Jan 22, 2022 06:47 PM
(This post was last modified: Jan 22, 2022 07:56 PM by C C.)
Superabsorption in an organic microcavity: Toward a quantum battery
https://www.science.org/doi/10.1126/sciadv.abk3160
Abstract. The rate at which matter emits or absorbs light can be modified by its environment, as markedly exemplified by the widely studied phenomenon of superradiance. The reverse process, superabsorption, is harder to demonstrate because of the challenges of probing ultrafast processes and has only been seen for small numbers of atoms.
Its central idea—superextensive scaling of absorption, meaning larger systems absorb faster—is also the key idea underpinning quantum batteries. Here, we implement experimentally a paradigmatic model of a quantum battery, constructed of a microcavity enclosing a molecular dye.
Ultrafast optical spectroscopy allows us to observe charging dynamics at femtosecond resolution to demonstrate superextensive charging rates and storage capacity, in agreement with our theoretical modeling. We find that decoherence plays an important role in stabilizing energy storage.
Our work opens future opportunities for harnessing collective effects in light-matter coupling for nanoscale energy capture, storage, and transport technologies. (MORE)
Russian space junk nearly downs Chinese satellite
https://thedebrief.org/russian-space-jun...satellite/
INTRO: A Chinese science satellite narrowly avoided a potentially catastrophic collision with debris from an exploded Russian satellite earlier this week. Part of a Russian anti-satellite missile test last November that drew worldwide condemnation, the same field of space junk recently forced the crew of the ISS to take cover to avoid a catastrophic collision of their own.
After the ISS-near miss, authorities from around the globe condemned Russia for the reckless testing of their anti-satellite missile, which took a previously defunct satellite and blasted it into as many as 1,500 individual pieces. This test also took place in Low Earth Orbit, where the ISS shares space with thousands of commercial and government satellites, many of which now face increased danger from potential debris collisions.
The Debrief previously reported on the fallout from the Russian missile test, noting that some are starting to refer to the former Soviet state as “the Mad Dog of Space.”
Now, [url=China has spoken out about Russia’s recklessness as well, noting that they have hundreds of satellites at this same orbit that are now under constant threat due to the huge amount of extra space junk created by Russia’s missile test. According to a report from the South China Morning Post... (MORE - details)
https://www.science.org/doi/10.1126/sciadv.abk3160
Abstract. The rate at which matter emits or absorbs light can be modified by its environment, as markedly exemplified by the widely studied phenomenon of superradiance. The reverse process, superabsorption, is harder to demonstrate because of the challenges of probing ultrafast processes and has only been seen for small numbers of atoms.
Its central idea—superextensive scaling of absorption, meaning larger systems absorb faster—is also the key idea underpinning quantum batteries. Here, we implement experimentally a paradigmatic model of a quantum battery, constructed of a microcavity enclosing a molecular dye.
Ultrafast optical spectroscopy allows us to observe charging dynamics at femtosecond resolution to demonstrate superextensive charging rates and storage capacity, in agreement with our theoretical modeling. We find that decoherence plays an important role in stabilizing energy storage.
Our work opens future opportunities for harnessing collective effects in light-matter coupling for nanoscale energy capture, storage, and transport technologies. (MORE)
Russian space junk nearly downs Chinese satellite
https://thedebrief.org/russian-space-jun...satellite/
INTRO: A Chinese science satellite narrowly avoided a potentially catastrophic collision with debris from an exploded Russian satellite earlier this week. Part of a Russian anti-satellite missile test last November that drew worldwide condemnation, the same field of space junk recently forced the crew of the ISS to take cover to avoid a catastrophic collision of their own.
After the ISS-near miss, authorities from around the globe condemned Russia for the reckless testing of their anti-satellite missile, which took a previously defunct satellite and blasted it into as many as 1,500 individual pieces. This test also took place in Low Earth Orbit, where the ISS shares space with thousands of commercial and government satellites, many of which now face increased danger from potential debris collisions.
The Debrief previously reported on the fallout from the Russian missile test, noting that some are starting to refer to the former Soviet state as “the Mad Dog of Space.”
Now, [url=China has spoken out about Russia’s recklessness as well, noting that they have hundreds of satellites at this same orbit that are now under constant threat due to the huge amount of extra space junk created by Russia’s missile test. According to a report from the South China Morning Post... (MORE - details)