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Sabine Hossenfelder: Backreaction: Can Physics Be Too Speculative?


#science #physics #cosmology

<3 Sabine :)
 

Sabine Hossenfelder: Backreaction: Can Physics Be Too Speculative?


#science #physics #cosmology

<3 Sabine :)
 

Physicists show that flying beer coasters will flip 0.45 seconds into flight | Ars Technica


This is applied #physics
#beer
 
Physics, philosophy, and free will.

Is everything predetermined? Why physicists are reviving a taboo idea


Superdeterminism makes sense of the quantum world by suggesting it is not as random as it seems, but critics say it undermines the whole premise of science. Does the idea deserve its terrible reputation?

[Here's an uncomfortable series of questions:

Let's say, for the sake of argument, that people do have "free will".

What does that even mean?

What is the will free of?

If these questions seem too abstract, let us consider some more concrete smaller questions.

(1) Are we free to choose what we believe?

If you answered "yes" then I challenge you to believe -- I mean really believe not merely accept for the sake of argument -- that 2 + 2 = elephant.

You can't do it. But if you had freedom to choose your beliefs, then you could.

(2) Are we free to choose how we act?

This, I think, comes closer to what most thinking people believe "free will" entails.

But even this does not survive scrutiny.

(2.1) What determines how you act?

Well, presumably, it is some combination of what you believe, what your goals are, and what you think the current circumstances are. Note that your beliefs about current circumstances are a special case of "what you believe", so these can be collapsed into a single thing.

OK, so then your actions are a function of (a) what you believe, and (b) what your goals are.

Having established that your beliefs are not under your control (or do you really believe that "2 + 2 = elephant" yet?), this leaves your goals as the only refuge of "free will".

(2.2) What determines your goals?

(2.2.1) Is it "god"? If so, then you did not choose them, and "free will" loses.

(2.2.2) Is it nature? If so, then you did not choose them, and "free will" loses.

(2.2.3) Is it your soul? If so, then where did your soul get those goals? Return to step 2.2.1.

(2.2.4) Is it "random"? If this is your preferred answer, then is "freedom" really the same thing as "randomness"? Is the die free to "choose" what side turns up when you roll it? If so, is this the way you wish to conceptualize your own "soul"?

None of this required physics. All it takes is logic; basic thinking things through.

"Free will" is worse than impossible. It is incoherent.

Physicists are jacking themselves off if they think they can answer, or even speak intelligently to, this question. This is a question for logic first; science only comes into play once the logic is worked out.]

#Physics #Philosophy #FreeWill
 
Physics, philosophy, and free will.

Is everything predetermined? Why physicists are reviving a taboo idea


Superdeterminism makes sense of the quantum world by suggesting it is not as random as it seems, but critics say it undermines the whole premise of science. Does the idea deserve its terrible reputation?

[Here's an uncomfortable series of questions:

Let's say, for the sake of argument, that people do have "free will".

What does that even mean?

What is the will free of?

If these questions seem too abstract, let us consider some more concrete smaller questions.

(1) Are we free to choose what we believe?

If you answered "yes" then I challenge you to believe -- I mean really believe not merely accept for the sake of argument -- that 2 + 2 = elephant.

You can't do it. But if you had freedom to choose your beliefs, then you could.

(2) Are we free to choose how we act?

This, I think, comes closer to what most thinking people believe "free will" entails.

But even this does not survive scrutiny.

(2.1) What determines how you act?

Well, presumably, it is some combination of what you believe, what your goals are, and what you think the current circumstances are. Note that your beliefs about current circumstances are a special case of "what you believe", so these can be collapsed into a single thing.

OK, so then your actions are a function of (a) what you believe, and (b) what your goals are.

Having established that your beliefs are not under your control (or do you really believe that "2 + 2 = elephant" yet?), this leaves your goals as the only refuge of "free will".

(2.2) What determines your goals?

(2.2.1) Is it "god"? If so, then you did not choose them, and "free will" loses.

(2.2.2) Is it nature? If so, then you did not choose them, and "free will" loses.

(2.2.3) Is it your soul? If so, then where did your soul get those goals? Return to step 2.2.1.

(2.2.4) Is it "random"? If this is your preferred answer, then is "freedom" really the same thing as "randomness"? Is the die free to "choose" what side turns up when you roll it? If so, is this the way you wish to conceptualize your own "soul"?

None of this required physics. All it takes is logic; basic thinking things through.

"Free will" is worse than impossible. It is incoherent.

Physicists are jacking themselves off if they think they can answer, or even speak intelligently to, this question. This is a question for logic first; science only comes into play once the logic is worked out.]

#Physics #Philosophy #FreeWill
 
Bild/Foto
#science #physics #acronym
https://en.wikipedia.org/wiki/Proton-enhanced_nuclear_induction_spectroscopy
Proton-enhanced nuclear induction spectroscopy (PENIS), also called cross-polarisation (CP), is a nuclear magnetic resonance technique invented by Michael Gibby and Alexander Pines (who named it specifically for the inappropriate acronym) while they were graduate students in the lab of Professor John S. Waugh at the Massachusetts Institute of Technology.
 
Bild/Foto
#science #physics #acronym
https://en.wikipedia.org/wiki/Proton-enhanced_nuclear_induction_spectroscopy
Proton-enhanced nuclear induction spectroscopy (PENIS), also called cross-polarisation (CP), is a nuclear magnetic resonance technique invented by Michael Gibby and Alexander Pines (who named it specifically for the inappropriate acronym) while they were graduate students in the lab of Professor John S. Waugh at the Massachusetts Institute of Technology.
 

#News #Physics #Muon #Muons #Sixty #Symbols #SIXTΨ #SγMBΦLS #Playlist


It’s not just this video - but there are already 355 videos about physics in all it’s ways and discoveries, all in one big chronological ordered playlist for you to have a nice time binge watching physics… ;)

#randomshit ;)
 
QUarks liegen weit über meinem Verständnislevel. Und jetzt haben Quarks etwas gemacht, was auch die Experten überrascht hat - da es nicht dem entspricht, was das "Standardmodell der Elementarteilchenphysik" erwartet. #physics #CERN #LargeHadronCollider #LHC #high-energyphysics #particles #science
 
Physics is, hopefully, simple. Physicists are not.
Edward Teller (1908-2003) Hungarian-American theoretical physicist
Conversations on the Dark Secrets of Physics, ch. 10 (1991) [with Wendy Teller and Wilson Talley]

\#quotation #quote #complexity #human-nature #personality #physics #science #scientist #simplicity
More notes and sourcing on WIST:
Conversations on the Dark Secrets of Physics, ch. 10 (1991) [with Wendy Teller and Wilson Talley]
 
Physics is, hopefully, simple. Physicists are not.
Edward Teller (1908-2003) Hungarian-American theoretical physicist
Conversations on the Dark Secrets of Physics, ch. 10 (1991) [with Wendy Teller and Wilson Talley]

\#quotation #quote #complexity #human-nature #personality #physics #science #scientist #simplicity
More notes and sourcing on WIST:
Conversations on the Dark Secrets of Physics, ch. 10 (1991) [with Wendy Teller and Wilson Talley]
 
Bild/Foto
La Constante de Planck. Planck Constant.
H = Planck Constant. V = Fréquence. E = Énergie.
L'Énergie Photon = La Fréquence x La Constante de Planck.
#Physique #Physics #MaxPlanck #Science #Mathematic #Quantum
 
Bild/Foto
La Constante de Planck. Planck Constant.
H = Planck Constant. V = Fréquence. E = Énergie.
L'Énergie Photon = La Fréquence x La Constante de Planck.
#Physique #Physics #MaxPlanck #Science #Mathematic #Quantum
 

these generators are not designed for home/commercial use they only work on youtube

Best description of 'free energy devices' ever!


#TIL #physics #science #free #energy #randomshit ;)
 
Notthingnam University Presents:



Have fun with the playlist 'All videos in chronological order' maintained by me. ;)

#Science #notthingam #university #Professor #Mike #Merrifield #starlight #stars #quasars #light #physics #astrophysics #milky #way
 

SIXTΨ SγMBΦLS


A new episode from the sixty symbols channel.
Featuring Professor Mike Merrifield from the University of Nottingham talking about neutron stars and pulsars.
To watch the whole playlist with all now 348 episodes in chronological order, you can use my playlist for a good time of physics binge watching: https://www.youtube.com/playlist?list=PLBMcTlYW4v53fzjfKkvUvFfH-TLYN_pI7

Have fun!

#science #physics #astronomy #astrophysics #neutron #stars #pulsar #youtube #playlist #binge #watch #notsorandomshit #nottingham-university #brady #haram #Professor #Mike #Merrifield
 

The airborne lifetime of small speech droplets and their potential importance to SARS-CoV-2 transmission | Zenodo

Movies that show the experimental setup and the full 85-minute observation of speech droplet nuclei.

The full movie recording of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles.
https://zenodo.org/record/3770559#.X5szhtT7SCP

#covid-19 #CoronaVirus #pandemic #SARS-CoV-2 #speech #health #aerosol #aerosols #particles #physics #science
 

The airborne lifetime of small speech droplets and their potential importance to SARS-CoV-2 transmission | Zenodo

Movies that show the experimental setup and the full 85-minute observation of speech droplet nuclei.

The full movie recording of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles.
https://zenodo.org/record/3770559#.X5szhtT7SCP

#covid-19 #CoronaVirus #pandemic #SARS-CoV-2 #speech #health #aerosol #aerosols #particles #physics #science
 

'Giant atoms' enable quantum processing and communication in one

MIT researchers have introduced a quantum computing architecture that can perform low-error quantum computations while also rapidly sharing quantum information between processors. The work represents a key advance toward a complete quantum computing platform.

Previous to this discovery, small-scale quantum processors have successfully performed tasks at a rate exponentially faster than that of classical computers. However, it has been difficult to controllably communicate quantum information between distant parts of a processor. In classical computers, wired interconnects are used to route information back and forth throughout a processor during the course of a computation. In a quantum computer, however, the information itself is quantum mechanical and fragile, requiring fundamentally new strategies to simultaneously process and communicate quantum information on a chip.

"One of the main challenges in scaling quantum computers is to enable quantum bits to interact with each other when they are not co-located," says William Oliver, an associate professor of electrical engineering and computer science, MIT Lincoln Laboratory fellow, and associate director of the Research Laboratory for Electronics. "For example, nearest-neighbor qubits can easily interact, but how do I make 'quantum interconnects' that connect qubits at distant locations?"

The answer lies in going beyond conventional light-matter interactions.
_. . ._
Read more -- https://phys.org/news/2020-07-giant-atoms-enable-quantum.html

#quantumComputing #quantum #computing #qubit #physics #information #research #PhysOrg
 

'Giant atoms' enable quantum processing and communication in one

MIT researchers have introduced a quantum computing architecture that can perform low-error quantum computations while also rapidly sharing quantum information between processors. The work represents a key advance toward a complete quantum computing platform.

Previous to this discovery, small-scale quantum processors have successfully performed tasks at a rate exponentially faster than that of classical computers. However, it has been difficult to controllably communicate quantum information between distant parts of a processor. In classical computers, wired interconnects are used to route information back and forth throughout a processor during the course of a computation. In a quantum computer, however, the information itself is quantum mechanical and fragile, requiring fundamentally new strategies to simultaneously process and communicate quantum information on a chip.

"One of the main challenges in scaling quantum computers is to enable quantum bits to interact with each other when they are not co-located," says William Oliver, an associate professor of electrical engineering and computer science, MIT Lincoln Laboratory fellow, and associate director of the Research Laboratory for Electronics. "For example, nearest-neighbor qubits can easily interact, but how do I make 'quantum interconnects' that connect qubits at distant locations?"

The answer lies in going beyond conventional light-matter interactions.
_. . ._
Read more -- https://phys.org/news/2020-07-giant-atoms-enable-quantum.html

#quantumComputing #quantum #computing #qubit #physics #information #research #PhysOrg
 

Ten years of the #Sun in one hour – #Nasa releases mesmerising #space #film | #Science | The Guardian


https://www.theguardian.com/science/2020/jul/01/ten-years-of-the-sun-in-one-hour-nasa-releases-mesmerising-space-film


#Astronomy #Physics
 
Bild/Foto
A #brachistochrone #curve is the curve of fastest descent between two points not directly below each other -- interestingly not a straight or polygonal line but a cycloid.

#math #physics
 
Bild/Foto
A #brachistochrone #curve is the curve of fastest descent between two points not directly below each other -- interestingly not a straight or polygonal line but a cycloid.

#math #physics
 
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