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Scientists achieve teleportation breakthrough
Japanese researchers carry out quantum teleportation within a diamond.
- Scientists figure out how to teleport information within a diamond.
- The study took advantage of defects in the diamond's structure.
- The achievement has implications for quantum computing.
Scientists from the Yokohama National University in Japan achieved the feat of teleporting quantum information within a diamond. Their study is an important step in the field of quantum information technology.
Hideo Kosaka, a professor of engineering at Yokohama National University, led the study. He explained that the goal was to get data where it doesn't normally go
"Quantum teleportation permits the transfer of quantum information into an otherwise inaccessible space," shared Kosaka. "It also permits the transfer of information into a quantum memory without revealing or destroying the stored quantum information."
The "inaccessible space" explored in the study was the lattice of carbon atoms in a diamond. The strength of the structure stems from the diamond's organization that has six protons and six neutrons in the nucleus, with six spinning electrons around it. As they bond to the diamond, the atoms form a super-strong lattice.
For their experiments, Kosaka and his team focused on defects that sometimes arise in diamonds, when a nitrogen atom appears in vacancies that would ordinarily house carbon atoms.
Kosaka's team manipulated an electron and a carbon isotope in such a vacancy by running a microwave and a radio wave into the diamond via a very thin wire – one fourth the width of a human hair. The wire was attached to the diamond, creating an oscillating magnetic field.
The scientists controlled the microwaves sent to the diamond to transfer information within it. In particular, they employed a nitrogen nano magnet to transfer the polarization state of a photon to a carbon atom, effectively achieving teleportation.
The diamond's lattice structure features a nitrogen-vacancy center with surrounding carbons. In this image, the carbon isotope (green) is initially entangled with an electron (blue) in the vacancy. It then waits for a photon (red) to be absorbed. This results in quantum teleportation-based state transfer of the photon into the carbon memory.
Credit: Yokohama National University
"The success of the photon storage in the other node establishes the entanglement between two adjacent nodes," Kosaka said, adding that their "ultimate goal" was to figure out how to make use of such processes "for large-scale quantum computation and metrology."
The accomplishment could prove vital in the quest for new ways to store and share sensitive information, with previous studies showing diamonds could house giant amounts of encrypted data.
Kosaka's team also included Kazuya Tsurumoto, Ryota Kuroiwa, Hiroki Kano, and Yuhei Sekiguchi.
You can find their study published in Communications Physics.
An Oxford scientist claims a Nobel-Prize-winning conclusion is wrong.
- Paper by Oxford University physicist Subir Sarkar and his colleagues challenges how conclusions about cosmic acceleration and dark energy were reached.
- Physicists who proved cosmic acceleration shared a Nobel Prize.
- Sarkar used statistical analysis to question key data, but his methodology also has detractors.
2011 Nobel Laureates in Physics, Saul Perlmutter, Brian P. Schmidt and Adam G. Riess<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="28ce83ddb06a68f48f7723de30df35de"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/7RDs9qJ-kw0?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>2011 Nobel Laureates in Physics, Perlmutter, Schmidt and Riess, describe how an assumed error turned into the surprise discovery that the universe is expandi...
Lisa Randall: Dark Energy Will Take Over<div class="rm-shortcode" data-media_id="oDcTSObk" data-player_id="FvQKszTI" data-rm-shortcode-id="01b8205e912851fbc31a81335b0b463b"> <div id="botr_oDcTSObk_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/oDcTSObk-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/oDcTSObk-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/oDcTSObk-FvQKszTI.js"></script> </div> <p><em>Physicist Lisa Randall on why dark energy doesn't dilute as the universe expands.</em></p>
Monopolies wield an immense amount of economic and political power and influence. So what can we do to make the economy more equitable?
- According to Vanderbilt law professor and author Ganesh Sitaraman, America has a monopoly problem—a problem that is almost universally acknowledged as such, yet little is done about it.
- Sitaraman explains how monopolies of today share DNA with trusts of the 19th century, and how the increased concentration and consolidation of these corporations translates to increased power both economically and politically.
- "We need to think about reinvigorating our anti-trust laws and the principles of anti-monopoly that gave spirit to those laws and to lots of other regulations," he argues. Restoring faith in government and the economy starts with dismantling the things that make people question its allegiances and priorities.
A new study seeks to understand why the average body temperature is no longer 98.6 degrees Fahrenheit.
- Average human body temperatures have declined, show several studies.
- A new paper looked at an indigenous population in the Amazon over 16 years.
- They found the new body temperature of the observed people to be 97.7°F, not the standard 98.6°F.