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Jan 31, 2023

A quantum video reel: Time-of-flight quantum tomography of an atom in an optical tweezer

Posted by in categories: particle physics, quantum physics

When it comes to creating ever more intriguing quantum systems, a constant need is finding new ways to observe them in a wide range of physical scenarios. JILA Fellow Cindy Regal and JILA and NIST Fellow Ana Maria Rey have teamed up with Oriol Romero-Isart from the University of Innsbruck and IQOQI to show that a trapped particle in the form of an atom readily reveals its full quantum state with quite simple ingredients, opening up opportunities for studies of the quantum state of ever larger particles.

In the an atom does not behave as a point particle; instead it behaves more as a wave. Its properties (e.g., its position and velocity) are described in terms of what is referred to as the wavefunction of the atom. One way to learn about the wavefunction of a particle is to let the atom fly and then capture its location with a camera.

And with the right tricks, pictures can be taken of the particle’s quantum state from many vantage points, resulting in what is known as quantum tomography (“tomo” being Greek for slice or section, and “graphy” meaning describing or recording). In the work published in Nature Physics, the authors used a rubidium atom placed carefully in a specific state of its motion in a tightly focused laser beam, known as an optical tweezer. And they were able to observe it from many vantage points by letting it evolve in the optical tweezer in time. Like a ball rolling in a bowl, at different times the velocity and location of the particle interchange, and by snapping pictures at the right time during a video reel of the ball, many vantages of the particle’s state can be revealed.

Jan 31, 2023

Dr. Eric Bapteste, Ph.D. — CNRS/AIRE — Interactomics For Deeper Understanding Of Aging And Evolution

Posted by in categories: biological, cosmology, evolution

(http://www.evol-net.fr/index.php?option=com_tlpteam&view=team&id=2&Itemid=559) is a Research Director at the French National Centre for Scientific Research (CNRS), the French state research organization and the largest fundamental science agency in Europe.

Dr. Bapteste has both a Ph.D. in evolutionary biology from Pierre and Marie Curie University and a Ph.D. in the philosophy of biology from Pantheon-Sorbonne University.

Continue reading “Dr. Eric Bapteste, Ph.D. — CNRS/AIRE — Interactomics For Deeper Understanding Of Aging And Evolution” »

Jan 31, 2023

Stephanie Dainow at Rejuvenation Startup Summit 2022

Posted by in categories: biotech/medical, life extension

New video: Stephanie Dainow, Executive Director at Lifespan.io / Lifespan Extension Advocacy Foundation, at #RejuvenationStartupSummit 2022.

Stephanie speaks about Lifespan.io advocating for the development of medical technologies to rejuvenate aged tissues and organs.

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Jan 31, 2023

Microsoft Defender can now isolate compromised Linux endpoints

Posted by in category: computing

Microsoft announced today that it added device isolation support to Microsoft Defender for Endpoint (MDE) on onboarded Linux devices.

Enterprise admins can manually isolate Linux machines enrolled as part of a public preview using the Microsoft 365 Defender portal or via API requests.

Once isolated, threat actors will no longer have a connection to the breached system, cutting off their control and blocking malicious activity like data theft.

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Jan 31, 2023

AI Has Successfully Imitated Human Evolution—and Might Do It Even Better

Posted by in category: robotics/AI

The implications are staggering.

Jan 31, 2023

Data shows Humanity May Reach Singularity Within Just 7 Years

Posted by in categories: robotics/AI, singularity

The word singularity has grabbed a lot of attention in the world of artificial intelligence. It refers to the moment AI exceeds out of human control and changes society.

Jan 31, 2023

A “Missing Link” — Researchers Shed Light on the Origin of Complex Life Forms

Posted by in categories: biological, genetics

What led to the emergence of complex organisms on Earth? It’s a significant unanswered question in biology. Researchers from Christa Schleper’s team at the University of Vienna and Martin Pilhofer’s team at ETH Zurich have taken a step towards resolving it. The scientists succeeded in cultivating a special archaeon and characterizing it more precisely using microscopic methods.

This member of the Asgard archaea exhibits unique cellular characteristics and may represent an evolutionary “missing link” to more complex life forms such as animals and plants. The study was recently published in the journal Nature.

All life forms on earth are divided into three major domains: eukaryotes, bacteria and archaea. Eukaryotes include the groups of animals, plants and fungi. Their cells are usually much larger and, at first glance, more complex than the cells of bacteria and archaea. The genetic material of eukaryotes, for example, is packaged in a cell nucleus and the cells also have a large number of other compartments. Cell shape and transport within the eukaryotic cell are also based on an extensive cytoskeleton. But how did the evolutionary leap to such complex eukaryotic cells come about?

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Jan 31, 2023

Distributed harmonic patterns of structure-function dependence orchestrate human consciousness

Posted by in categories: biotech/medical, mathematics, neuroscience

Connectome harmonic decomposition (CHD) generalises the mathematics of the Fourier transform to the network structure of the human brain. The traditional Fourier transform operates in the temporal domain (Fig. 1a): decomposition into temporal harmonics quantifies to what extent the signal varies slowly (low-frequency temporal harmonics) or quickly (high-frequency temporal harmonics) over time (Fig. 1b). Analogously, CHD re-represents a spatial signal in terms of harmonic modes of the human connectome, so that the spatial frequency (granularity) of each connectome harmonic quantifies to what extent the organization of functional brain signals deviates from the organization of the underlying structural network (Fig. 1c, d). Therefore, CHD is fundamentally different from, and complementary to, traditional approaches to functional MRI data analysis. This is because CHD does not view functional brain activity as composed of signals from discrete spatial locations, but rather as composed of contributions from distinct spatial frequencies: each connectome harmonic is a whole-brain pattern with a characteristic spatial scale (granularity)—from an entire hemisphere to just a few millimetres.

On one hand, this means that CHD is unsuitable to address questions pertaining to spatial localisation and the involvement of specific neuroanatomical regions; such questions have been extensively investigated within the traditional framework of viewing brain activity in terms of spatially discrete regions, and several previous studies have implicated specific neuroanatomical regions in supporting consciousness33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49. On the other hand, CHD enables us to consider how brain activity across states of consciousness is shaped by the brain’s distributed network of structural connections, reflecting the contribution of global patterns at different spatial scales—each arising from the network topology of the human connectome. We emphasise that neither approach is inherently superior, but rather they each provide a unique perspective on brain function: one localised, the other distributed.

Jan 31, 2023

DeepMind’s ChatGPT-Like AI Writes Amazing Screenplays!

Posted by in categories: entertainment, physics, robotics/AI

❤️ Check out Weights & Biases and sign up for a free demo here: https://wandb.com/papers.

📝 The paper “Co-Writing Screenplays and Theatre Scripts with Language Models: An Evaluation by Industry Professionals” is available here:
https://deepmind.github.io/dramatron/details.html.

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Jan 31, 2023

Generating music with AI! (MusicLM Explained)

Posted by in categories: media & arts, robotics/AI

(Sponsor) Take this survey and you can win new gear and help the Developer community (and mine): https://www.developereconomics.net/?member_id=whatsai&utm_medium=youtube.

References:
►Read the full article: https://www.louisbouchard.ai/musiclm/
►Agostinelli et al., 2023: MusicLM, https://arxiv.org/pdf/2301.11325.pdf.
►Listen to more results: https://google-research.github.io/seanet/musiclm/examples/
►My Newsletter: https://www.louisbouchard.ai/newsletter/
►Support me on Patreon: https://www.patreon.com/whatsai.
►Join Our Discord community, Learn AI Together: https://discord.gg/learnaitogether.

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