Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: quantum physics – Page 547

Demis Hassabis: DeepMind — AI, Superintelligence & the Future of Humanity

Demis Hassabis is the CEO and co-founder of DeepMind. Please support this podcast by checking out our sponsors:
- Mailgun: https://lexfridman.com/mailgun.
- InsideTracker: https://insidetracker.com/lex to get 20% off.
- Onnit: https://lexfridman.com/onnit to get up to 10% off.
- Indeed: https://indeed.com/lex to get $75 credit.
- Magic Spoon: https://magicspoon.com/lex and use code LEX to get $5 off.

EPISODE LINKS:
Demis’s Twitter: https://twitter.com/demishassabis.
DeepMind’s Twitter: https://twitter.com/DeepMind.
DeepMind’s Instagram: https://instagram.com/deepmind.
DeepMind’s Website: https://deepmind.com.
Plasma control paper: https://nature.com/articles/s41586-021-04301-9
Quantum simulation paper: https://science.org/doi/10.1126/science.abj6511
The Emperor’s New Mind (book): https://amzn.to/3bx03lo.
Life Ascending (book): https://amzn.to/3AhUP7z.

PODCAST INFO:
Podcast website: https://lexfridman.com/podcast.
Apple Podcasts: https://apple.co/2lwqZIr.
Spotify: https://spoti.fi/2nEwCF8
RSS: https://lexfridman.com/feed/podcast/
Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4
Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41

OUTLINE:
0:00 — Introduction.
1:01 — Turing Test.
8:27 — Video games.
30:02 — Simulation.
32:13 — Consciousness.
37:13 — AlphaFold.
50:53 — Solving intelligence.
1:03:12 — Open sourcing AlphaFold & MuJoCo.
1:13:18 — Nuclear fusion.
1:17:22 — Quantum simulation.
1:20:30 — Physics.
1:23:57 — Origin of life.
1:28:36 — Aliens.
1:36:43 — Intelligent life.
1:39:52 — Conscious AI
1:53:07 — Power.
1:57:37 — Advice for young people.
2:05:43 — Meaning of life.

SOCIAL:
- Twitter: https://twitter.com/lexfridman.
- LinkedIn: https://www.linkedin.com/in/lexfridman.
- Facebook: https://www.facebook.com/lexfridman.
- Instagram: https://www.instagram.com/lexfridman.
- Medium: https://medium.com/@lexfridman.
- Reddit: https://reddit.com/r/lexfridman.
- Support on Patreon: https://www.patreon.com/lexfridman

Mind-Bending Physics Reveals Electrons Travel in “Lanes” While Moving Along Quantum Wires

A new study from the University of Cambridge reveals that electrons can simultaneously possess different energy levels.

Electrons, one of the most fundamental components of our universe, still hold a few secrets that puzzle modern scientists. Since the 1920s, physicists have worked to try and unravel the workings of these negatively charged particles, and how they behave in different situations. Now, research conducted at the University of Cambridge has shed new light on a pair of key factors–the spins and charges of electrons–revealing even more about their unique behavior.

Background: Spin and Charge

In the 1920s, scientists conducted several experiments that revealed electrons possess multiple spins. One of these, the Stern-Gerlach experiment, involved a beam of silver atoms directed at an uneven magnetic field. The magnetic field split the beam in two, revealing two different spins for the electron.

Objective Reality May Not Exist at All, Quantum Physicists Say

If objective reality doesn’t exist, where does that leave us? Does reality emerge into physicality directly from nothing, or could it be that conceptual reality is just as real as the physical universe? If that is the case, then physical matter is just a product of conception, and consciousness is its backdrop.

Does reality exist, or does it take shape when an observer measures it? Akin to the age-old conundrum of whether a tree makes a sound if it falls in a forest with no one around to hear it, the above question remains one of the most tantalizing in the field of quantum mechanics, the branch of science dealing with the behavior of subatomic particles on the microscopic level.

In a field where intriguing, almost mysterious phenomena like “quantum superposition” prevail—a situation where one particle can be in two or even “all” possible places at the same time—some experts say reality exists outside of your own awareness, and there’s nothing you can do to change it. Others insist “quantum reality” might be some form of Play-Doh you mold into different shapes with your own actions. Now, scientists from the Federal University of ABC (UFABC) in the São Paulo metropolitan area in Brazil are adding fuel to the suggestion that reality might be “in the eye of the observer.”

In their new research, published in the journal Communications Physics in April, the scientists in Brazil attempted to verify the “complementarity principle” the famous Danish physicist Niels Bohr proposed in 1928. It states that objects come with certain pairs of complementary properties, which are impossible to observe or measure at the same time, like energy and duration, or position and momentum. For example, no matter how you set up an experiment involving a pair of electrons, there’s no way you can study the position of both quantities at the same time: the test will illustrate the position of the first electron, but obscure the position of the second particle (the complementary particle) at the same time.

What is Quantum Physics, and how does it work?

What is Quantum Physics 0, and how does it work? Is quantum theory capable of explaining the universe’s mysteries?

What is Quantum Physics, and how does it work? Is quantum theory capable of explaining the universe’s mysteries? For centuries and decades, many scientists worldwide have been attempting to decipher the mysteries of the cosmos. Scientists have only cracked a handful of the universe’s inexhaustible secrets despite this. But, more importantly, are we uncovering the secrets of the cosmos correctly? Are we broadening our quest in the opposite direction of what we have mistaken for the limitless secrets of the universe? We don’t even know where to start looking for the answers to such questions.

Many outstanding scientists across the globe are using quantum theory to try to answer the universe’s unresolved riddles. And it has been somewhat successful. Quantum physics is responsible for numerous modern technologies that have revolutionized the planet. And those excellent scientists deserve to be praised. Learn what quantum physics is all about.

Michelle Simmons: quantum machines at the atomic limit | The Royal Society

Join Professor Michelle Simmons to find out how scientists are delivering Richard Feynman’s dream of designing materials at the atomic limit for quantum machines. 🔔Subscribe to our channel for exciting science videos and live events, many hosted by Brian Cox, our Professor for Public Engagement: https://bit.ly/3fQIFXB

#Physics #Quantum #RichardFeynman.

Sixty years ago, the great American physicist Richard Feynman delivered a famous lecture in which he urged experimentalists to push for the creation of new materials with features designed at the atomic limit. He called this the “final question”: whether ultimately “we can arrange the atoms the way we want: the very atoms all the way down!”

Professor Simmons will explain how to manufacture materials and devices whose properties are determined by the placement of individual atoms, and will highlight the creative explosion in new devices that has followed and the many new insights into the quantum world that this revolution has made possible.

Watch next:
Putting the sun in a bottle: the path to fusion power ▶ https://youtu.be/eYbNSgUQhdY
What is (qunatum) biology? with Jim Al-Khalili ▶ https://youtu.be/_To6oNh9-ZQ
Nanomaterials: from bench to bedside ▶ https://youtu.be/Z5FG1dSdI7E

The Royal Society is a Fellowship of many of the world’s most eminent scientists and is the oldest scientific academy in continuous existence.

Continue reading “Michelle Simmons: quantum machines at the atomic limit | The Royal Society” | >

The struggle to find the origins of time

What is time? Why is it so different from space? And where did it come from? Scientists are still stumped by these questions — but working harder than ever to answer them.

St. Augustine said of time, “If no one asks me, I know what it is. If I wish to explain to him who asks, I don’t know.” Time is an elusive concept: We all experience it, and yet, the challenge of defining it has tested philosophers and scientists for millennia.

It wasn’t until Albert Einstein that we developed a more sophisticated mathematical understanding of time and space that allowed physicists to probe deeper into the connections between them. In their endeavors, physicists also discovered that seeking the origin of time forces us to confront the origins of the universe itself.

What exactly is time, and how did it come into being? Did the dimension of time exist from the moment of the Big Bang, or did time emerge as the universe evolved? Recent theories about the quantum nature of gravity provide some unique and fantastic answers to these millennia-old questions.

The Size of an Atom: How Scientists First Guessed It’s About Quantum Physics

Atoms are all about a tenth of a billionth of a meter wide (give or take a factor of 2). What determines an atom’s size? This was on the minds of scientists at the turn of the 20th century. The particle called the “electron” had been discovered, but the rest of an atom was a mystery. Today we’ll look at how scientists realized that quantum physics, an idea which was still very new, plays a central role. (They did this using one of their favorite strategies: “dimensional analysis”, which I described in a recent post.)

Since atoms are electrically neutral, the small and negatively charged electrons in an atom had to be accompanied by something with the same amount of positive charge — what we now call “the nucleus”. Among many imagined visions for what atoms might be like was the 1904 model of J.J. Thompson, in which he imagined the electrons are embedded within a positively-charged sphere the size of the whole atom.

But Thompson’s former student Ernest Rutherford gradually disproved this model in 1909–1911, through experiments that showed the nucleus is tens of thousands of times smaller (in radius) than an atom, despite having most of the atom’s mass.

5 REAL Possibilities for Interstellar Travel

Tweet at us! @pbsspacetime.
Facebook: facebook.com/pbsspacetime.
Email us! pbsspacetime [at] gmail [dot] com.
Comment on Reddit: http://www.reddit.com/r/pbsspacetime.
Support us on Patreon! http://www.patreon.com/pbsspacetime.

Help translate our videos! https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g.

The prospect of interstellar travel is no longer sci-fi. It COULD be achievable within our lifetime! But, how would an interstellar rocket-ship work? On this week’s episode of Space Time, Matt talks options for interstellar travel — from traditional rocket fuel to antimatter drives, could we travel to other star systems? Watch this episode of Space Time to find out!

“Quantum Entanglement & Spooky Action at a Distance”:
https://www.youtube.com/watch?v=ZuvK-od647c.

“The Real Meaning of E=Mc²”:

“Could You Fart Your Way To The Moon”:

Continue reading “5 REAL Possibilities for Interstellar Travel” | >