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Quantum Mechanics

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Batteries, Materials Science, X-ray science, X-ray Scattering and Detection, x-ray diffraction, Light Source, photon sciences

Scientists Watch Quantum Dots 'Breathe' in Response to Stress


Researchers at the Department of Energy’s SLAC National Accelerator Laboratory watched nanoscale semiconductor crystals expand and shrink in response to powerful pulses of laser light. This ultrafast “breathing” provides new insight about how such tiny structures change shape as they start to melt – information that can help guide researchers in tailoring their use for a range of applications.



Quantum Mechanics, retrodiction, future predicts past, Qubit, time, Causality

In the Quantum World, the Future Affects the Past


In the quantum world, the future predicts the past. Playing a guessing game with a superconducting circuit called a qubit, a physicist at Washington University in St. Louis has discovered a way to narrow the odds of correctly guessing the state of a two-state system. By combining information about the qubit's evolution after a target time with information about its evolution up to that time, the lab was able to narrow the odds from 50-50 to 90-10.



Quantum Computing, Nanoscience, Quantum Memories, Cryptography

Nanoscale Mirrored Cavities Amplify, Connect Quantum Memories


Constructing tiny "mirrors" to trap light increases the efficiency with which photons can pick up and transmit information about electronic spin states--which is essential for scaling up quantum memories for functional quantum computing systems and networks.



Vitaly Efimov, Efimov molecules, tri-atomic molecules, Quantum Physics, ultracold experiments

Exotic, Giantic Molecules Fit Inside Each Other Like Russian Nesting Dolls


University of Chicago scientists have experimentally observed for the first time a phenomenon in ultracold, three-atom molecules predicted by Russian theoretical physicsist Vitaly Efimov in 1970.



Technology Transfer, Quantum Dots, Nanotechnology

From the Lab to Your Digital Device, Quantum Dots Have Made Quantum Leaps


Berkeley Lab’s quantum dots have not only found their way into tablets, computer screens, and TVs, they are also used in biological and medical imaging tools, and now Paul Alivisatos’ lab is exploring them for solar cell as well as brain imaging applications.



Qubit, Diamonds, Fluorescence, Quantum Computers, photonic cavity, delta doping, nitrogen vacancy center, Jonathan C. Lee, David O. Bracher, Shanying Cui, Kenichi Ohno, Claire A. McLellan, Xingyu Zhang, Paolo Andrich, Benjamin Alemán, Kasey J. Russell, Andrew P. Magyar, Igor Aharonovich, Ania Bleszynski Jayich, David Awschalom, Evelyn L. Hu, Harvard, University

A Qubit Candidate Shines Brighter


A team of researchers has taken a major step forward in effectively enhancing the fluorescent light emission of diamond nitrogen vacancy centers – a key step to using the atom-sized defects in future quantum computers. The technique, described in the journal Applied Physics Letters hinges on the very precise positioning of NV centers within a structure called a photonic cavity that can boost the light signal from the defect.



Energy, Materials, multiferroics, Advanced Light Source

Switching to Spintronics


Berkeley Lab researchers used an electric field to reverse the magnetization direction in a multiferroic spintronic device at room temperature, a demonstration that points a new way towards spintronics and smaller, faster and cheaper methods of storing and processing data.



Quantum Computers, resistors, current standard, QPS, Nanotechnology, University College London

Nanoscale Resistors for Quantum Devices


Researchers from the London Centre for Nanotechnology have made new compact, high-value resistors for nanoscale quantum circuits. The resistors could speed the development of quantum devices for computing and fundamental physics research.



Physics, Brookhaven National Laboratory, accelerator physics, atom smasher, Collider, RHIC

Infographic: RHIC Cooks Up a Quantum Tempest in a Teacup


When atoms smash inside Brookhaven Lab's Relativistic Heavy Ion Collider (RHIC), they melt and form a friction-free “perfect” liquid. What would happen if you stirred this melted matter inside a teacup?



Quantum Mechanics, parallel worlds, chemical physics, quantum effects , quantum trajectory

New Theory by Texas Tech Scientist Suggests All “Quantum Weirdness” Caused by Interacting Parallel Worlds

A new theory of quantum mechanics was developed by Bill Poirier, a Texas Tech University chemical physicist. The theory discusses parallel worlds' existence and the quantum effects observed in nature.

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