Lifeboat Foundation

Nice.

Optica l quantum technologies are based on the interactions of atoms and photons at the single-particle level, and so require sources of single photons that are highly indistinguishable – that is, as identical as possible. Current single-photon sources using semiconductor quantum dots inserted into photonic structures produce photons that are ultrabright but have limited indistinguishability due to charge noise, which results in a fluctuating electric field. Conversely, parametric down conversion sources yield photons that while being highly indistinguishable have very low brightness. Recently, however, scientists at CNRS — Université Paris-Saclay, Marcoussis, France; Université Paris Diderot, Paris, France; University of Queensland, Brisbane, Australia; and Université Grenoble Alpes, CNRS, Institut Néel, Grenoble, France; have developed devices made of quantum dots in electrically-controlled cavities that provide large numbers of highly indistinguishable photons with strongly reduced charge noise that are 20 times brighter than any source of equal quality. The researchers state that by demonstrating efficient generation of a pure single photon with near-unity indistinguishability, their novel approach promises significant advances in optical quantum technology complexity and scalability.

Dr. Pascale Senellart and Phys.org discussed the paper, Near-optimal single-photon sources in the solid state, that she and her colleagues published in Nature Photonics, which reports the design and fabrication of the first optoelectronic devices made of quantum dots in electrically controlled cavities that provide bright source generating near-unity indistinguishability and pure single photons. “The ideal single photon source is a device that produces light pulses, each of them containing exactly one, and no more than one, photon. Moreover, all the photons should be identical in spatial shape, wavelength, polarization, and a spectrum that is the Fourier transform of its temporal profile,” Senellart tells Phys.org. “As a result, to obtain near optimal single photon sources in an optoelectronic device, we had to solve many scientific and technological challenges, leading to an achievement that is the result of more than seven years of research.”

Continue reading “The path to perfection: Quantum dots in electrically-controlled cavities yield bright, nearly identical photons” »

China is getting their new Quantum communications infrastructure being prepped for deployment and adoption. Next month, the Quantum Satellite is launched to enable wireless communication that is secured and can block hacking; and we know what the reverse means for everyone else.

Now, China has unveiled that they have been planning and getting their cities ready for Quantum communications/ network adoption.

China leads the world in quantum communications.

Continue reading “China plans to set up global quantum communications network” »

Change is coming; will you be ready?
I remember many decades ago when folks were trying to learn a new OS that changed businesses, governments/ educational institutions, and households around the world. That OS was called Windows; and hearing the stories as well as watching people try to use a PC and a mouse was interesting then.

Now, the world will again go through a large scale metamorphosis again when more and more QC is evolved and made available over the next 5 to 7 years in the technology mainstream. Change is often necessary and often can be good as well.

You might ask yourself, “What is quantum computing, and how do I get involved?”

Continue reading “Quantum Computing And How You Can Get Involved Now” »

Change is coming; and Microsoft will be there.

With funding from Microsoft, a Purdue research team known as ‘Station Q Purdue’ will research potential methods of quantum computing.

“In order to see if these ideas that (Microsoft) has are realistic, whether they can be experimentally verified and then put to use, (Microsoft) has teamed up with certain experimentalists around the world,” said professor Michael Manfra, the director of Station Q Purdue.

Continue reading “Microsoft gives millions to fund quantum computing research at Purdue” »

The opportunity for intellectual freedom is what drew Anna Ijjas to the Princeton Center for Theoretical Science. As an associate research scholar, Ijjas studies basic questions about the universe’s origin and future. “PCTS provided an environment that encouraged me to question established paradigms and pursue unexplored possibilities,” said Ijjas, who is Princeton’s John A. Wheeler Postdoctoral Fellow in cosmology and astroparticle physics. “Independence and creativity are real values at the center.”

Those values were on display at a conference in May to celebrate the 10th anniversary of the center, which trains early-career researchers and provides a place where theoretical scientists — defined as those who use mathematics to study the natural world — can tackle the biggest questions in science, from the search for dark matter to global climate simulations to theories of quantum gravity.

“The range of topics presented at the PCTS@ten conference demonstrates that we’ve reached the goal we set 10 years ago, which is to develop a new breed of theorists with a much broader view of science than they would normally get from typical postdoctoral training,” said Paul Steinhardt, Princeton’s Albert Einstein Professor in Science and the center’s director since 2007.

Continue reading “A decade of deep thinking: Princeton Center for Theoretical Science celebrates 10 years” »

Technology, meet your future beyond AI & Quantum.

While scientists study the possibilities of storing data in DNA, the web magazine Engadget reports that another group of researchers are looking into the possibility of utilizing living cells for next-generation computing.

The latest studies have developed a method of integrating both analog and digital computing into gene-based circuits. This allowed researchers to convert analog chemical reactions into binary output, or the ones and zeros that regular computers understand.

Continue reading “The future of computing may lie in living cells” »

A black hole may carry “soft hair,” low-energy quantum excitations that release information when the black hole evaporates.

Four decades ago, Stephen Hawking proposed that black holes could destroy information—a conclusion that is incompatible with standard laws of quantum physics. This idea started a controversy known as the “black hole information problem” that even now has not been resolved. A new study by Hawking himself and Malcom Perry, both at the University of Cambridge, and by Andrew Strominger at Harvard University shows that some of the assumptions that led to the information problem might be wrong [1]. Their results do not completely solve the problem, but point to a promising research direction that might lead to its long-awaited solution.

According to Einstein’s general theory of relativity, stationary black holes are completely determined by just three observable parameters: their mass, charge, and angular momentum. Almost none of the information about what fell into the black hole is visible from the outside. Physicist John Wheeler described this idea by saying that “black holes have no hair.”

Since 2001, I have worked, experimented, and researched in parallel tech and bio/medical technology space. I did this because I could see that at some point that these two fields would eventually overlap and eventually merge in many areas. Today, we’re already see the duplicated use of technology in both the medical/ life sciences and the same technology used to advance the technology in general such as Quantum tech, nanotech, etc. Here is another example of this trend.

Sponsored Content by Malvern Instruments Ltd

Introduction

Continue reading “Applications of Nanoparticle Tracking Analysis in Nanomedicine” »

Silicon forms the basis of everything from solar cells to the integrated circuits at the heart of our modern electronic gadgets. However the laser, one of the most ubiquitous of all electronic devices today, has long been one component unable to be successfully replicated in this material. Now researchers have found a way to create microscopically-small lasers directly from silicon, unlocking the possibilities of direct integration of photonics on silicon and taking a significant step towards light-based computers.

Whilst there has been a range of microminiature lasers incorporated directly into silicon over the years, including melding germanium-tin lasers with a silicon substrate and using gallium-arsenide (GaAs) to grow laser nanowires, these methods have involved compromise. With the new method, though, an international team of researchers has integrated sub-wavelength cavities, the basic components of their minuscule lasers, directly onto the silicon itself.

To help achieve this, a team of collaborating scientists from Hong Kong University of Science and Technology, the University of California, Santa Barbara, Sandia National Laboratories and Harvard University, first had to find a way to refine silicon crystal lattices so that their inherent defects were reduced significantly enough to match the smooth properties found in GaAs substrate lasers. They did this by etching nano-patterns directly onto the silicon to confine the defects and ensure the necessary quantum confinement of electrons within quantum dots grown on this template.