Physicists successfully carry out controlled transport of stored light

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Physicists successfully carry out controlled transport of stored light
For the experiment, atoms of rubidium-87 are first pre-cooled and then transported to the main test area, which is a custom-made vacuum chamber. There they are cooled to temperatures of just a few microkelvins. Credit: Windpassinger group

A team of physicists led by Professor Patrick Windpassinger at Johannes Gutenberg University Mainz (JGU) has successfully transported light stored in a quantum memory over a distance of 1.2 millimeters. They have demonstrated that the controlled transport process and its dynamics has only little impact on the properties of the stored light. The researchers used ultra-cold rubidium-87 atoms as a storage medium for the light as to achieve a high level of storage efficiency and a long lifetime.


“We stored the light by putting it in a suitcase so to speak, only that in our case the suitcase was made of a cloud of cold atoms. We moved this suitcase over a short distance and then took the light out again. This is very interesting not only for physics in general, but also for quantum communication, because light is not very easy to ‘capture’, and if you want to transport it elsewhere in a controlled manner, it usually ends up being lost,” said Professor Patrick Windpassinger, explaining the complicated process.

The controlled manipulation and storage of quantum information as well as the ability to retrieve it are essential prerequisites for achieving advances in quantum communication and for performing corresponding computer operations in the quantum world. Optical quantum memories, which allow for the storage and on-demand retrieval of quantum information carried by light, are essential for scalable quantum communication networks. For instance, they can represent important building blocks of quantum repeaters or tools in linear quantum computing. In recent years, ensembles of atoms have proven to be media well suited for storing and retrieving

Did COVID-19 steal your sales? This is how 9 Latin American startups successfully entered e-commerce

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5 min read

This article was translated from our Spanish edition using AI technologies. Errors may exist due to this process.

Opinions expressed by Entrepreneur contributors are their own.


Technological innovation and process optimization are booming. Changes and restrictions in physical interaction since the pandemic have forced companies to change the way they operate and do business, the recent McKinsey & Company survey “What 800 executives envision for the postpandemic workface ” conducted of executives of companies around the world, shows that a third of companies have accelerated the digitization of their supply chains, half have accelerated the digitization of their customer service channels, and two-thirds have more quickly adopted artificial intelligence and automation.

Undoubtedly, the pandemic has shown us that the digitization of companies of any size is necessary and that being prepared and being able to adapt quickly is essential. There has been an important evolution in consumer habits and in the adoption of purchasing through digital media, as mentioned in the eMarketer report, Latin America Ecommerce 2020 ( How COVID-19 will affect growth and sales in Argentina , Brazil and Mexico ), the region will have 191.7 million digital buyers and more than 10.8 million consumers will make a digital purchase for the first time this year.

In the region there are startups that are helping this entire process, standing out for presenting relevant innovations for sales processes, for promoting the digital transformation of companies through disruptive solutions that help them automate logistics and delivery processes, to increase productivity, for promoting customer loyalty and for allowing correct decision-making with the use of Big Data .

Here are some examples of these solutions, and the name of the startups that lead these changes, promoted by and belonging to Wayra , the Venture Capital of Telefónica

Flood barrier successfully protects Venice from high tide

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VENICE, Italy (Reuters) – A long-delayed flood barrier system successfully protected Venice from a high tide for the first time on Saturday, bringing big relief to the lagoon city after years of repeated inundations.



a large ship in a body of water: Mose flood barrier scheme is used for the first time, in Venice


© Reuters/MANUEL SILVESTRI
Mose flood barrier scheme is used for the first time, in Venice



a large ship in a body of water: Mose flood barrier scheme is used for the first time, in Venicece


© Reuters/MANUEL SILVESTRI
Mose flood barrier scheme is used for the first time, in Venicece

“Today, everything is dry,” mayor Luigi Brugnaro said on Twitter. “Pride and joy.”

The network of 78 bright yellow barriers that guard the entrance to the delicate Venetian lagoon lifted from the sea bed as the tide, driven by strong winds and rain, started to climb.

City officials had forecast a tide of 130 cm (4.27 ft), well below the devastating the 187 cm tide that battered Venice last November, but enough to leave low-lying areas deep under water.



a ship in a body of water: Mose flood barrier scheme is used for the first time, in Venice


© Reuters/MANUEL SILVESTRI
Mose flood barrier scheme is used for the first time, in Venice

However, when the expected peak came shortly after midday, the famed St. Marks Square, one of the first places in Venice to flood, remained largely dry.

The multi-billion-euro flood defence system, known as Mose, was due to come into service in 2011, but the project was plagued by corruption, cost overruns and prolonged delays.

It was finally tested in July and engineers deemed it was ready to use in bad weather.

Venice’s floods, “acqua alta” (high water) in Italian, are caused by a combination of factors exacerbated by climate change – from rising sea levels and unusually high tides to land subsidence that has caused the ground level of the city to sink.

Mose is designed to protect Venice from tides of up to 3 metres, well beyond current records, but some experts worry it will be overwhelmed by the sort of

Toyota-Backed Startup Successfully Tests Manned Electric Flying Car, Plans Launch By 2023

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KEY POINTS

  • Tokyo-based SkyDrive successfully tests flying car
  • Startup claims its prototype is the smallest flying car
  • The vehicle may be commercially available in 2023

A Toyota-backed Japanese startup has said it successfully tested a manned flying car prototype, crossing a major milestone in the race to a trillion dollar futuristic industry that could transform urban transport. SkyDrive expects to market its flying car in Japan in 2023.

The company said its prototype is the smallest electric flying car. About 6.5 feet tall and 13 feet wide, the SD-03 prototype is a little bigger than a standard sedan. It can carry up to 500 kilograms and travel up to 60 kilometers/hour.

It hovered in an enclosed field in Japan before landing safely, the company said. It runs on electric motors that charge four pairs of rotors, lights and other parts.

SkyDrive chief technology officer Nobuo Kishi said the vehicle will be introduced commercially in 2023.

“I would like to help take the industry forward by introducing a lean development process while ensuring the same degree of safety as conventional aircraft, implementing advanced components, and employing innovative mass production processes learned from various industrial sectors,” Kishi said.

The company conducted unmanned tests on the vehicle in December 2018, December 2019 and March 2020. This was the first manned test.

SkyDrive, a 2-year-old startup based in Tokyo, raised $37 million in a Series B funding round on Sept. 1 led by investors like Sumitomo Mitsui and Development Bank of Japan, bringing its total funding since inception to $55 million.

SkyDrive joins other niche startups and major auto players invested in the future of urban mobility. Alibaba-backed Chinese startup Xpeng unveiled its electric flying car concept at the Beijing Auto Show on Saturday. Hangzhou-based Geely Automobile Group launched X-Chimera 25, an all-electric flying

Technology Articles – How to Write Technology Articles Successfully

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Technology articles (or technical articles are they are sometime known) are defined as articles that describe a procedure, give instructions or relay information about a technical product. This can include cell – phones, internet software, computers, mp3 players, DVDs, Blue ray and so on. Anyone who sells such devices online can benefit from posting technology articles to drive traffic to their website. Standard technology articles are available online for free or there are article- writing services available that will customise the technology article you require for your product. If you feel that you can write your own technology article then here are some tips to increase its quality-

1. Understand the technology. If you selling a cell-phone, for example- you need to know more than how to turn it on. You’ll want to invest time in getting to know all the key benefits of this product, what it can do and why it’s worth buying. The more information you know, the easier it will be to word it in your own unique writing style. Plus, when you know all your facts, the reader will trust that you genuinely know the product and assume that they finding out about something worthwhile.

2. Find out what’s hot and what’s not. People who are searching for technology articles or products online will mostly want information on the latest technologies. Talking about video players might not be the best idea in this respect. Keep yourself updated on what is newly available on the market and if possible give the reader new and exciting information on up and coming technology.

3. Use catchy titles. Technology can be boring to the average person plus there is so much technology available online now that it’s hard for the reader to know what to click on first. You …