the lab to the marketplace.

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The U.S. Department of Energy Office of Science has selected Brookhaven National Laboratory to lead one of five National Quantum Information Science Research Centers. Through hardware-software co-design, the center—called the Co-design Center for Quantum Advantage—will advance quantum computing.

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Radiation from natural sources in the environment can limit the performance of superconducting quantum bits, known as qubits. The discovery, reported in the journal Nature, has implications for the construction and operation of quantum computers.

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Erik Henriksen, assistant professor of physics in Arts & Sciences at Washington University in St. Louis, has been awarded a prestigious Faculty Early Career Development (CAREER) Award by the National Science Foundation. His grant, expected to total $850,000 over the next five years, is for research that explores many-particle interactions in graphene and other single-atom-thick materials.

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Scientists discovered a simple modification that allows quantum systems to stay operational 10,000 times longer than previous systems.

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Graphene, an extremely thin two-dimensional layer of the graphite used in pencils, buckles when cooled while attached to a flat surface, resulting in beautiful pucker patterns that could benefit the search for novel quantum materials and superconductors, according to Rutgers-led research in the journal Nature. Quantum materials host strongly interacting electrons with special properties, such as entangled trajectories, that could provide building blocks for super-fast quantum computers. They also can become superconductors that could slash energy consumption by making power transmission and electronic devices more efficient.

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Building up on their last year’s breakthrough “time reversal” experiment, two researchers from the Moscow Institute of Physics and Technology and Argonne National Laboratory have published a new theoretical study in Communications Physics. While their previous paper dealt with a predefined quantum state, this time the physicists have devised a way to time-reverse the evolution of an object in an arbitrary, unknown state.

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New research at the University of Warwick has (pardon the pun) put a new spin on a mathematical analogy involving a jumping grasshopper and its ideal lawn shape. This work could help us understand the spin states of quantum-entangled particles.

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In its first NSF Engineering Research Center collaboration, NAU will receive nearly $2 million in funding as a CQN contributing partner in the areas of research, education and workforce development.

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New research findings about the origin of structure in the universe could lead to more connections between cosmology and the study of quantum information.

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Using a quantum computer to simulate time travel, researchers have demonstrated that, in the quantum realm, there is no “butterfly effect.” In the research, information—qubits, or quantum bits—“time travel” into the simulated past.

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On Thursday, July 23, Secretary of the U.S. Department of Energy Dan Brouillette will join government, academic, and science leaders at the University of Chicago to unveil a report outlining a blueprint for the construction of a national quantum internet, bringing the U.S. to the forefront of the global quantum race and ushering in a new era of communications.

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The U.S. Department of Energy unveils a report that lays out a blueprint strategy for the development of a national quantum internet, bringing the United States to the forefront of the global quantum race and ushering in a new era of communications. This report provides a pathway to ensure the development of the National Quantum Initiative Act.

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In a press conference today at the University of Chicago, the U.S. Department of Energy (DOE) unveiled a report that lays out a blueprint strategy for the development of a national quantum internet, bringing the United States to the forefront of the global quantum race and ushering in a new era of communications.

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In a press conference today at the University of Chicago, the U.S. Department of Energy (DOE) unveiled a report that lays out a blueprint strategy for the development of a national quantum internet, bringing the United States to the forefront of the global quantum race and ushering in a new era of communications.

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A Cornell University-led collaboration has used state-of-the-art computational tools to model the chaotic behavior of Planckian, or “strange,” metals. This behavior has long intrigued physicists, but they have not been able to simulate it down to the lowest possible temperature until now.

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Scientists are harnessing the mind-bending potential of quantum computers to help us understand genetic diseases – even before quantum computers are a thing. ]

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The project could pave the way for small, mobile quantum networks and possibly lead to unbreakable, secure communication systems, quantum computers and enhanced radar.

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Molecular dynamics is central to many questions in modern chemistry. However, computer models of molecular dynamics must balance computational cost and accuracy. Scientists have now used a machine learning technique called transfer learning to create a novel model of molecular motion that is as accurate as calculations that use quantum-mechanical physics but much faster.

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For the first time, scientists at the Morgridge Institute for Research have generated near atomic resolution images of a major viral protein complex responsible for replicating the RNA genome of a member of the positive-strand RNA viruses.