Faster Method to Read Quantum Memory

Artistic impression of qubit (blue chip) readout using the quantum states of a resonator (blue and red jets). Figure credit: Heikka Valja.
Artistic impression of qubit (blue chip) readout using the quantum states of a resonator (blue and red jets). Figure credit: Heikka Valja.

Scientists have developed a faster way to read information out of qubits, the basic building blocks of a quantum computer. The potential computing revolution that quantum computers have long promised is based on their weird property called superposition. Namely, qubits can take both logical states 0 and 1 simultaneously, on top of any value in between. By mastering superpositions of the whole quantum memory, quantum computers can quickly solve problems that would require too much computing time from regular computers working with simply 0s and 1s.

However, qubits are sensitive, and currently hold quantum information for less than a millisecond ...

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Old Stars Live Longer than we thought

Thanks to new observations from the ALMA telescope in Chile, it became clear that the stellar wind of this red giant forms a spiral. This is an indirect indication that the star is not alone, but part of a binary star.
Credit: ALMA (ESO/NAOJ/NRAO)/L. Decin et al.

Towards the end of their lives some 95% of stars evolve into red giants which lose their mass via a “stellar wind.” Eventually they end up as planetary nebulae, ionized gas with a central hot star, a white dwarf. Researchers form 14 European scientific institutions, among them the IAC, have detected the existence of a binary interaction which had not been noticed by the scientific community...

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Young Bone Marrow Rejuvenates Aging Mouse Brains

Microglia in brains of old mice have larger cell bodies with fewer and shorter branches than those in young mice. But microglia of old mice who received bone marrow transplants (BMT) from young mice resembled those of young mice; transplants from older mice didn’t have that effect. Microglia play an important role in brain health.
Credit: Cedars-Sinai / Communications Biology

Transplanting marrow from young lab mice to old mice preserves memory and learning skills. The findings support an emerging model that attributes cognitive decline, in part, to aging of blood cells, which are produced in bone marrow.

“While prior studies have shown that introducing blood from young mice can reverse cognitive decline in old mice, it is not well understood how this happens,” said Helen Goodridge, Ph...

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Citizen scientist finds ancient White Dwarf star encircled by Puzzling Rings

illustration of white dwarf LSPM J0207+3331
In this illustration, an asteroid (bottom left) breaks apart under the powerful gravity of LSPM J0207+3331, the oldest, coldest white dwarf known to be surrounded by a ring of dusty debris. Scientists think the system’s infrared signal is best explained by two distinct rings composed of dust supplied by crumbling asteroids.
Credits: NASA’s Goddard Space Flight Center/Scott Wiessinger

A volunteer working with the NASA-led Backyard Worlds: Planet 9 project has found the oldest and coldest known white dwarf – an Earth-sized remnant of a Sun-like star that has died – ringed by dust and debris. Astronomers suspect this could be the first known white dwarf with multiple dust rings.

The star, LSPM J0207+3331 or J0207 for short, is forcing researchers to reconsider models of planetary syst...

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