Menu

Blog

Page 9217

Feb 28, 2019

Cooperativity and entanglement pave way for ground-state cooling using nitrogen vacancy centers

Posted by in categories: engineering, nanotechnology, particle physics, quantum physics

Center for Nanoscale Materials researchers present a quantum model for achieving ground-state cooling in low frequency mechanical resonators and show how cooperativity and entanglement are key factors to enhance the cooling figure of merit.

A resonator with near-zero thermal noise has better performance characteristics in nanoscale sensing, quantum memories, and quantum information processing applications. Passive cryogenic cooling techniques, such as dilution refrigerators, have successfully cooled high-frequency resonators but are not sufficient for lower frequency systems. The optomechanical effect has been applied successfully to cool low-frequency systems after an initial cooling stage. This method parametrically couples a mechanical resonator to a driven optical cavity, and, through careful tuning of the drive frequency, achieves the desired cooling effect. The optomechanical effect is expanded to an alternative approach for ground-state cooling based on embedded solid-state defects. Engineering the atom-resonator coupling parameters is proposed, using the strain profile of the mechanical resonator allowing cooling to proceed through the dark entangled states of the two-level system ensemble.

Read more

Feb 28, 2019

The ‘Digit’ robot could be the future of humanoid pizza deliveries

Posted by in categories: futurism, robotics/AI

The Atlas robot has some new bipedal competition.

Read more

Feb 28, 2019

FedEx turns to Segway inventor to build delivery robot

Posted by in categories: business, robotics/AI, transportation

FedEx is the latest company to join the delivery robot craze.

The company said Wednesday it will test a six-wheeled, autonomous robot called the SameDay Bot in Memphis, Tenn. this summer and plans to expand to more cities.

It’s partnering with major brands, including Walmart, Target, Pizza Hut and AutoZone, to understand how delivery robots could help other businesses.

Continue reading “FedEx turns to Segway inventor to build delivery robot” »

Feb 28, 2019

A newly discovered stem cell that keeps bones growing

Posted by in category: biotech/medical

Bone elongation requires the maintenance of a growth plate of cartilage. Two studies have now identified stem cells specific to this structure that give rise to both cartilage cells and bone-marrow stem cells. Identification of a stem cell that promotes the growth of long bones.

Read more

Feb 28, 2019

Researchers develop a fleet of 16 miniature cars for cooperative driving experiments

Posted by in categories: information science, robotics/AI, transportation

A team of researchers at The University of Cambridge has recently introduced a unique experimental testbed that could be used for experiments in cooperative driving. This testbed, presented in a paper pre-published on arXiv, consists of 16 miniature Ackermann-steering vehicles called Cambridge Minicars.

“Using true-scale facilities for vehicle testbeds is expensive and requires a vast amount of space,” Amanda Prorok. “Our main objective was to build a low-cost, multi-vehicle that is easy to maintain and that is easy to use to prototype new algorithms. In particular, we were interested in testing and tangibly demonstrating the benefits of cooperative driving on multi-lane road topographies.”

Continue reading “Researchers develop a fleet of 16 miniature cars for cooperative driving experiments” »

Feb 28, 2019

Progress Towards Using Quantum Computers for Solving Quantum Chemistry and Machine Learning

Posted by in categories: chemistry, information science, quantum physics, robotics/AI

IonQ used its trapped-ion computer and a scalable co-design framework for solving chemistry problems. They applied it to compute the ground-state energy of the water molecule. The robust operation of the trapped ion quantum computer yields energy estimates with errors approaching the chemical accuracy, which is the target threshold necessary for predicting the rates of chemical reaction dynamics.

Quantum chemistry is a promising application where quantum computing might overcome the limitations of known classical algorithms, hampered by an exponential scaling of computational resource requirements. One of the most challenging tasks in quantum chemistry is to determine molecular energies to within chemical accuracy.

At the end of 2018, IonQ announced that they had loaded 79 operating qubits into their trapped ion system and had loaded 160 ions for storage in another test. This new research shows that they are making progress applying their system to useful quantum chemistry problems. They are leveraging the trapped-ions system longer stability to process many steps. The new optimization methods developed for this first major quantum chemistry problem can also be used to solve significant optimization and machine learning problems.

Continue reading “Progress Towards Using Quantum Computers for Solving Quantum Chemistry and Machine Learning” »

Feb 28, 2019

Researchers move closer to practical photonic quantum computing

Posted by in categories: biotech/medical, computing, quantum physics

For the first time, researchers have demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. The ability to measure thousands of instances of quantum correlation is critical for making photon-based quantum computing practical.

In Optica, The Optica l Society’s journal for high impact research, a multi-institutional group of researchers reports the new measurement technique, which is called correlation on spatially-mapped photon-level image (COSPLI). They also developed a way to detect signals from single photons and their correlations in tens of millions of images.

“COSPLI has the potential to become a versatile solution for performing quantum particle measurements in large-scale photonic quantum computers,” said the research team leader Xian-Min Jin, from Shanghai Jiao Tong University, China. “This unique approach would also be useful for quantum simulation, quantum communication, quantum sensing and biomedical imaging.”

Read more

Feb 28, 2019

Hall effect becomes viscous in graphene

Posted by in category: materials

Researchers at The University of Manchester in the UK have discovered that the Hall effect—a phenomenon well known for more than a century—is no longer as universal as it was thought to be.

In the research paper published in Science this week, the group led by Prof Sir Andre Geim and Dr. Denis Bandurin found that the Hall effect can even be signifcantly, if strongly interact with each other giving rise to a viscous flow. The new phenomenon is important at —something that can have important implications for when making electronic or .

Just like molecules in gases and liquids, electrons in solids frequently collide with each other and can thus behave like viscous fluids too. Such electron fluids are ideal to find new behaviours of materials in which are particularly strong. The problem is that most materials are rarely pure enough to allow electrons to enter the viscous regime. This is because they contain many impurities off which electrons can scatter before they have time to interact with each other and organise a viscous flow.

Read more

Feb 28, 2019

Hybrid material may outperform graphene in several applications

Posted by in categories: computing, materials

“A structure comprising a molybdenum disulfide monolayer on an azobenzene substrate could be used to build a highly compactable and malleable quasi-two-dimensional transistor powered by light.”

Journal Publication: https://journals.aps.org/…/abstr…/10.1103/PhysRevB.98.

Read more

Feb 28, 2019

Nanotechnology makes it possible for mice to see in infrared

Posted by in category: nanotechnology

My superpowers are coming.

“Mice with vision enhanced by nanotechnology were able to see infrared light as well as visible light, reports a new study. A single injection of nanoparticles in the mice’s eyes bestowed infrared vision for up to 10 weeks with minimal side effects, allowing them to see infrared light even during the day and with enough specificity to distinguish between different shapes. ”.

Read more