Lifeboat Foundation

A group of photonics researchers at Tampere University have introduced a novel method to control a light beam with another beam through a unique plasmonic metasurface in a linear medium at ultra-low power. This simple linear switching method makes nanophotonic devices such as optical computing and communication systems more sustainable, requiring low intensity of light.

All–optical switching is the modulation of signal light due to control light in such a way that it possesses the on/off conversion function. In general, a light beam can be modulated with another intense laser beam in the presence of a nonlinear medium.

The switching method developed by the researchers is fundamentally based on the quantum optical phenomenon known as Enhancement of Index of Refraction (EIR).

When Heroes (now streaming on Peacock!) hit the airwaves in September of 2006, few characters were as immediately beloved as the appropriately named Hiro Nakamura. Granted the ability to manipulate space-time, Hiro could not only slow down, speed up, and stop time, he could also teleport from one place to another. That’s a useful skill if you need to get to a specific point in time and space to fight an evil brain surgeon or prevent the end of the world. It’s also useful if you want to build the quantum internet.

Researchers at QuTech — a collaboration between Delft University of Technology and the Netherlands Organization for Applied Scientific Research — recently took a big step toward making that a reality. For the first time, they succeeded in sending quantum information between non-adjacent qubits on a rudimentary network. Their findings were published in the journal Nature.

While modern computers use bits, zeroes, and ones, to encode information, quantum computers us quantum bits or qubits. A qubit works in much the same way as a bit, except it’s able to hold both a 0 and a 1 at the same time, allowing for faster and more powerful computation. The trouble begins when you want to transmit that information to another location. Quantum computing has a communications problem.

Scientists have created the first “time-crystal” two-body system in an experiment that seems to bend the laws of physics.

It comes after the same team recently witnessed the first interaction of the new phase of matter.

Time crystals were long believed to be impossible because they are made from atoms in never-ending motion. The discovery, published in Nature Communications, shows that not only can time crystals be created, but they have potential to be turned into useful devices.

Observer, backup youthful copy, playing the right piano notes, quantum states oh my.

Dr David Sinclair explain about through his lab experiments, why he thinks there is an observer/backup copy for our youthfulness and what are the possible identities he can think of in this clip.

Continue reading “WHO Is The OBSERVER That Holds The Key For OUR YOUTHFULNESS? | Dr David Sinclair Interview Clips” »

Ars Technica’s Chris Lee has spent a good portion of his adult life playing with lasers, so he’s a big fan of photon-based quantum computing. Even as various forms of physical hardware like superconducting wires and trapped ions made progress, it was possible to find him gushing about an optical quantum computer put together by a Canadian startup called Xanadu. But, in the year since Xanadu described its hardware, companies using that other technology continued to make progress by cutting down error rates, exploring new technologies, and upping the qubit count.

But the advantage of optical quantum computing didn’t go away, and now Xanadu is back with a reminder that it still hasn’t gone away. Thanks to some tweaks to the design it described a year ago, Xanadu is now able to sometimes perform operations with more than 200 qubits. And it has shown that simulating the behavior of just one of those operations on a supercomputer would take 9,000 years, while its optical quantum computer can do them in just a few-dozen milliseconds.

This is an entirely contrived benchmark: Just as Google’s quantum computer did, the quantum computer is just being itself while the supercomputer is trying to simulate it. The news here is more about the potential of Xanadu’s hardware to scale.

Circa 2019

Robust quantum energy storage devices are essential to realize powerful next-generation batteries. Herein, we provide a proof of concept for a loss-free excitonic quantum battery (EQB) by using an open quantum network model that exhibits exchange symmetries linked to its structural topology. By storing electronic excitation energy in a symmetry-protected dark state living in a decoherence-free subspace, one can protect the charged EQB from environment-induced energy losses, thereby making it a promising platform for long-term energy storage. To illustrate the key physical principles and potential functionality of this concept, we consider an open quantum network model of a para-benzene-like structure.

Physicists have just taken an amazing step towards quantum devices that sound like something out of science fiction.

For the first time, isolated groups of particles behaving like bizarre states of matter known as time crystals have been linked into a single, evolving system that could be incredibly useful in quantum computing.

Following the first observation of the interaction between two time crystals, detailed in a paper two years ago, this is the next step towards potentially harnessing time crystals for practical purposes, such as quantum information processing.

As physicists delve deeper into the quantum realm, they are discovering an infinitesimally small world composed of a strange and surprising array of links, knots and winding. Some quantum materials exhibit magnetic whirls called skyrmions—unique configurations described as “subatomic hurricanes.” Others host a form of superconductivity that twists into vortices.

Now, in an article published in Nature a Princeton-led team of physicists has discovered that electrons in quantum matter can link to one another in strange new ways. The work brings together ideas in three areas of science—condensed matter physics, topology, and knot theory —in a new way, raising unexpected questions about the quantum properties of electronic systems.

Topology is the branch of theoretical mathematics that studies geometric properties that can be deformed but not intrinsically changed. Topological quantum states first came to the public’s attention in 2016 when three scientists, including Duncan Haldane, who is Princeton’s Thomas D. Jones Professor of Mathematical Physics and Sherman Fairchild University Professor of Physics, were awarded the Nobel Prize for their theoretical prediction of topology in electronic materials.