via University of Nottingham
An international team of researchers have found a new way to speed up quantum computing that could pave the way for huge leaps forward in computer processing power.
Scientists from the University of Nottingham and University of Stockholm have sped-up trapped ion quantum computing using a new experimental approach – trapped Rydberg ions; their results have just been published in Nature.
In conventional digital computers, logic gates consist of operational bits that are silicon based electronic devices. Information is encoded in two classical states (“0” and “1”) of a bit. This means that capacities of a classical computer increase linearly with the number of bits. To deal with emerging scientific and industrial problems, large computing facilities or supercomputers are built.
Quantum entanglement enhancing capacity
A quantum computer is operated using quantum gates, i.e. basic circuit operations on quantum bits (qubits) that are made of microscopic quantum particles, such as atoms and molecules. A fundamentally new mechanism in a quantum computer is the utilisation of quantum entanglement, which can bind two or a group of qubits together such that their state can no longer be described by classical physics. The capacity of a quantum computer increases exponentially with the number of qubits. The efficient usage of quantum entanglement drastically enhances the capacity of a quantum computer to be able to deal with challenging problems in areas including cryptography, material, and medicine sciences.
Among the different physical systems that can be used to make a quantum computer, trapped ions have led the field for years. The main obstacle towards a large-scale trapped ion quantum computer is the slow-down of computing operations as the system is scaled-up. This new research may have found the answer to this problem.
The experimental work was conducted by the group of Markus Hennrich at SU using giant Rydberg ions, 100,000,000 times larger than normal atoms or ions. These huge ions are highly interactive, and exchange quantum information in less than a microsecond. The interaction between them creates quantum entanglement. Chi Zhang from the University of Stockholm and colleagues used the entangling interaction to carry out a quantum computing operation (an entangling gate) around 100 times faster than is typical in trapped ion systems.
Chi Zhang explains, “Usually quantum gates slow down in bigger systems. This isn’t the case for our quantum gate and Rydberg ion gates in general! Our gate might allow quantum computers to be scaled up to sizes where they are truly useful!”
Theoretical calculations supporting the experiment and investigating error sources have been conducted by Weibin Li (University of Nottingham, UK) and Igor Lesanovsky (University of Nottingham, UK, and University of Tübingen, Germany). Their theoretical work confirmed that there is indeed no slowdown expected once the ion crystals become larger, highlighting the prospect of a scalable quantum computer.
Our theoretical analysis shows that a trapped Rydberg ion quantum computer is not only fast, but also scalable, making large-scale quantum computation possible without worrying about environmental noise. The joint theoretical and experimental work demonstrate that quantum computation based on trapped Rydberg ions opens a new route to implement fast quantum gates and at the same time might overcome many obstacles found in other systems.
Weibin Li, Assistant Professor, School of Physics and Astronomy, University of Nottingham
Currently the team is working to entangle larger numbers of ions and achieve even faster quantum computing operations.
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
- A Peculiar State of Matter in Layers of Semiconductors Could Advance Quantum Computingon August 23, 2021 at 9:07 pm
In a study that could benefit quantum computing, researchers show a superlattice embedded with nanodots may be immune from dissipating energy to the environment. Scientists around the world are ...
- What Has to Happen for Quantum Computing to Hit Mainstream?on August 23, 2021 at 5:05 pm
It's still early days for quantum computing, where the fundamental technology remains unsettled, and the nature of workloads is fuzzy.
- Experiments Prove Quantum Computing Errors Correlated, Tied to Cosmic Rayson August 23, 2021 at 4:14 am
Research by a Lawrence Livermore National Laboratory (LLNL) physicist and a host of collaborators is shedding new light on one of the major challenges to realizing the promise and potential of quantum ...
- Researchers Open A Path Towards Quantum Computingon August 23, 2021 at 4:12 am
Researchers create a scalable quantum computing platform that reduces the number of devices needed to achieve quantum speed.
- Supporting the scale-up of quantum computerson August 23, 2021 at 2:00 am
Martin Weides is consultant technical director to Oxford Instruments NanoScience, which builds equipment for applications from quantum science to nanotechnology ...
Go deeper with Google Headlines on:
Go deeper with Bing News on:
- It's Impossible To Tell If This Story Exists, According to Quantum Physicson August 23, 2021 at 6:00 am
Traditionally, the thought experiment shows that you can't take another person's observations at face value—your reality isn't necessarily theirs. Researchers from Austria and Canada have proven that ...
- Philosophy of Quantum Information and Entanglementon August 22, 2021 at 3:06 am
Recent work in quantum information science has produced a revolution in our understanding of quantum entanglement. Scientists now view entanglement as a physical resource with many important ...
- Researchers open a path toward quantum computing in real-world conditionson August 19, 2021 at 5:00 pm
This power buildup enhances chances for photons to interact, which produces quantum entanglement between fields of light in the microcomb. Through multiplexing, Yi's team verified the generation ...
- Exploring quantum gravity—for whom the pendulum swings.on August 18, 2021 at 1:47 pm
When it comes to a marriage with quantum theory, gravity is the lone holdout among the four fundamental forces in nature.
- Exploring quantum gravityâ for whom pendulum swingson August 18, 2021 at 12:42 pm
When it comes to a marriage with quantum theory, gravity is the lone holdout among the four fundamental forces in nature. The three ...