Quantum Computing News and Discussions

[weatheriscool]

Microscopy images could lead to new ways to control excitons for quantum computing
https://phys.org/news/2023-02-microscop ... antum.html
by Alison Hatt, Lawrence Berkeley National Laboratory

Excitons are drawing attention as possible quantum bits (qubits) in tomorrow's quantum computers and are central to optoelectronics and energy-harvesting processes. However, these charge-neutral quasiparticles, which exist in semiconductors and other materials, are notoriously difficult to confine and manipulate.

Now, for the first time, researchers have created and directly observed highly localized excitons confined in simple stacks of atomically thin materials. The work confirms theoretical predictions and opens new avenues for controlling excitons with custom-built materials.

"The idea that you can localize excitons on specific lattice sites by simply stacking these 2D materials is exciting because it has a variety of applications, from designer optoelectronic devices to materials for quantum information science," said Archana Raja, co-lead of the project and a staff scientist at Lawrence Berkeley National Laboratory's (Berkeley Lab) Molecular Foundry, whose group led the device fabrication and optical spectroscopy characterization.

[weatheriscool]

Quantum breakthrough could revolutionise computing

Scientists have come a step closer to making multi-tasking 'quantum' computers, far more powerful than even today's most advanced supercomputers.

Quantum computers make use of the weird qualities of sub-atomic particles.

So-called quantum particles can be in two places at the same time and also strangely connected even though they are millions of miles apart.

A Sussex University team transferred quantum information between computer chips at record speeds and accuracy.

https://www.bbc.com/news/science-environment-64492456

[lechwall]

Quantum breakthrough could revolutionise computing

Scientists have come a step closer to making multi-tasking 'quantum' computers, far more powerful than even today's most advanced supercomputers.

Quantum computers make use of the weird qualities of sub-atomic particles.

So-called quantum particles can be in two places at the same time and also strangely connected even though they are millions of miles apart.

A Sussex University team transferred quantum information between computer chips at record speeds and accuracy.

https://www.bbc.com/news/science-environment-64492456

AI & Quantum Computing are the two pillars on which we will reach longevity escape velocity.
When we're able to simulate chemical reactions more accurately using quantum computers hopefully this will lead to an explosion in successful drug discovery as opposed to todays incredibly hit and miss trial and error processes.

[wjfox]

[weatheriscool]

New material may offer key to solving quantum computing issue
https://phys.org/news/2023-02-material- ... issue.html
by Pennsylvania State University

A new form of heterostructure of layered two-dimensional (2D) materials may enable quantum computing to overcome key barriers to its widespread application, according to an international team of researchers.

The researchers were led by a team that is part of the Penn State Center for Nanoscale Science (CNS), one of 19 Materials Research Science and Engineering Centers (MRSEC) in the United States funded by the National Science Foundation. Their work was published Feb. 13 in Nature Materials.

A regular computer consists of billions of transistors, known as bits, and are governed by binary code ("0" = off and "1" = on). A quantum bit, also known as a qubit, is based on quantum mechanics and can be both a "0" and a "1" at the same time. This is known as superposition and can enable quantum computers to be more powerful than the regular, classical computers.

There is, however, an issue with building a quantum computer.

"IBM, Google, and others are trying to make and scale up quantum computers based upon superconducting qubits," said Jun Zhu, Penn State professor of physics and corresponding author of the study. "How to minimize the negative effect of a classical environment, which causes error in the operation of a quantum computer, is a key problem in quantum computing."

[wjfox]