Visa International has filed for a cryptocurrency system patent that is meant to replace physical currency. The system, which utilizes both central banks and commercial banks, leverages a private blockchain to improve the payment ecosystem.
The United States Patent and Trademark Office (USPTO) published on Thursday a patent application entitled “digital fiat currency,” filed by Visa International Service Association on Nov. 8, 2019.
The filing is for a fiat-linked cryptocurrency system using “a private permissioned distributed ledger platform.” It describes a central computer, its responsibilities, and key roles of the system: central entities, validating entities, redeeming entities, and users. “A central entity may be a central bank, which regulates a monetary supply,” the document details. Validating entities “are blockchain nodes, which may be peers such as banks.” Redeeming entities “may accept physical currency for exchange for digital fiat currency,” such as an ATM or a bank branch location.
Quantum entanglement is a process by which microscopic objects like electrons or atoms lose their individuality to become better coordinated with each other. Entanglement is at the heart of quantum technologies that promise large advances in computing, communications and sensing, for example, detecting gravitational waves.
Entangled states are famously fragile: In most cases, even a tiny disturbance will undo the entanglement. For this reason, current quantum technologies take great pains to isolate the microscopic systems they work with, and typically operate at temperatures close to absolute zero. The ICFO team, in contrast, heated a collection of atoms to 450 Kelvin in a recent experiment, millions of times hotter than most atoms used for quantum technology. Moreover, the individual atoms were anything but isolated; they collided with each other every few microseconds, and each collision set their electrons spinning in random directions.
The researchers used a laser to monitor the magnetization of this hot, chaotic gas. The magnetization is caused by the spinning electrons in the atoms, and provides a way to study the effect of the collisions and to detect entanglement. What the researchers observed was an enormous number of entangled atoms—about 100 times more than ever before observed. They also saw that the entanglement is non-local—it involves atoms that are not close to each other. Between any two entangled atoms there are thousands of other atoms, many of which are entangled with still other atoms, in a giant, hot and messy entangled state.
Quantum entanglement is a process by which microscopic objects like electrons or atoms lose their individuality to become better coordinated with each other. Entanglement is at the heart of quantum technologies that promise large advances in computing, communications and sensing, for example detecting gravitational waves.
Entangled states are famously fragile: in most cases even a tiny disturbance will undo the entanglement. For this reason, current quantum technologies take great pains to isolate the microscopic systems they work with, and typically operate at temperatures close to absolute zero. The ICFO team, in contrast, heated a collection of atoms to 450 Kelvin, millions of times hotter than most atoms used for quantum technology. Moreover, the individual atoms were anything but isolated; they collided with each other every few microseconds, and each collision set their electrons spinning in random directions.
The researchers used a laser to monitor the magnetization of this hot, chaotic gas. The magnetization is caused by the spinning electrons in the atoms, and provides a way to study the effect of the collisions and to detect entanglement. What the researchers observed was an enormous number of entangled atoms — about 100 times more than ever before observed. They also saw that the entanglement is non-local — it involves atoms that are not close to each other. Between any two entangled atoms there are thousands of other atoms, many of which are entangled with still other atoms, in a giant, hot and messy entangled state.
For fun, Apple software developer, Forrest Heller, pits a USB-C charger chip against the computer that landed astronauts on the moon. Here’s what he found.
Quantum technology is currently one of the most active fields of research worldwide. It takes advantage of the special properties of quantum mechanical states of atoms, light, or nanostructures to develop, for example, novel sensors for medicine and navigation, networks for information processing and powerful simulators for materials sciences. Generating these quantum states normally requires a strong interaction between the systems involved, such as between several atoms or nanostructures.
Until now, however, sufficiently strong interactions were limited to short distances. Typically, two systems had to be placed close to each other on the same chip at low temperatures or in the same vacuum chamber, where they interact via electrostatic or magnetostatic forces. Coupling them across larger distances, however, is required for many applications such as quantum networks or certain types of sensors.
A team of physicists, led by Professor Philipp Treutlein from the Department of Physics at the University of Basel and the Swiss Nanoscience Institute (SNI), has now succeeded for the first time in creating strong coupling between two systems over a greater distance across a room temperature environment. In their experiment, the researchers used laser light to couple the vibrations of a 100 nanometer thin membrane to the motion of the spin of atoms over a distance of one meter. As a result, each vibration of the membrane sets the spin of the atoms in motion and vice versa.
The weird world of quantum physics is being harnessed for some fascinating use cases. In the latest example, physicists have developed and demonstrated a “quantum radar” prototype that uses the quantum entanglement phenomenon to detect objects, a system which could eventually outperform conventional radar in some circumstances.
Quantum entanglement describes the bizarre state where two particles can become linked so tightly that they seem to communicate instantly, no matter how far apart they are. Measuring the state of one particle will instantly change the state of the other, hypothetically even if it’s on the other side of the universe. That implies that the information is moving faster than the speed of light, which is thought to be impossible – and yet, it’s clearly and measurably happening. The phenomenon even unnerved Einstein himself, who famously described it as “spooky action at a distance.”
While we still don’t entirely understand why or how it works, that’s not stopping scientists figuring out ways to use it to our advantage. Strides are being made towards creating quantum computers and a quantum internet, both of which would be super fast and nigh-unhackable. And now, in a new study by physicists at the Institute of Science and Technology Austria (IST Austria), MIT and the University of York, the phenomenon been applied to radar.
Linking multiple copies of these devices may lay the foundation for quantum computing.
Once unimaginable, transistors consisting only of several- atom clusters or even single atoms promise to become the building blocks of a new generation of computers with unparalleled memory and processing power. But to realize the full potential of these tiny transistors — miniature electrical on-off switches — researchers must find a way to make many copies of these notoriously difficult-to-fabricate components.
Now, researchers at the National Institute of Standards and Technology (NIST) and their colleagues at the University of Maryland have developed a step-by-step recipe to produce the atomic-scale devices. Using these instructions, the NIST-led team has become only the second in the world to construct a single-atom transistor and the first to fabricate a series of single electron transistors with atom-scale control over the devices’ geometry.
The U.S. space agency National Aeronautics Space Administration (NASA), European Space Agency (ESA), and Japan Aerospace Exploration Agency (JAXA) are inviting coders, entrepreneurs, scientists, designers, storytellers, makers, builders, artists, and technologists to participate in a virtual hackathon May 30–31 dedicated to putting open data to work in developing solutions to issues related to the COVID-19 pandemic.
During the global Space Apps COVID-19 Challenge, participants from around the world will create virtual teams that – during a 48-hour period – will use Earth observation data to propose solutions to COVID-19-related challenges ranging from studying the coronavirus that causes COVID-19 and its spread to the impact the disease is having on the Earth system. Registration for this challenge opens in mid-May.
“There’s a tremendous need for our collective ingenuity right now,” said Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate. “I can’t imagine a more worthy focus than COVID-19 on which to direct the energy and enthusiasm from around the world with the Space Apps Challenge that always generates such amazing solutions.”
The unique capabilities of NASA and its partner space agencies in the areas of science and technology enable them to lend a hand during this global crisis. Since the start of the global outbreak, Earth science specialists from each agency have been exploring ways to use unique Earth observation data to aid understanding of the interplay of the Earth system – on global to local scales – with aspects of the COVID-19 outbreak, including, potentially, our ability to combat it. The hackathon will also examine the human and economic response to the virus.
ESA will contribute data from the Sentinel missions (Sentinel-1, Sentinel-2 and Sentinel-5P) in the context of the European Copernicus program, led by the European Commission, along with data from Third Party contributing Missions, with a focus on assessing the impact on climate change and greenhouse gases, as well as impacts on the economic sector. ESA also is contributing Earth observation experts for the selection of the competition winners and the artificial-intelligence-powered EuroDataCube.
“EuroDatacube will enable the best ideas to be scaled up to a global level,” said Josef Aschbacher, director of Earth Observation Programmes at ESA. “The pandemic crisis has a worldwide impact, therefore international cooperation and sharing of data and expertise with partners like NASA and JAXA seems the most suitable approach.”
JAXA is making Earth observing data available from its satellite missions, including ALOS-2, GOSAT, GOSAT-2, GCOM-C, GCOM-W, and GPM/DPR. “JAXA welcomes the opportunity to be part of the hackathon,” said JAXA Vice President Terada Koji. “I believe the trilateral cooperation among ESA, NASA and JAXA is important to demonstrate how Earth observation can support global efforts in combating this unprecedented challenge.“ Space Apps is an international hackathon that takes place in cities around the world. Since 2012, teams have engaged with NASA’s free and open data to address real-world problems on Earth and in space. The COVID-19 Challenge will be the program’s first global virtual hackathon. Space Apps 2019 included more than 29,000 participants at 225 events in 71 countries, developing more than 2,000 hackathon solutions over the course of one weekend.
Philippine developers used NASA’s free and open data to solve real-world problems on Earth and space.
Many Filipinos participated in this annual hackathon since 2016. Recently, a dengue mapping forecasting system was developed by data scientists from CirroLytix using satellite and climate data with the goal of addressing the sustainable development goals of the United Nations. This web application, called Project AEDES won globally for the best use of data. “Earth observation data has the potential to be used in fighting epidemics and outbreaks threatening humanity nowadays, as well as to analyze its socio-economic impact,” according to software developer Michael Lance M. Domagas, who led the Philippine hackathon in collaboration with De La Salle University, PLDT, Department of Science and Technology, United Nations Development Programme, and the U.S. embassy. The very first Philippine winner used citizen science and environmental data to develop a smartphone application informing fishermen the right time to catch fish. ISDApp is currently being incubated at Animo Labs.
Space Apps is a NASA-led initiative organized globally in collaboration with Booz Allen Hamilton, Mindgrub and SecondMuse. The next annual Space Apps Challenge is scheduled for October 2–4.
In this article I will introduce the basic linear algebra you will need to understand quantum computing. We will only use NumPy in this article, and you’ll get an intro at the end to some interactive Jupyter notebooks, so you don’t need to download anything or learn terminal to get started. All you need is a web browser. If you want you can download the notebooks and run them locally.
