Researchers Demonstrate Chip-to-Chip Quantum Teleportation | Physics &#8211; Sci-News.com

A research team led by University of Bristol scientists has successfully demonstrated quantum teleportation of information between two programmable micrometer-scale silicon chips. The team’s work, published in the journal Nature Physics, lays the groundwork for large-scale integrated photonic quantum technologies for communications and computations.

Llewellyn et al realize an array of microring resonators (MRRs) to generate multiple high-quality single photons, which are monolithically integrated with linear-optic circuits that process multiple qubits with high fidelity and low noise. Image credit: Llewellyn et al, doi: 10.1038/s41567-019-0727-x.

Quantum teleportation offers quantum state transfer of a quantum particle from one place to another by utilizing entanglement.

Teleportation is not only useful for quantum communication but is a fundamental building-block of optical quantum computing.

Establishing an entangled communication link between two chips in the lab however has proven to be highly challenging.

“We were able to demonstrate a high-quality entanglement link across two chips in the lab, where photons on either chip share a single quantum state,” said study first author Dr. Dan Llewellyn, a researcher in the Quantum Engineering Technology Labs at the University of Bristol.

“Each chip was then fully programmed to perform a range of demonstrations which utilize the entanglement.”

“The flagship demonstration was a two-chip teleportation experiment, whereby the individual quantum state of a particle is transmitted across the two chips after a quantum measurement is performed.”

“This measurement utilizes the strange behavior of quantum physics, which simultaneously collapses the entanglement link and transfers the particle state to another particle already on the receiver chip.”

“Based on our previous result of on-chip high quality single-photon sources, we have built an even more complex circuit containing four sources,” added study co-author Dr. Imad Faruque, also from the Quantum Engineering Technology Labs at the University of Bristol.

“All of these sources are tested and found to be nearly identical emitting nearly identical photons, which is an essential criterion for the set of experiments we had performed, such as entanglement swapping.”

The results showed extremely high-fidelity quantum teleportation of 91%.

In addition, the team was able to demonstrate some other important functionality of their designs, such as entanglement swapping (required for quantum repeaters and quantum networks) and four-photon GHZ states (required in quantum computing and the quantum internet).

“Low loss, high stability, and excellent controllability are extremely important for integrated quantum photonics,” said study co-author Dr. Yunhong Ding, a researcher in the Department of Photonics Engineering and the Center for Silicon Photonics for Optical Communication at Technical University of Denmark.

“In the future, a single silicon-chip integration of quantum photonic devices and classical electronic controls will open the door for fully chip-based CMOS-compatible quantum communication and information processing networks,” said Dr. Jianwei Wang, a scientist at Peking University and corresponding author of the study.

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D. Llewellyn et al. Chip-to-chip quantum teleportation and multi-photon entanglement in silicon. Nat. Phys, published online December 23, 2019; doi: 10.1038/s41567-019-0727-x

Science

New study suggests icebergs may not have sunk the Titanic eventually – haveeruonline

Published

31 mins ago

September 18, 2020

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="From Popular Mechanics” data-reactid=”32″>From popular mechanics

The new paper has solar flare activity Contribute to sinking of giant.
Sun Emits a huge solar storm It can even cut off power on Earth.
The correct (wrong) type of solar flare may have hindered your navigation. and Radio, affecting giantTrajectory and structure correspondence.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Just when we think we know everything there is to know about the Titanic—unsinkable ship, giant iceberg, "I’m the king of the world," etc.—along comes fascinating new research that raises big questions about what really transpired on the fateful night of April 14, 1912. Did a weather fluke from space actually cause the Titanic to sink?
” data-reactid=”37″>When you think you know everything we need to know giantIt comes with exciting new research that raises big questions about what really happened on the fateful night of April 14, 1912, including an irremovable ship, a huge iceberg, and “I’m the King of the World.” Weather coincidence from space in reality giant Sinking?

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="🚢 You love badass ships. So do we. Let’s nerd out over them together.” data-reactid=”38″>🚢 You like bad belly. We do too. Let’s bother them together.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="The new study's key finding is that the northern hemisphere was in the grips of a “moderate to severe” magnetic storm that night, which could have altered the Titanic’s navigational readings, affecting both its planned course and the information the crew shared about their location during SOS signals.” data-reactid=”43″>The key finding of the new study was that the Northern Hemisphere was in the grip of a “middle to severe” magnetic storm that night. giantExplore readings of affecting all planned courses and Information shared by the crew about their location during the SOS signal.

The idea is very simple. The sun is covered with sunspots, powered by an innate nuclear generator that burns at millions of degrees. These, in turn, are distinguished by massive explosions over the size of the Earth, i.e. solar flares.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="“In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons of TNT,” NASA explains. These flares are often caused by magnetic changes or crashes, and their explosions cause magnetic ripples through the solar system.” data-reactid=”45″>“In just a few minutes, it heats the material to millions of degrees and releases as much energy as billions of megatons of TNT.” NASA explains. These flares are often caused by magnetic changes or collisions, and explosions cause magnetic ripples through the solar system.

It is intuitively understandable that the hottest things in the solar system swirl and experience extreme responses to a changing magnetic field. One of the reasons Earth is a successful habitat for life is that humans have a protective magnetic field that reflects huge amounts of solar radiation and cosmic winds. Otherwise, it will blow us to the surface of a planet like the bald, lifeless Mars.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="This magnetic field also shifts and changes over time, especially as the magnetic poles move around Earth’s surface. Both animals and humans have learned to rely on the magnetic poles, in the form of manmade devices like compasses as well as animals’ sense for migration and navigation. Compasses, like clocks, must be adjusted to the correct units—like accounting for magnetic north as it moves around in a normal way.” data-reactid=”47″>This magnetic field moves and changes over time, especially as the stimulus moves around the Earth’s surface. Both animals and humans have learned to rely on stimuli in the form of artificial devices such as compasses. Animal sense of movement and navigation. A compass like a watch should be adjusted in the correct units as follows: Explain magnetic north It moves in the normal way.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="It’s here that we rejoin the Titanic. Paper author Mila Zinkova has published four previous papers about the Titanic in the journal RMetS Weather, exploring a theory that mirages or other visual distortions played a part in the sinking. Now, Zinkova is using weather and space data to explore a different theory.” data-reactid=”48″>Here we are again giant. Paper author Mila Zinkova said Published 4 previous papers on giant In the journal RMetS Weather, A mirage, or other visual distortion contributed to the sinking. Now Zinkova is exploring other theories using weather and space data.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="If a solar flare is severe enough, marked on that historic night by the telltale Aurora Borealis, it can skew the Earth’s magnetic field and wreak havoc with magnetic instruments like compasses. Even today, solar flares interfere with the electrical grid and space traffic, and truly precious file backups may be kept in protective Faraday cages.” data-reactid=”49″>If the solar flare is severe enough, and marked by Aurora Borealis on that historic night, it can distort the Earth’s magnetic field and cause confusion with magnetic devices like compasses. Even today, solar flares disrupt power grids and space traffic, and prevent valuable file backups. Can be stored in a protective Faraday cage..

Photo courtesy: Paramount-20th Century Fox

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Zinkova posits that the impact on compasses affected the coordinates reported in distress signals. “The Titanic’s Fourth Officer Joseph Boxhall worked out the ship’s SOS position. Boxhall’s position was around 13 nautical miles (24 km) off their real position,” Zinkova writes.” data-reactid=”70″>Zinkova assumes that the effect on the compass affects the coordinates reported in the distress signal. “that much Titanic 4th Joseph Box Hall located the ship’s SOS. Boxhall’s location was about 24 kilometers (13 nautical miles) from its actual location,” wrote Zinkova.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="But the rescue ship Carpathia likely had the same wrong information. “The compasses of the Carpathia could have been under the influence of the geomagnetic storm for 5.5 hours, before and after she received the Titanic’s SOS, and until she reached the lifeboats,” Zinkova continues. “Therefore, a possible combined compass error could have been one of the factors that contributed to the successful rescue of the Titanic survivors.”” data-reactid=”71″>But the rescue ship Carpathian You probably have the exact same misinformation. “Carpathia’s compass may have been affected by a geomagnetic storm. giantUntil she gets to the lifeboat, Zinkova continues. So the possible combined compass error could be one of the factors that contributed to the successful rescue of the Titanic survivors.”

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="This also points to how localized the solar flare phenomenon was. Ships in a certain radius received scrambled radio calls or missed them altogether. Back on land or even outside of the affected radius, everything seemed normal except when trying to contact or be contacted by the Titanic and other ships near it.” data-reactid=”72″>This also indicates how localized the solar flare phenomenon is. Vessels in a certain radius receive scrambled cordless calls or missed them all. Everything seemed normal, even when returning to land or outside the affected radius. giant And other ships nearby.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="You Might Also Like” data-reactid=”73″>You may also like

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Science

Northern municipalities put support behind satellite internet service – ElliotLakeToday.com

Published

6 hours ago

September 18, 2020

The Federation of Northern Ontario Municipalities (FONOM) has cast its attention skyward in joining other Northern Ontario stakeholders calling for better access to high-speed internet.

At its recent board meeting, the municipal advocacy group passed a resolution indicating its support for Starlink, a satellite internet service being developed by SpaceX, the company founded by U.S.-based innovator Elon Musk.

“We know today our citizens require greater connectivity than 50/10 megabits per second,” said FONOM president Danny Whalen in a Sept. 16 news release.

“FONOM believes that the Starlink program is our best option.”

According to a report released by Blue Sky Net earlier this year, the average download speed of participants in a study of northern internet users was just below 9 megabits per second (Mbps) and the average upload speed was just above 5 Mbps.

But for the average user that relies on fast internet speeds for business, education and more, download speeds of 50 Mbps and upload speeds of 10 Mbps are required as the bare minimum to participate in those activities.

In 2018, the federal government’s Canadian Radio-television and Telecommunications Commission (CRTC) set a new target to have 90 per cent of Canadian households with services that deliver download speeds of 50 Mbps and upload speeds of 10 Mbps by 2021. But that goal is still far from being achieved.

Starlink is aiming to deliver high-speed broadband internet, via satellite, to locations where access has been unreliable, expensive, or completely unavailable.

It’s targetting the northern U.S. and Canada for its initial release in 2020, and has plans to reach “near global coverage” in 2021.

The FONOM resolution calls on the CRTC to provide Starlink with a basic international telecommunications licence, which would allow the company to conduct international telecommunications activities.

FONOM said it would also seek support from its partners for the Starlink program.

FONOM, which represents 100 communities in northeastern Ontario, works to better municipal government in Northern Ontario and improve legislation respecting local government in the North.

Science

Venus is a Russian planet — say the Russians – CTV News

Published

7 hours ago

September 18, 2020

No longer confined to territories here on Earth, Russia has now staked its claim on Venus, saying it is a “Russian planet.”

This week, Dmitry Rogozin, head of the Russian space corporation Roscosmos, revealed that the country plans to send its own mission to Venus in addition to “Venera-D,” the planned joint mission with the US, the Russian state news agency TASS reported.

Rogozin was addressing reporters at the HeliRussia 2020 exhibition, an international expo of the helicopter industry in Moscow.

“Resuming Venus exploration is on our agenda,” he told reporters Tuesday.

“We think that Venus is a Russian planet, so we shouldn’t lag behind,” he said.

“Projects of Venus missions are included in the united government program of Russia’s space exploration for 2021-2030.”

The statement came the day after scientists revealed that a gas on Earth called phosphine had also been detected in the atmosphere of Venus.

Venus is similar in size to Earth and is our closest planetary neighbour, but it spins backward compared to other planets.

The study authored by Cardiff University professor Jane Greaves and her colleagues was published Monday in the journal Nature Astronomy.

The discovery of phosphine on Venus elevates it to an area of interest worth exploring in our solar system alongside the ranks of Mars and “water world” moons like Enceladus and Europa, Seager said.

“Our hoped-for impact in the planetary science community is to stimulate more research on Venus itself, research on the possibilities of life in Venus’ atmosphere, and even space missions focused to find signs of life or even life itself in the Venusian atmosphere,” Seager said.

According to the European Space Agency, the Russians do have significant experience when it comes to Venus.

Its website states: “Between 1967-1984 Venusian studies carried out in Russia were at the forefront of international research into this planet.

“Since then, Russia has still preserved its unique expertise in designing and developing landing craft for Venus and continues to define scientific tasks for those craft.”