Information has been TELEPORTED simultaneously between two chips for the first time which could help ‘protect the world’s data’ on superfast quantum computers
- University of Bristol experts created chips to generate the quantum information
- They used ‘quantum entanglement’ to teleport the particles between two chips
- The team say this could lead to the creation of a new secure ‘quantum internet’
- The research is a ‘vital step’ in the process of creating more advanced circuits
Information has been ‘teleported’ between two computer chips for the first time, a move that could lead to a more secure ‘quantum internet’, researchers claim.
Experts from the University of Bristol and the Technical University of Denmark were able to ‘instantly send the data’ using a process called ‘quantum entanglement’.
The information was exchanged without electrical or physical contact as the process allows these particles to instantly communicate over large distances.
This is useful in quantum computing and networks as changing one particle will automatically change the other, say researchers from Bristol.
The team say their study could lead to a quantum internet that ‘would ultimately protect the worlds information from malicious attacks’.
Researchers from Bristol have created a chip that produced light particles within its circuits. The light particles are then able to use quantum entanglement to communicate instantly over a distance. This is a stock image of a possible quantum chip
Their breakthrough involved creating specially designed and programmable circuits within a chip that are able to generate light particles.
The particles are then able to use quantum entanglement to ‘teleport’ between different chips and maintain instant communication.
The team had a 91 per cent success rate when getting the particles to talk to each other through the specially programmed computer chips.
‘We were able to demonstrate a high-quality entanglement link across two chips in the lab,’ says Dan Llewellyn, co-author of the study.
This new research is important as quantum computers, internet and other technologies rely on ‘quantum information’,’ he said.
‘This is encoded in single particles that are difficult to control and measure’.
Bristol researchers were able to link different chips together using quantum entanglement -allowing them to manipulate one particle and have it change its linked particle on the other chip
Dr Llewellyn and the team have been able to create devices that can generate and manipulate single particles of light within programmable circuits.
The chips they created encode quantum information in light generated inside the circuits, they then process the information with high efficiency.
HOW DOES QUANTUM ENTANGLEMENT WORK?
In quantum entanglement two particles become entwined together.
They are so interconnected that they can continue to ‘communicate’ over long distances.
Changing the properties of one particle causes the other to instantly change as well.
This can happen regardless of the distance separating the two particles – effectively ‘teleporting’ the shared information.
There is no hypothetical limit to the distance between the two particles.
With quantum teleportation, information seems to travel instantaneously, meaning it is potentially moving faster than light.
Einstein called it ‘spooky action at a distance.’
The team says that teleportation is not only useful for quantum communication but is a fundamental building-block of quantum computing.
‘Establishing an entangled communication link between two chips in the lab however has proven to be highly challenging’, they said in a statement.
However, they said their new process will enable higher quality, faster quantum circuits and is one of the most efficient generated to date.
They were also able to show other functionality such as ‘swapping’, a process that is required for quantum networks to operate properly.
They were also able to show a process involving photon states that is needed for the creation of a quantum internet and in quantum computers.
Dr Llewellyn says this is an important step that could lead to the creation of ‘more complex quantum circuits required in quantum computing and communications’.
Lead author, Dr Jianwei Wang said: ‘In the future, integration of quantum photonic devices and classical electronic controls will open the door for fully chip-based CMOS-compatible quantum communication and information processing networks.’
The research was published in the journal Nature Physics.
WHAT IS A QUANTUM COMPUTER AND HOW DOES IT WORK?
The key to a quantum computer is its ability to operate on the basis of a circuit not only being ‘on’ or ‘off’, but occupying a state that is both ‘on’ and ‘off’ at the same time.
While this may seem strange, it’s down to the laws of quantum mechanics, which govern the behaviour of the particles which make up an atom.
At this micro scale, matter acts in ways that would be impossible at the macro scale of the universe we live in.
Quantum mechanics allows these extremely small particles to exist in multiple states, known as ‘superposition’, until they are either seen or interfered with.
A scanning tunneling microscope shows a quantum bit from a phosphorus atom precisely positioned in silicon. Scientists have discovered how to make the qubits ‘talk to one another
A good analogy is that of a coin spinning in the air. It cannot be said to be either a ‘heads’ or ‘tails’ until it lands.
The heart of modern computing is binary code, which has served computers for decades.
While a classical computer has ‘bits’ made up of zeros and ones, a quantum computer has ‘qubits’ which can take on the value of zero or one, or even both simultaneously.
One of the major stumbling blocks for the development of quantum computers has been demonstrating they can beat classical computers.
Google, IBM, and Intel are among companies competing to achieve this.