Quantum Computing

Information teleported between two computer chips for the first time

Information teleported between...
Researchers have managed to quantum teleport information between two computer chips for the first time
Researchers have managed to quantum teleport information between two computer chips for the first time
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Researchers have managed to quantum teleport information between two computer chips for the first time
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Researchers have managed to quantum teleport information between two computer chips for the first time

Scientists at the University of Bristol and the Technical University of Denmark have achieved quantum teleportation between two computer chips for the first time. The team managed to send information from one chip to another instantly without them being physically or electronically connected, in a feat that opens the door for quantum computers and quantum internet.

This kind of teleportation is made possible by a phenomenon called quantum entanglement, where two particles become so entwined with each other that they can “communicate” over long distances. Changing the properties of one particle will cause the other to instantly change too, no matter how much space separates the two of them. In essence, information is being teleported between them.

Hypothetically, there’s no limit to the distance over which quantum teleportation can operate – and that raises some strange implications that puzzled even Einstein himself. Our current understanding of physics says that nothing can travel faster than the speed of light, and yet, with quantum teleportation, information appears to break that speed limit. Einstein dubbed it “spooky action at a distance.”

Harnessing this phenomenon could clearly be beneficial, and the new study helps bring that closer to reality. The team generated pairs of entangled photons on the chips, and then made a quantum measurement of one. This observation changes the state of the photon, and those changes are then instantly applied to the partner photon in the other chip.

“We were able to demonstrate a high-quality entanglement link across two chips in the lab, where photons on either chip share a single quantum state,” says Dan Llewellyn, co-author of the study. “Each chip was then fully programmed to perform a range of demonstrations which utilize the entanglement. The flagship demonstration was a two-chip teleportation experiment, whereby the individual quantum state of a particle is transmitted across the two chips after a quantum measurement is performed. This measurement utilizes the strange behavior of quantum physics, which simultaneously collapses the entanglement link and transfers the particle state to another particle already on the receiver chip.”

The team reported a teleportation success rate of 91 percent, and managed to perform some other functions that will be important for quantum computing. That includes entanglement swapping (where states can be passed between particles that have never directly interacted via a mediator), and entangling as many as four photons together.

Information has been teleported over much longer distances before – first across a room, then 25 km (15.5 mi), then 100 km (62 mi), and eventually over 1,200 km (746 mi) via satellite. It’s also been done between different parts of a single computer chip before, but teleporting between two different chips is a major breakthrough for quantum computing.

The research was published in the journal Nature Physics.

Source: University of Bristol

20 comments
RobWoods
My hope is that this new technology of quantum entanglement with it's instant communication can be successfully used for instant communication between computers and personnel in long space flights great distances apart.
Jerome Morley Larson Sr eAIA
I thought that quantum entanglement was between photons that had been split in two different directions; to me it was obvious that there would be instant communication between them via the light stream itself since no time elapses between particles traveling apart from each other at the speed of light — methinks we are being ... um... bullwinked — 91% in a computer = zero.
Rainer Kordmaa
"and yet, with quantum teleportation, information appears to break that speed limit" Citation needed, the paper does not make that claim, this is pure fiction.
ANC
Split photons get entangled by gravitons sustaining the orbit around them. The graviton is the medium quantum of entanglement and smallest/fastest particle than a photon. A laser or optic fiber solenoid will generate a perpendicular wave of gravitons just like an electron solenoid generates a perpendicular wave of photons. My Atomic-Cosmic quantum theory is superior than "strange teleportation" or "spooky action at a distance": http://www.sandaero.com/sandaero_028.htm
Troublesh00ter
As has been previously noted, this technology would make for hack-proof communications, both a good thing if your a good guy or a bad thing if your a bad guy, trying to keep good guys from your schemes. The real loaded question is: Can this technology be made practical for general use, or would it be reserved for ultra-secure military and/or government communications?
Expanded Viewpoint
I would like to see some videos of this hardware in action, before I buy any stock in it. Or is all of this just some simulations and wild conjectures flying about the room?? Methinks that the emperor might be standing before us, very naked.
Worzel
Ignoring the, ''abduction/anal probe'' reports, it's often asked, if the universe is possibly so full of life, why dont we see flocks of alien space ships visiting us? Well, as physical transportation is not really viable for travel between stars and galaxies, then an advanced society wouldn't use it. What they would use, eventually, is teleportation, as all good scifi stories predict. The natural extension of information teleportation, is matter transportation, as matter is, effectively, only electronic information in dense lumps. So, the reason that we dont see flocks of space ships, is, because they dont exist. They are superseded by matter transporters, which I think is the natural development from quantum teleportation. Sorry, but 'Star Trek' is just fantasy, not even fiction.
Douglas Rogers
The wave function can collapse instantaneously because no time travel paradox is created.
ljaques
Hmm, they had me until "via satellite". Worzel, consider I Love Lucy (Heck, =all= broadcast TV) and CSPAN to be the reason our brothers from space fail to show up here. We need to mature first. // Now we need FTL drives, FTL comms, anti-gravity, and ships which will move us between stars.
Jim Kennington
Agree with Rainer Kordmaa - this article completely misstates the science involved. Quantum entanglement can't be used to transmit information faster than light. The state is instantaneously shared, but any information contained in the state such as "spin up means 1" was either agreed upon before-hand or discussed afterwards, being transmitted well within the speed of light...