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Quantum researchers advance error handling

Handling errors is among the hot regions of research to advance quantum computing

Cliff Saran

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Published: 26 Jul 2022 14: 14

A recently available article published in Nature has revealed a completely new phase of matter which has the potential to do something as long-term quantum information storage.

Researchers at the Flatiron Institutes Center for Computational Quantum Physics in NY ran an experiment that subjected a quantum computers qubits to quasi-rhythmic laser pulses in line with the Fibonacci sequence, demonstrating a means of storing quantum information that’s less susceptible to errors. A Fibonacci sequence is really a group of numbers where in fact the next value in the sequence is calculated with the addition of both preceding numbers (for instance, 0, 1, 1, 2, 3, 5).

By shining a laser pulse sequence inspired by the Fibonacci numbers at atoms in the quantum computer, the physicists created a fresh phase of matter which has never been observed before. The phase gets the great things about two time dimensions.

The researchers said that information stored in the phase is a lot more protected against errors than with alternative setups currently found in quantum computers. Consequently, the info can exist for a lot longer without getting garbled a significant milestone to make quantum computing viable, said study lead author Philipp Dumitrescu.

Dumitrescu spearheaded the studys theoretical component with Andrew Potter of the University of British Columbia in Vancouver, Romain Vasseur of the University of Massachusetts, Amherst, and Ajesh Kumar of the University of Texas in Austin. The experiments were completed on a quantum computer at Quantinuum in Broomfield, Colorado, by way of a team led by Brian Neyenhuis.

Quasicrystals

An average crystal includes a regular, repeating structure, just like the hexagons in a honeycomb. A quasicrystal still has order, but its patterns never repeat. Quasicrystals are crystals from higher dimensions projected, or squished down, into lower dimensions. Those higher dimensions could even be beyond physical spaces three dimensions.

For the qubits, Dumitrescu, Vasseur and Potter proposed in 2018 the creation of a quasicrystal with time, instead of space. Whereas a periodic laser pulse would alternate (A, B, A, B, A, B, etc), the researchers created a quasi-periodic laser-pulse regimen in line with the Fibonacci sequence. In that sequence, each section of the sequence may be the sum of both previous parts (A, AB, ABA, ABAAB, ABAABABA, etc). This arrangement is ordered without repeating. Additionally it is a 2D pattern squashed right into a single dimension.

The researchers tested the idea using Quantinuums quantum computer, pulsing laser light at the computers qubits both periodically and utilizing the sequence in line with the Fibonacci numbers. The focus was on the qubits at either end of the 10-atom lineup. Dumitrescu said: With this particular quasi-periodic sequence, theres an elaborate evolution that cancels out all of the errors that go on the edge. Due to that, the edge stays quantum-mechanically coherent much, a lot longer than youd expect.

Toward error-free quantum computing

Meanwhile, in a recently available post, IBM described its quantum error mitigation strategy because the continuous path which will take us from todays quantum hardware to tomorrows fault-tolerant quantum computers.

During the last couple of years, said IBM, its researchers are suffering from and implemented two general-purpose error mitigation methods, called zero noise extrapolation (ZNE) and probabilistic error cancellation (PEC). The ZNE method cancels subsequent orders of the noise affecting the expectation value of a noisy quantum circuit by extrapolating measurement outcomes at different noise strengths.

In accordance with IBM, recent theoretical and experimental advances show that PEC can enable noise-free estimators of quantum circuits on noisy quantum computers. IBM has forecast that its method of error mitigation that is analogous to how early classical computers developed will enable it to build up quantum computers with an increase of circuits, this means greater capacity to solve hard problems.

One particular hard problem is predicting the elements, that involves processing complex non-linear differential equations operate on classical computer architectures.

Weather forecasting

The recent hot spell across Europe shows everyone the significance of accurate weather forecasts. BASF has begun to explore howproprietary quantum algorithms produced by Pasqal could 1 day be utilized to predict weather patterns to aid its digital farming business. Through the use of parameters generated by weather models, BASF can simulate crop yields and growth stages, along with predict drift when applying crop protection products.

Advanced weather and climate modelling are often operate on classical computers using physics informed neutral networks (PINN).In accordance with Hyperion Research, 5% of global high-performance computing (HPC) investments are centered on weather modelling.

Instead of depend on HPC, Pasqal aims to resolve the underlying complex non-linear differential equations in what it calls a novel and much more efficient way by implementing so-called quantum neural networks on its neutral atom quantum processors.

John Manobianco, senior weather modeller at BASFs Agricultural Solutions division, said: Leveraging Pasqals innovation for weather modelling validates quantum computings capability to go beyond so what can be performed with classical high-performance computing. Such transformational technology might help us plan climate change impacts and drive progress toward a far more sustainable future.

These algorithms is only going to be viable once researchers and quantum computing companies have improved error handling. However, a few of the techniques used to resolve problems could be run today on classical computing architectures.

For example, in a recently available podcast, Bloomberg CTO Shawn Edwards discussed why he believes mainstream quantum computing is a long time away. Although some progress has been made on the underlying science, Edwards said that a few of the more useful what to emerge from quantum computing are quantum computing-inspired algorithms. He said the quant teams at Bloomberg have already been considering improving certain algorithms based around quantum computing.

Such quantum-inspired algorithms could be the bridge that allows the mass adoption of quantum computing. Even though error correction continues to be years away, the study to boost error handling and the development of quantum-inspired code may encourage more IT heads to plan ahead and develop an IT strategy that incorporates quantum computing.

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