The Time-Traveling Quantum Computer

New work by researchers indicates that in harnessing entanglement, NP-complete problems can be solved efficiently even when all time-traveling systems are completely isolated from the past.


(An open timelike curve) Deutschian timelike curves.
(a) depicts a physical visualization of a CTC,
where an object entering one mouth of a wormhole
at some point tA may jump to a prior time tB
(with respect to an chronology respecting observer)
and interact with its past self via some unitary U.
(b) In the special case where no interaction occurs,
we obtain an open timelike curve. This naturally occurs,
for example, in instances where the wormhole mouths
are spatially separated.

Around ten years ago researcher Dave Bacon, now at Google, showed that a time-travelling quantum computer could quickly solve a group of problems, known as NP-complete, which mathematicians have lumped together as being hard.

The problem was, Bacon's quantum computer was travelling around 'closed timelike curves'. These are paths through the fabric of spacetime that loop back on themselves. General relativity allows such paths to exist through contortions in spacetime known as wormholes...

However, the new work shows that a quantum computer can solve insoluble problems even if it is travelling along "open timelike curves", which don't create causality problems. That's because they don't allow direct interaction with anything in the object's own past: the time travelling particles (or data they contain) never interact with themselves. Nevertheless, the strange quantum properties that permit "impossible" computations are left intact.

Stephen Baxter wrote about a CTC (Closed-Timeline-Curve Time-Travel Computer) in his 2004 novel Exultant:

But Nilis had assigned her to another part of the project, the development of his "CTC computer" as he called it, his closed-timeline-curve time-travel computing machine.

Via PhysOrg; thanks to Winchell Chung (@nyrath) of Project Rho for pointing this one out and providing an sf reference!

Scroll down for more stories in the same category. (Story submitted 12/3/2015)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Computer ")

The Largest Virtual Universe!
'...a machine able literally to contain the Universe Itself .' - Stanislaw Lem, 1965.

ARM Wants To Build Brain Chips
'Slivers of microsoft, angular fragments of colored silicon...' - William Gibson, 1984.

Robot Swarms Controlled With Augmented Reality
'You're not thinking in enough dimensions...' - Daniel Suarez, 2009.

Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'- Arthur C. Clarke, 1956.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

JAXA's Int-Ball Drone To Follow Astronauts In Space Station
'I want you to build me some of those.'

Amazon Patents Annoying Robot That Follows You
'The... machine, being homotropic, headed toward them, still bleating...'

Hand Gestures And Body Poses Control Devices
'He waved his hand... the circuit switched...'

Rovable Robots Crawl Across Your Body
'Most of the crew have the tiny imp ride on their shoulder...'

Sansar Social Virtual Reality Platform In 2017?
'And just as a daydreamer forgets his actual surroundings, and sees other realities...'

Cellphone Harvests Power From Ambient Radio Signals And Light
A battery-free phone.

Desktopography Makes Virtual Desktops Real
'Ender doodled on his desk, drawing contour maps of mountainous islands and then telling his desk to display them in three dimensions...'

LaWS Laser Can Take Out Rogue Drones
Looks like a weapon for the Runaway squad!

Moon Express Lunar Robot Mining: Shine On, Harvest Moon
'The bulldozer moved through the lunar strip mine... '

Liquid Body Armor For TALOS Exoskeleton
'... instantly became rigid all over when something struck it...'

Hyperloop One Video Shows It Works!
'Complete evacuation of the interior of the tubes [and] a wave that provides the new propulsive energy for the cars...'

Chairless Chair Exoskeleton By Sapetti
'Earth's scientists... devised rigid metallic clothing...'

Publishing Technologies In Science Fiction
Well, this should be enough references to start...

Russia Working On Military Exoskeletons
'Вы похожи на большую стальную гориллу...'

3D Printed Bionic Chinese Skin
Your skin is ready!

Flexup Tire Design Good For Tumblebugs
'Each spoke telescopes into five sections.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.