The 3 Types of Quantum Computers and Their Applications
It’s an exciting time in computing.
Just days ago, Google’s AlphaGo AI took an insurmountable lead in the 3,000 year-old game of Go against the reigning world champion, Lee Sedol. In a five-game series, the score is now 3-1 for the machine with one game left on March 15, 2016 in Seoul, South Korea.
While IBM’s Deep Blue beat reigning chess champion Garry Kasparov in 1997 by using brute force, Go is a game with more possible moves than atoms in the known universe (literally). Therefore, the technology doesn’t yet exist to make such calculations in short amounts of time.
Google had to take a different approach: to beat the grand master, it needed to enable AlphaGo to self-improve through deep learning.
AlphaGo’s historical decision is a milestone for artificial intelligence, and now the technology community is anxiously waiting to see what’s next for AI. Some say that it is beating a human world champion at a real-time strategy game such as Starcraft, while others look to quantum computing – technology that could raise the potential power of AI exponentially.
What is Quantum Computing?
While everyday analog computing is limited to having a single value of either 0 or 1 for each bit, quantum computing uses quantum bits (qubits) that are simultaneously in both states (0 and 1) at the same time.
The consequence of this superposition, as it’s called, is that quantum computers are able to test every solution of a problem at once. Further, because of this exponential relationship, such computers should be able to double their quantum computing power with each additional qubit.
Image credit: Universe Review
Types of Quantum Computers
There are three types of quantum computers that are considered to be possible by IBM. Shown in the above infographic, they range from a quantum annealer to a universal quantum.
The quantum annealer has been successfully developed by Canadian company D-Wave, but it is difficult to tell whether it actually has any real “quantumness” thus far. Google added credibility to this notion in December 2015, when it revealed tests showing that its D-Wave quantum computer was 3,600 times faster than a supercomputer at solving specific, complex problems.
Expert opinion, however, is still skeptical on these claims. Such criticisms also shed light on the major limitation of quantum annealers, which is that they may only be engineered to solve very specific optimization problems, and have limited general practicality.
The holy grail of quantum computing is the universal quantum, which could allow for exponentially faster calculations with more generality.
However, building such a device ends up posing a number of important technical challenges. Quantum particles turn out to be quite fickle, and the smallest interference from light or sound can create errors in the computing process.
Doing calculations at exponential speeds is not very useful when those calculations are incorrect.
The Market and Applications
IBM highlights just some of the possibilities around universal quantum computers in a recent press release:
A universal quantum computer uses quantum mechanics to process massive amounts of data and perform computations in powerful new ways not possible with today’s conventional computers. This type of leap forward in computing could one day shorten the time to discovery for life-saving cancer drugs to a fraction of what it is today; unlock new facets of artificial intelligence by vastly accelerating machine learning; or safeguard cloud computing systems to be impregnable from cyber-attack.
This means that quantum computing could be a trillion dollar market, touching massive future markets such as artificial intelligence, robotics, defense, cryptography, and pharmaceuticals.
However, until a universal quantum can be built, the market remains fairly limited in size and focused on R&D. Quantum computing is expected to surpass a market of $5 billion market by 2020.
As a final note: its worth seeing where quantum computing sits on Gartner’s emerging technology hype cycle:
Gartner still describes it as being “10 years or more” away from reaching the plateau.
Ranked: The Top 50 Most Visited Websites in the World
In this visualization, we rank the top 50 websites that receive the most internet traffic, from Google to CNN.
Ranked: The Top 50 Most Visited Websites in the World
Estimates vary, but there are upwards of two billion websites in existence in 2023.
If we were to rank all of these websites according to their traffic numbers, we would see a classic power law distribution. At the low end, the vast majority of these websites would be inactive, receiving little to no traffic. On the upper end of the ranking though, a handful of websites receive the lion’s share of internet traffic.
This visualization, using data from SimilarWeb, takes a look at the 50 websites that currently sit at the top of the ranking.
Which Websites Get the Most Traffic?
Topping the list of most-visited websites in the world is, of course, Google. With over 3.5 billion searches per day, Google has cemented its position as the go-to source for information on the internet. But Google’s dominance doesn’t stop there. The company also owns YouTube, the second-most popular website in the world. Together, Google and YouTube have more traffic than the next 48 websites combined.
The power of YouTube, in particular, is sometimes not fully understood. The video platform is the second largest search engine in the world after Google. As well, YouTube has the second highest duration-of-visit numbers in this top 50 ranking. (First place goes to the Chinese video sharing website, Bilibili.)
But Google and YouTube aren’t the only big players on the internet. Other websites in the top 50 ranking include social media giants Facebook, Instagram, and TikTok. In particular, TikTok has seen a surge in popularity in recent years and is now one of the most popular social media platforms in the world.
Here’s the full top 50 ranking table form:
|#1||google.com||85.1B||Search Engines||🇺🇸 U.S.|
|#2||youtube.com||33.0B||Streaming & Online TV||🇺🇸 U.S.|
|#3||facebook.com||17.8B||Social Media Networks||🇺🇸 U.S.|
|#4||twitter.com||6.8B||Social Media Networks||🇺🇸 U.S.|
|#5||instagram.com||6.1B||Social Media Networks||🇺🇸 U.S.|
|#6||baidu.com||5.0B||Search Engines||🇨🇳 China|
|#7||wikipedia.org||4.8B||Dictionaries & Encyclopedias||🇺🇸 U.S.|
|#8||yandex.ru||3.4B||Search Engines||🇷🇺 Russia|
|#9||yahoo.com||3.3B||News & Media Publishers||🇺🇸 U.S.|
|#10||whatsapp.com||2.9B||Social Media Networks||🇺🇸 U.S.|
|#16||yahoo.co.jp||2.1B||News & Media Publishers||🇯🇵 Japan|
|#17||netflix.com||2.0B||Streaming & Online TV||🇺🇸 U.S.|
|#18||tiktok.com||1.8B||Social Media Networks||🇨🇳 China|
|#20||reddit.com||1.7B||Social Media Networks||🇺🇸 U.S.|
|#21||office.com||1.6B||Prog. & Developer Software||🇺🇸 U.S.|
|#22||linkedin.com||1.6B||Social Media Networks||🇺🇸 U.S.|
|#23||dzen.ru||1.4B||Faith & Beliefs||🇷🇺 Russia|
|#24||samsung.com||1.4B||Consumer Electronics||🇰🇷 S. Korea|
|#25||vk.com||1.4B||Social Media Networks||🇷🇺 Russia|
|#27||turbopages.org||1.3B||News & Media Publishers||🇷🇺 Russia|
|#29||naver.com||1.2B||News & Media Publishers||🇰🇷 S. Korea|
|#30||bing.com||1.2B||Search Engines||🇺🇸 U.S.|
|#31||microsoftonline.com||1.1B||Prog. & Developer Software||🇺🇸 U.S.|
|#32||discord.com||1.1B||Social Media Networks||🇺🇸 U.S.|
|#33||twitch.tv||1.1B||Gaming & Accessories||🇺🇸 U.S.|
|#34||bilibili.com||1.0B||Animations & Comics||🇨🇳 China|
|#35||pinterest.com||1.0B||Social Media Networks||🇺🇸 U.S.|
|#36||zoom.us||985.9M||Computers Electronics & Tech||🇺🇸 U.S.|
|#38||qq.com||907.1M||News & Media Publishers||🇨🇳 China|
|#39||microsoft.com||902.3M||Prog. & Developer Software||🇺🇸 U.S.|
|#40||msn.com||870.8M||News & Media Publishers||🇺🇸 U.S.|
|#41||globo.com||840.1M||News & Media Publishers||🇧🇷 Brazil|
|#42||duckduckgo.com||839.0M||Search Engines||🇺🇸 U.S.|
|#43||roblox.com||795.7M||Gaming & Accessories||🇺🇸 U.S.|
|#44||quora.com||775.9M||Dictionaries & Encyclopedias||🇺🇸 U.S.|
|#45||news.yahoo.co.jp||749.1M||News & Media Publishers||🇯🇵 Japan|
|#47||aajtak.in||724.1M||News & Media Publishers||🇮🇳 India|
|#48||nytimes.com||702.2M||News & Media Publishers||🇺🇸 U.S.|
|#50||cnn.com||684.9M||News & Media Publishers||🇺🇸 U.S.|
Notable companies that have fallen out of the top 50 since our last version of this visualization are Walmart and PayPal. Notable entrants into the top 50 are Samsung and the New York Times.
The Geography of the 50 Most-Visited Websites
The United States is still home base for many of the world’s biggest websites, taking up 30 spots on this ranking. Of these 30 websites, half are operated by Big Tech companies such as Microsoft, Amazon, Alphabet, Meta, and Netflix.
Russia, China, Japan, and South Korea round out the top five.
Things get interesting in the “other” category, which includes six websites. Two spots are taken up by Aaj Tak and Globo, which are large media publications in India and Brazil, respectively.
The remaining four websites—XVideos, PornHub, XHamster, and XNXX—specialize in adult content, and are located in a variety of countries. These are often referred to as “tube sites” since they are built on the YouTube model.
Realsrv, the only adult-oriented site in the top 50 located in the U.S., is interesting to delve into as well, since it’s far from a household name. The website essentially supports advertising efforts by redirecting users away from the content they were viewing over to another page (generally premium adult content). This is one of the key ways that adult websites earn revenue.
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