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Quantum RAM: Modelling the big questions with the very small

Griffith’s Professor Geoff Pryde, who led the project, says that such processes could be simulated using a “quantum hard drive”, much smaller than the memory required for conventional simulations.

“Stephen Hawking once stated that the 21st century is the ‘century of complexity’, as many of today’s most pressing problems, such as understanding climate change or designing transportation system, involve huge networks of interacting components,” he says.

“Their simulation is thus immensely challenging, requiring storage of unprecedented amounts of data. What our experiments demonstrate is a solution may come from quantum theory, by encoding this data into a quantum system, such as the quantum states of light.”

Einstein once said that “God does not play dice with the universe,” voicing his disdain with the idea that quantum particles contain intrinsic randomness.

“But theoretical studies showed that this intrinsic randomness is just the right ingredient needed to reduce the memory cost for modelling partially random statistics,” says Dr Mile Gu, a member of the team who developed the initial theory.

In contrast with the usual binary storage system - the zeroes and ones of bits - quantum bits can be simultaneously 0 and 1, a phenomenon known as quantum superposition.

The researchers, in their paper published in Science Advances, say this freedom allows quantum computers to store many different states of the system being simulated in different superpositions, using less memory overall than in a classical computer.

The team constructed a proof-of-principle quantum simulator using a photon - a single particle of light - interacting with another photon.

They measured the memory requirements of this simulator, and compared it with the fundamental memory requirements of a classical simulator, when used to simulate specified partly random processes.

The data showed that the quantum system could complete the task with much less information stored than the classical computer- a factor of 20 improvements at the best point.

“Although the system was very small - even the ordinary simulation required only a single bit of memory - it proved that quantum advantages can be achieved,” Pryde says.

“Theoretically, large improvements can also be realized for much more complex simulations, and one of the goals of this research program is to advance the demonstrations to more complex problems.”

Griffith University

If Word crashes or shuts down and your document didn't save, search ".asd" in the file Explorer under "This/My PC". It should be there.

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Wikileaks Document Dump Reveals Secret CIA Raccoon Spy Program

Wikileaks has released a trove of documents containing details of CIA hacking tools and surveillance initiatives, among them, a top secret domestic spy program code named RocketEars, that enlists raccoons as listeners.

Security experts and journalists have been poring over the cache of leaked documents, collectively known as “Vault 7,” since Tuesday. Many explain security exploits used in consumer electronics like iPhones and Samsung TVs, which can be used to spy on targets. But the raccoon program is particularly strange.

“No one would ever suspect the raccoon rummaging through your backyard trash is working for the CIA,” says Dennis O’Conner, a security analyst and former consultant to the U.S. intelligence services. “It’s a perfect secret program. But what we don’t understand yet is how the raccoons communicate their surveillance back to base. They’re not the most reliable reporters.”

The Fluffington Post will update this story as it develops.

via Marslettuce

Plane crashes near Montgomery Field, pilot killed

A pilot was killed when a small plane crashed near Montgomery Field in Kearny Mesa, San Diego police said.

I just found out about this today. This was the Doctor who had performed my knee replacement and was treating me before and after the surgery. I am very upset at his death and I hope all of you join me in praying for his family. I will miss Dr. Serocki very much as will his friends, colleagues and patients I’m sure. He was a great doctor, very caring and conscientious. This is a tremendous loss for our community. Again, I ask that you join me in praying for his family. Thank you all.  Rick Young