Theoretical physicists in Innsbruck, Austria, have proposed a scalable quantum computer architecture. The new model, developed by Wolfgang Lechner, Philipp Hauke and Peter Zoller, overcomes fundamental limitations of programmability in current approaches that aim at solving real-world general optimization problems by exploiting quantum mechanics.
Within the last several years, considerable progress has been made in developing a quantum computer, which holds the promise of solving problems a lot more efficiently than a classical computer. Physicists are now able to realize the basic building blocks, the quantum bits (qubits) in a laboratory, control them and use them for simple computations. For practical application, a particular class of quantum computers, the so-called adiabatic quantum computer, has recently generated a lot of interest among researchers and industry. It is designed to solve real-world optimization problems conventional computers are not able to tackle. All current approaches for adiabatic quantum computation face the same challenge: The problem is encoded in the interaction between qubits; to encode a generic problem, an all-to-all connectivity is necessary, but the locality of the physical quantum bits limits the available interactions.
“The programming language of these systems is the individual interaction between each physical qubit. The possible input is determined by the hardware. This means that all these approaches face a fundamental challenge when trying to build a fully programmable quantum computer,” explains Wolfgang Lechner from the Institute for Quantum Optics and Quantum Information (IQOQI) at the Austrian Academy of Sciences in Innsbruck.
Fully programmable quantum computer
Theoretical physicists Wolfang Lechner, Philipp Hauke and Peter Zoller have now proposed a completely new approach. The trio, working at the University of Innsbruck and the IQOQI, suggest overcoming the challenges by detaching the logical qubit from the physical implementation. Each physical qubit corresponds to one pair of logical qubits and can be tuned by local fields. These could be electrical fields when dealing with atoms and ions or magnetic fields in superconducting qubits. “Any generic optimization problem can be fully programmed via the fields,” explains co-author Philipp Hauke from the Institute for Theoretical Physics at the University of Innsbruck, Austria. “By using this approach we are not only avoiding the limitations posed by the hardware but we also make the technological implementation scalable.”
Read more: Upgrading the quantum computer
The Latest on: Quantum Computer
via Google News
The Latest on: Quantum Computer
- Molecule’s electronic structure is simulated on a quantum computeron September 5, 2020 at 7:23 am
Google announced to great fanfare that its 53-qubit Sycamore computer had achieved quantum advantage. This means that a quantum computer can solve at least one problem much faster than any ...
- New evidence that the quantum world is even stranger than we thoughton September 4, 2020 at 1:10 pm
New experimental evidence of a collective behavior of electrons to form "quasiparticles" called "anyons" has been reported by a team of scientists at Purdue University.
- Extracting order from a quantum measurement finally shown experimentallyon September 4, 2020 at 6:56 am
In physics, it is essential to be able to show a theoretical assumption in actual, physical experiments. For more than a hundred years, physicists have been aware of the link between the concepts of ...
- Google’s Quantum Computer Achieves Chemistry Milestoneon September 4, 2020 at 4:51 am
A downsized version of the company’s Sycamore chip performed a record-breaking simulation of a chemical reaction ...
- Science Minister Launches National Quantum Computing Centreon September 2, 2020 at 8:52 am
Science Minister Amanda Solloway has launched the UK’s National Quantum Computing Centre (NQCC) to place the UK at the forefront of this ...
- The UK is building its first commercial quantum computeron September 2, 2020 at 7:56 am
The government announced a £10 million investment to let businesses and researchers make the most of quantum capabilities.
- Rigetti Computing to Lead £10M Consortium to Launch First Commercial Quantum Computer in UKon September 2, 2020 at 2:45 am
The Rigetti-led consortium to bring the first commercial quantum computer to the UK includes Oxford Instruments, University of Edinburgh, Phasecraft and Standard Chartered Bank. The consortium will ...
- How will quantum computing impact your industry?on September 1, 2020 at 11:39 am
Take this quick, multiple choice survey and tell us if your company has a use for quantum computing as a service.
- Quantum Computing May Be Closer Than You Thinkon September 1, 2020 at 4:27 am
Five new quantum information science centers will marry the R&D strengths of academia, industry and U.S. national laboratories ...
- IBM’s Customers Show Us Why It’s Important To Build A Quantum Computing Strategy Todayon August 29, 2020 at 8:04 am
While it's early days in quantum computing, IBM's customer use cases showcase how businesses are looking to the nascent technology to solve real-world problems.
via Bing News