Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: quantum physics – Page 425

Controlling the trajectory of a basketball is relatively straightforward, as it only requires the application of mechanical force and human skill. However, controlling the movement of quantum systems like atoms and electrons poses a much greater challenge. These tiny particles are prone to perturbations that can cause them to deviate from their intended path in unexpected ways. Additionally, movement within the system degrades, known as damping, and noise from environmental factors like temperature further disrupts its trajectory.

To counteract the effects of damping and noise, researchers from Okinawa Institute of Science and Technology (OIST) in Japan have found a way to use artificial intelligence to discover and apply stabilizing pulses of light or voltage with fluctuating intensity to quantum systems. This method was able to successfully cool a micro-mechanical object to its quantum state and control its motion in an optimized way. The research was recently published in the journal Physical Review Research.

Read more | >

The ability to see invisible structures in our bodies, like the inner workings of cells, or the aggregation of proteins, depends on the quality of one’s microscope. Ever since the first optical microscopes were invented in the 17th century, scientists have pushed for new ways to see more things more clearly, at smaller scales and deeper depths.

Randy Bartels, professor in the Department of Electrical Engineering at Colorado State University, is one of those scientists. He and a team of researchers at CSU and Colorado School of Mines are on a quest to invent some of the world’s most powerful light microscopes—ones that can resolve large swaths of biological material in unimaginable detail.

The name of the game is super–resolution microscopy, which is any optical imaging technique that can resolve things smaller than half the wavelength of light. The discipline was the subject of the 2014 Nobel Prize in Chemistry, and Bartels and others are in a race to keep circumventing that to illuminate biologically important structures inside the body.

Read more | >

Researchers may have made a massive breakthrough in quantum computing. According to a new study published in Nature Nanotechnology, researchers may have discovered a cheaper way to push large-scale quantum computers.

Quantum computing is an intriguing field that has seen quite a bit of growth over the past several years. However, there’s still a lot holding back the massive computers that researchers are working with – namely, their size and the sheer amount of control required to keep large-scale quantum computers running smoothly.

That’s because the larger you make a quantum computer, the more quantum bits, or qubits, it requires to run. And the entire idea of a quantum computer requires you to control every single one of those qubits to keep things running smoothly and efficiently. So, when you make large-scale quantum computers, you end up with a lot of processing power and a lot more qubits to control.

Read more | >

With so much death all around us, from the pandemic to the war in Ukraine to all the mass shootings, you might wonder what it all means. Queen Elizabeth gone. Betty White gone. And perhaps even a loved one of yours gone. They no longer exist, right? They are just memories, at least from a rational scientific perspective. But what if you’re wrong?

Dr. Caroline Soames-Watkins also believed that the world around her existed as a hard, cold reality ticking away like a clock. Death was a foregone conclusion—until she learned different. Caro, the protagonist of my new novel co-written with award-winning sci-fi author Nancy Kress, also thought she had the world figured out. Not her personal world, which has been upended by controversy, but how the physical world works and how her consciousness operates within it. Broke and without a job, she accepts a job offer from her great-uncle, a Nobel Prize-winning scientist who runs a research facility studying the space between biology and consciousness—between the self and what we assume is reality. They are on the verge of a humanity-altering discovery, which throws Caro into danger—love, loss, and death—that she could never have imagined possible.

Observer takes Caro on a mind-expanding journey to the very edge of science, challenging her to think about life and the power of the imagination in startling new ways. The ideas behind Observer are based on real science, starting with the famous two-slit experiments, in which the presence of an observer affects the path taken by a sub-atomic particle, and moves step-by-step into cutting-edge science about quantum entanglement, on-going experiments applying quantum-level physics to the macro-world, the multiverse, and the nature of time and consciousness itself.

Read more | >

Year 2012 The dwave quantum computers could essentially host the entire internet with low cost and even photonic room temperature quantum computers could eventually host the internet for even cheaper even down to pennies. Also if starling had casimir energy generators and casimir propulsion systems it could be even free for satellite operation costs with full automation we could essentially have low cost of pennies for the full system operation. At least some ideas for future operation costs.

This question was originally answered by Greg Price on Quora.

Read more | >

One of the most exciting applications of quantum computers will be to direct their gaze inwards, at the very quantum rules that make them tick. Quantum computers can be used to simulate quantum physics itself, and perhaps even explore realms that don’t exist anywhere in nature.

But even in the absence of a fully functional, large-scale quantum computer, physicists can use a quantum system they can easily control to emulate a more complicated or less accessible one. Ultracold atoms—atoms that are cooled to temperatures just a tad above absolute zero—are a leading platform for quantum simulation. These atoms can be controlled with and magnetic fields, and coaxed into performing a quantum dance routine choreographed by an experimenter. It’s also fairly easy to peer into their quantum nature using high-resolution imaging to extract information after—or while—they complete their steps.

Now, researchers at JQI and the NSF Quantum Leap Challenge Institute for Robust Quantum Simulation (RQS), led by former JQI postdoctoral fellow Mingwu Lu and graduate student Graham Reid, have coached their ultracold atoms to do a new dance, adding to the growing toolkit of quantum simulation. In a pair of studies, they’ve bent their atoms out of shape, winding their quantum mechanical spins around in both space and time before tying them off to create a kind of space-time quantum pretzel.

Read more | >

#generalrelativitylecture.

General theory of relativity has got a deep understanding. In this General relativity lecture I have explained, the deep philosophical meaning of General relativity. I have also described from Special relativity when we move to General relativity, the entire notion of spacetime changes and why the mathematics becomes difficult. I have also discussed quantum mechanics and general relativity and its connection to string theory. This is a video, which discusses about the nature of development of the process and some deep philosophies which lies in the heart of spacetime.

00:00 — 01:34 — Objectives.
01:35 — 02:58 — Topics.
02:59 — 05:56 — Understanding a system.
05:57 — 12:51 — Consequence of relativity.
12:52 — 18:33 — General relativity is more geometry.
18:34 — 28:49 — What is a classical system.
28:50 — 31:23 — General relativity and Quantum mechanics.
31:24 — 32:53 — General relativity & String theory.
32:54 — 38:14 — Summary and conclusion.

Welcome to General relativity explained.

This channel is dedicated for teaching Einstein’s General Theory of Relativity. In this channel you will come to know everything about General relativity, its mathematics, online resources, books, pdf documents, YouTube lectures and other resources. For those you are starting to learn relativity, this channel will be extremely useful as well as for those who are already in their graduate and post graduate studies.

Best wishes for your endeavor in this wonderful journey.

Continue reading “General theory of relativity | General relativity explained | General relativity lecture” | >

Physical systems evolve at a particular speed, which depends on various factors including the system’s so-called topological structure (i.e., spatial properties that are preserved over time despite any physical changes that occur). Existing methods for determining the speed at which physical systems change over time, however, do not account for these structural properties.

Two researchers at Keio University in Japan have recently derived a speed limit for the evolution of physical states that also accounts for the topological structure of a system and of its underlying dynamics. This speed limit, outlined in a paper published in Physical Review Letters, could have numerous valuable applications for the study and development of different , including quantum technologies.

“Figuring out how fast a system state can change is a central topic in classical and , which has attracted the great interest of scientists,” Tan Van Vu and Keiji Saito, the researchers who carried out the study, told Phys.org. “Understanding the mechanism of controlling time is relevant to engineering fast devices such as quantum computers.”

Read more | >

Paris-based quantum computing startup PASQAL announced today it has raised €100 million in a Series B funding round, led by a new investor, Singapore-based Temasek. It was joined by the European Innovation Council (EIC) Fund, Wa’ed Ventures and Bpifrance, through its Large Venture Fund and existing investors Quantonation, the Defense Innovation Fund, Daphni and Eni Next. This brings PASQAL’s total funding to date to more than €140 million.

Founded in 2019 as a spin-off from Institut d’Optique, PASQAL develops quantum processors based on ordered neutral atoms in 2D and 3D arrays. Physics Today.

PASQAL’s technology is based on research conducted by the winner of the 2022 Nobel Prize in Physics, and it plans to deliver major commercial advantages over classical computers by 2024.

Read more | >