Quantum things are a big deal these days, but you know what's even more of a big deal? Photons. Just wait, you'll be getting upgraded from the Verizon Quantum plan to the Verizon Photon plan in like 2 years tops. Photons, i.e., light, is the electricity of the 21st century.
^That image btw: "Stimulated Photon Emission" -- Illustration of a gold-covered probe tip injecting electrons into a carefully located imperfection in an atomically thin material. The energy from each electron causes the highly localized emission of a single photon, which may then be guided to a detector. Credit: Ignacio Gaubert, 2020.
Time-reversal of an unknown quantum state
Aug 2020, phys.org
Stochastic baths, who can say no?
Abstract - In the present work, the scientists propose using a thermodynamic reservoir at finite temperatures to form a high-entropy stochastic bath to thermalize a given quantum system and experimentally increase thermal disorder or entropy in the system.-A. V. Lebedev et al. Time-reversal of an unknown quantum state, Communications Physics (2020). DOI: 10.1038/s42005-020-00396-0-Seth Lloyd et al. Quantum principal component analysis, Nature Physics (2014). DOI: 10.1038/nphys3029-Gonzalo Manzano et al. Quantum Fluctuation Theorems for Arbitrary Environments: Adiabatic and Nonadiabatic Entropy Production, Physical Review X (2018). DOI: 10.1103/PhysRevX.8.031037
An electrical trigger fires single, identical photons
Oct 2020, phys.org
First time we're seeing "memory" used as an analogy for quantum coherence.
Also, "photons on demand"; wait for it.
via: Bruno Schuler et al, Electrically driven photon emission from individual atomic defects in monolayer WS2, Science Advances (2020). DOI: 10.1126/sciadv.abb5988
Quantum entanglement demonstrated aboard orbiting CubeSat
Jun 2020, phys.org
Quantum computing in outer space.
In a critical step toward creating a global quantum communications network, researchers have generated and detected quantum entanglement onboard a CubeSat nanosatellite weighing less than 2.6 kilograms and orbiting the Earth.
The coldest computers in the world
Aug 2020, BBC News
Also in outer space.
The world's first integrated quantum communication network
Jan 2021, phys.org
Yes they have; via the University of Science and Technology of China.
Using drones to create local quantum networks
Jan 2021, phys.org
This is what it will be like:
A team of researchers affiliated with several institutions in China has used drones to create a prototype of a small airborne quantum network. In their paper published in the journal Physical Review Letters, the researchers describe sending entangled particles from one drone to another and from a drone to the ground.
Robots learn faster with quantum technology
Mar 2021, phys.org
"We are just at the beginning of understanding the possibilities of quantum artificial intelligence" says Philip Walther, head of an international collaboration of experimental physicists, "and thus every new experimental result contributes to the development of this field, which is currently seen as one of the most fertile areas for quantum computing."
Fertile, indeed.
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Photon Avalanche, Mikołaj Łukaszewicz at Polish Academy of Sciences, 2021 |
'Multiplying' light could be key to ultra-powerful optical computers
Feb 2021, phys.org
Using polaritons - which are half-light and half-matter
Heat-free optical switch would enable optical quantum computing chips
Mar 2021, phys.org
Molybdenum disulfide ushers in era of post-silicon photonics
Mar 2021, phys.org
Study suggests that silicon could be a photonics game-changer
Apr 2021, phys.org
In addition to being good for controlling electronic information, silicon is also good for controlling light, which will be integral to quantum computing.
Discovered by mistake of course:
"Our finding was lucky because we weren't looking for it. We were trying to understand how a very small number of phosphorus atoms in a silicon crystal could be used for making a quantum computer and how to use light beams to control quantum information stored in the phosphorus atoms."We were astonished to find that the phosphorus atoms were re-emitting light beams that were almost as bright as the very intense laser we were shining on them. We shelved the data for a couple of years while we thought about proving where the beams were coming from. It's a great example of the way science proceeds by accident, and also how pan-European teams can still work together very effectively."via University of Surrey: Nils Dessmann et al, Highly efficient THz four-wave mixing in doped silicon, Light: Science & Applications (2021). DOI: 10.1038/s41377-021-00509-6
Wafer-scale production of graphene-based photonic devices
Feb 2021, phys.org
It's here, graphene chips to the rescue.
via Graphene Flagship: Marco A. Giambra et al, Wafer-Scale Integration of Graphene-Based Photonic Devices, ACS Nano (2021). DOI: 10.1021/acsnano.0c09758
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