This Could Test the Quantum Twin Paradox

Physicists have come up with a new experiment to test the quantum twin paradox using a pair of atoms in a superposition. It's an interesting idea because it could tell us more about how Einstein's equivalence principle works in the quantum realm, ultimately helping us develop a theory of quantum gravity.

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#science #sciencenews #physics #einstein

[traian]

"Back then, when thinking still worked" is true for so many things these days it's scary.

[DataIsBeautifulOfficial]

Einstein vs quantum twins - sounds like the next Marvel movie.

[STEVEBURTON]

"Just checking to see if you're listening" Gotta love her dry humor.

[aaronjennings]

Optical tweezers can be configured in various ways to achieve different trapping and manipulation capabilities. Here are some of the different beam configurations and techniques used:
Single Gaussian Beam:
The most common configuration involves a single, highly focused Gaussian laser beam. This setup is used to create a diffraction-limited spot that acts as the optical trap. The beam is typically focused through a high numerical aperture objective lens.
Counter-Propagating Beams:
This configuration uses two beams propagating in opposite directions. This setup can be used to trap particles in two dimensions or to extend the working distance of the optical tweezers.
Structured Light:
Advanced configurations involve structured light, such as:
Annular Beams: Used to shift the beam in the radial direction.
Fresnel Lenses: Used to shift the beam in the axial direction.
Linear Gratings: Used to shift the beam in specific directions.
Multiple Traps: Created by combining gratings for each beam.
Tug-of-War Beams: Specialized beams for specific manipulation tasks.
Line-Shaped Traps: For trapping particles along a line.
Beams Carrying Orbital Angular Momentum: For more complex manipulation.
Chiral Beams: Using annular subzone vortex phase plates.
Polarized Beams:
Some setups split the laser beam into orthogonally polarized beams, which can be used for more precise control over the trap.
Dynamic Beam Steering:
The angle of the beam entering the objective can be actively steered using motorized mirrors, acousto-optic or electro-optic deflectors to control the trap position inside the sample chamber.
These configurations allow for a wide range of applications, from simple trapping of microscopic objects to complex manipulation and measurement of forces at the single-molecule level.

[dudemcdudeman]

Love the idea for this experiment, very cool. Please keep us posted!

[janami-dharmam]

Thanks! I hope the experiment can be done within the budget allocated

[Thomas-gk]

I really like these attention checks, educational necessary for such a complicated topic😊

[chadbailey]

I worked with optical tweezers in a biophysics research lab when I was in college. We tweezed much larger things: silica beads attached to the ends of human motor proteins. But it’s fascinating how many different applications the technology has!

[CurtisHoareau]

"even atoms have better focus than I do on a Monday morning..."..you are awesome!

[ariadnepyanfar]

Universe bless you Sabina. I have a degenerative disease that affects my concentration. But despite being 99% bedbound now, I have just enough concentration to sometimes watch these bite sized physics and climate videos, and stay a little connected. I love the universe so much. Reality is a godless miracle.

[noelstarchild]

Always my favourite physicist Sabine Hossenfelder....thank you.

[thedubdude]

This video is at the center of my interest for what you cover. Thank you.

[ericlipps]

Acceleration will also be involved as the twins separate, since presumably the twin aboard the rocket starts at zero velocity, and during the trip back, _after_ the rocket turns around, since the rocket twin will want to arrive home at zero velocity.

[collinstanton]

Terrific show, thanks so much, you are Brilliant and an excellent teacher. Thank you so much.

[nunomaroco]

Super interesting, great explanation, allthe best.

[billcook]

Sabine enjoys making videos where she can show off her pronunciation of Einstein

[luudest]

1:27 1. Does the amount of acceleration matter regarding time dilation? 2. Does it matter with wich speed the twin flew away and returned? 3. And does it matter how long the twin was away?

[daveharris]

What is a party? Never heard of it. Sounds scary.

[VicMikesvideodiary]

I'm a third of the way through this and am stunned by what's being said. Because I've been quoting and thinking about my own version of the paradox, and why things then just don't make sense under just velocity and finally arrived at the conclusion that acceleration has to be the difference factor. Only to be told some time later by someone supposedly more knowledgeable that acceleration had nothing to do with it only velocity---but it turned out I was right, which I'm just finding out about now.

[Scramjet]

Very interesting as usual, enjoyed the comment about the thought experiments from "back in the day when thinking worked", or something like that.