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Category: quantum physics – Page 879

Apple and Q-Dots.

While we know that Apple’s next display shift will be to OLED for their 2017 Anniversary edition iPhone, Apple is always looking to the next wave technology just on the horizon. So what’s beyond OLED? At the moment, many think the next trend points to Quantum Dot LED or QDLED. While the structure of a QLED is very similar to OLED technology, the difference is that the light emitting centers are cadmium selenide nanocrystals, or quantum dots. Theoretically, the advantages to this type of display is that it could reportedly deliver brighter ‘pure color’ and consumes less power, in fact close to 50% less power. The technology is also ideal for consumer devices that demand a flexible display. When Apple first introduced their vision of an Apple Watch in 2013, they presented it with a ‘continuous’ display that completely wraps around a users wrist as noted in the patent figure below. A QDLED type of display would allow such a form factor to come to market.

2AA 88 CONTINUOUS DISPLAY COMMUNICATION BRACELET

While Quantum Dot based displays are no doubt many years out, Apple is already on record having explored the technology in a string of four patent filings that we covered back in 2014 in a report titled “Quantum Dots Could Take the Retina Display to the Next Level.” Today, another Quantum Dot invention came to light.

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Professor Michelle Simmons of the Univ. of Sydney is an early pioneer of QC and will go down in history as the 1st Mother of Quantum Computing and a person that all (women and men) can look up to and be a true role model for many in tech and science. I hope to continue to make young girls and women everywhere to learn about her and hopefully they (like me) will consider her a role model to follow.

Fields of research: Quantum Physics, Condensed Matter Physics Campus: Kensington Tags: Expanding Knowledge in the Information and Computing Sciences, Expanding Knowledge in the Physical Sciences.

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In approaches using conventional semiconductor materials, scientists typically created qubits in the form of individual electrons. However, this caused dephesing, and the information carriers were difficult to program and read. Now, researchers from the University of Basel, Ruhr University Bochum, and the Universite de Lyon have overcome this problem by using holes — instead of electrons — to create qubits.

A new type of quantum bit | university of basel.

A new Type of Quantum Bit | University of Basel

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Nice paper on QC from the Obama Administration. While reading this paper; I also kept in mind why the US, Europe, Canada, etc. all must accelerate our efforts on QC which is government backed hackers in China, etc. especially since China will have a Quantum Internet and have also accelerated their efforts on QC with their partnership with Australia’s QC efforts which many discoveries on QC has happened.

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A team built a specialized, layered structure with tiny metallic cavities that improves the light conversion efficiency by orders of magnitude.

ncident laser beam (top of the figure) illuminating an array of nanoscale gold resonators on the surface of a quantum well semiconductor

Artist’s rendering of an incident laser beam (top of the figure) illuminating an array of nanoscale gold resonators on the surface of a “quantum well” semiconductor (slab in figure). (A quantum well is a thin layer that can restrict the movement of electrons to that layer.) The incoming laser beam interacts with the array and the quantum wells and is converted into two new laser beams with different wavelengths. Changing the size, shape, and arrangement of the resonators can be used for beam focusing, beam steering, or control of the beam’s angular momentum. (Image: Sandia National Laboratories)

The new concept explained in the studies can open doors for advanced lasers for optical communications and efficient manufacturing. It can also support efforts to miniaturize optical components for high-speed computing, telecommunications, cameras, and quantum computing that will solve computational problems currently intractable by today’s supercomputers.

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Nice article; I do need to mention that more and more screen displays are moving to Q-Dot technology. So, computer graphics is being enriched in multiple ways by Quantum.

Caltech applied scientists have developed a new way to simulate large-scale motion numerically using the mathematics that govern the universe at the quantum level.

The , presented at the International Conference and Exhibition on Computer Graphics & Interactive Techniques (SIGGRAPH), held in Anaheim, California, from July 24–28, allows computers to more accurately simulate vorticity, the spinning motion of a flowing fluid.

A smoke ring, which seems to turn itself inside out endlessly as it floats along, is a complex demonstration of vorticity, and is incredibly difficult to simulate accurately, says Peter Schröder, Shaler Arthur Hanisch Professor of Computer Science and Applied and Computational Mathematics in the Division of Engineering and Applied Science.

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Computers use switches to perform calculations. A complex film with “quantum wells”—regions that allow electron motion in only two dimensions—can be used to make efficient switches for high-speed computers. For the first time, this oxide film exhibited a phenomenon, called resonant tunneling, in which electrons move between quantum wells at a specific voltage. This behavior allowed an extremely large ratio (about 100,000:1) between two states, which can be used in an electronic device as an ON/OFF switch to perform mathematical calculations (Nature Communications, “Resonant tunneling in a quantum oxide superlattice”).

Quantum wells

Efficient control of electron motion can be used to reduce the power requirements of computers. “Quantum wells” (QW) are regions that allow electron motion in only two dimensions. The lines (bottom) in the schematic show the probability of finding electrons in the structure. The structure is a complex oxide (top) with columns (stacked blue dots corresponding to an added element) where the electrons are free to move in only two dimensions. This is a special type of quantum well called a two-dimensional electron gas (2DEG). (Image: Ho Nyung Lee, Oak Ridge National Laboratory)

To meet our exponentially growing need for computing power without a corresponding jump in energy use, scientists need more efficient electronic versions of switches to perform calculations. Efficient switches need materials that switch between well-defined ON/OFF states. The results of this study could lead to a new class of energy-efficient electronics because these materials can ensure the electronic switches are ON or OFF. These electronic switches could lower power consumption in electronics enabling, for example, the development of high-speed supercomputers and cell phones with longer battery life.

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“Another very good test some readers may want to look up… is the Casimir effect, where forces between metal plates in empty space are modified by the presence of virtual particles.” –Gordon Kane

If you ask what the zero-point energy of space itself is, you can sum up all of the quantum fluctuations you can that arise in quantum field theory, and arrive at an absurd answer: 120 orders of magnitude greater than the observed. Yet if you assume that there’s an incredible cancellation and you get exactly zero, that removes the one thing our Universe needs to explain its expansion: dark energy.

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