Universe, human brain and Internet have similar structures
Washington: The structure of the universe and the laws that govern its growth may be more similar than previously thought to the structure and growth of the human brain and other complex networks, such as the Internet or a social network of trust relationships between people, according to a new study.
“By no means do we claim that the universe is a global brain or a computer,” said Dmitri Krioukov, co-author of the paper, published by the Cooperative Association for Internet Data Analysis (CAIDA), based at the San Diego Supercomputer Center (SDSC) at the University of California, San Diego.
“But the discovered equivalence between the growth of the universe and complex networks strongly suggests that unexpectedly similar laws govern the dynamics of these very different complex systems,” Krioukov noted.
Having the ability to predict – let alone trying to control – the dynamics of complex networks remains a central challenge throughout network science. Structural and dynamical similarities among different real networks suggest that some universal laws might be in action, although the nature and common origin of such laws remain elusive.
By performing complex supercomputer simulations of the universe and using a variety of other calculations, researchers have now proven that the causal network representing the large-scale structure of space and time in our accelerating universe is a graph that shows remarkable similarity to many complex networks such as the Internet, social, or even biological networks.
“These findings have key implications for both network science and cosmology,” said Krioukov.
“We discovered that the large-scale growth dynamics of complex networks and causal networks are asymptotically (at large times) the same, explaining the structural similarity between these networks,” the researcher asserted.
SDSC Director Michael Norman added, “This is a perfect example of interdisciplinary research combining math, physics, and computer science in totally unexpected ways.”
“Who would have guessed that the emergence of our universe’s four-dimensional spacetime from the quantum vacuum would have anything to do with the growth of the Internet? Causality is at the heart of both, so perhaps the similarity Krioukov and his collaborators found is to be expected.”
Of course the network representing the structure of the universe is astronomically huge – in fact it can be infinite. But even if it is finite, researchers’ best guess is that it is no smaller than 10250 atoms of space and time. (That’s the digit 1 followed by 250 zeros.) For comparison, the number of water molecules in all the oceans in the world has been estimated to be 4.4 x 1046.
Yet the researchers found a way to downscale this humongous network while preserving its vital properties, by proving mathematically that these properties do not depend on the network size in a certain range of parameters, such as the curvature and age of our universe.
After the downscaling, the research team turned to Trestles, one of SDSC’s data-intensive supercomputers, to perform simulations of the universe’s growing causal network. By parallelizing and optimizing the application, Robert Sinkovits, a computational scientist with SDSC, was able to complete in just over one day a computation that was originally projected to require three to four years.
“In addition to being able to complete these simulations much faster than previously ever imagined, the results perfectly matched the theoretical predictions of the researchers,” said Sinkovits.
“The most frequent question that people may ask is whether the discovered asymptotic equivalence between complex networks and the universe could be a coincidence. Of course it could be, but the probability of such a coincidence is extremely low. Coincidences in physics are extremely rare, and almost never happen. There is always an explanation, which may be not immediately obvious,” said Krioukov.
“Such an explanation could one day lead to a discovery of common fundamental laws whose two different consequences or limiting regimes are the laws of gravity (Einstein’s equations in general relativity) describing the dynamics of the universe, and some yet-unknown equations describing the dynamics of complex networks,” added Marian Boguna, a member of the research team from the Departament de Física Fonamental at the Universitat de Barcelona, Spain.
The study was published in the science journal Nature’s Scientific Reports.
More from India
More from World
More from Sports
More from Entertaiment
- Dr Subhash Chandra Show: Aspiring for more than what you have!
- ISIS to buy first nuclear weapon from Pak?
- Mumbai: CCTV captures assailant with gun at Film City
- Mathura SSP receives death threat letter, message for PM Modi
- Reservation issue: Police register case against Bainsla, 20 others
- Zee Media exclusive chat with 'Welcome to Karachi' cast
- Zee Media exclusive interview with Haryana CM Manohar Lal Khattar
- Watch: Fast N Facts @ 7:30pm
- Haridwar: Hotel Radisson Blu sealed for polluting Ganga
- Girl in Punjab's Pathankot quit studies for fear of eve-teasing
- Special: Furious over rising water crisis, people take to the streets
- UP Minister allegedly threatens, abuses Gonda businessman
- Manali: Heavy corruption found in environmental taxes
- Couple in Bihar asked to pay Rs 50,000 as 'tax' for inter-caste marriage
- Aapke Sitare: Astro prediction for May 24, 2015
- IPL 2015 Final: MI vs CSK - As it happened...
- Heatwave continues in North India; death toll in Andhra Pradesh, Telangana more than 400
- CBSE.nic.in 12th XII Results 2015: CBSE Board (cbseresults.nic.in) Class 12th XII Exam Results 2015 to be announced on May 25
- Heatwave kills 223 in AP, Telangana, Chandrababu Naidu announces compensation; Delhi records hottest day
- 'Tanu Weds Manu Returns' starts on a good note at the Box Office!
- CBSE 12th Result 2015 to be announced on Monday
- Death threat to PM Narendra Modi ahead of Mathura rally sends police into tizzy
- Organisation demands re-examination of AIPMT 2015
- IPL 2015 final: Mumbai Indians thrash Chennai Super Kings by 41 runs to lift second title
- Standoff with LG: Arvind Kejriwal calls emergency session of Delhi Assembly
- Kejriwal completes 100 days in office, AAP says centre 'shadow boxing' over row with LG
- CBSE Class 12th Board Results 2015 to be announced on Monday, May 25
- Online filing of applications for UPSC civil services exam begins
- No alliance with JD-U in Bihar: BJP
- Not just today, Muslims feeling alienated since 1947: Najma Heptulla