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David Friedberg

๐Ÿ‘ค Speaker
7365 total appearances

Appearances Over Time

Podcast Appearances

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

Right.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

That's so interesting.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

I've always thought, and there's obviously been companies started around the idea of creating an infinite battery where you could store technically forever electricity because the electrons are just moving around.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

If it's superconducting, they can just spin forever around that circuit.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

So this Josephson junction is two superconductors.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

They're on either side of a barrier that you create, an insulating barrier.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And then maybe just explain the experiment and what you guys measured.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And this was all while you were in grad school, right?

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

So I just want to simplify that you have these two superconductors split by this barrier.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

There's some tunneling.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

Some of these electrons are actually going through the barrier to the other side.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And then you can effectively measure all of these different changes as you change the temperature.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

You guys were putting different voltage states into this circuit that you built.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And what you saw and what you measured and what you demonstrated was that there were these very kind of discrete or specific changes that happened that basically demonstrated quantum mechanics at scale.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And so by measuring those discrete frequencies, you now had proof that there was quantum mechanics happening at a macro scale.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

That's right.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And you published this work.

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And was there a lot of attention when you published this work?

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

This was in 1985, 86?

All-In with Chamath, Jason, Sacks & Friedberg
Nobel Prize in Physics Winner: John Martinis on the State of Quantum

And so was there much attention on this work at the time?