Announcement
Collapse
No announcement yet.
Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2
Collapse
This topic is closed.
X
X
-
Cornell University
National Champion 1967, 1970
ECAC Champion 1967, 1968, 1969, 1970, 1973, 1980, 1986, 1996, 1997, 2003, 2005, 2010
Ivy League Champion 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1977, 1978, 1983, 1984, 1985, 1996, 1997, 2002, 2003, 2004, 2005, 2012, 2014, 2018, 2019, 2020
-
Self-Own Hall of Fame nomination:
Cornell University
National Champion 1967, 1970
ECAC Champion 1967, 1968, 1969, 1970, 1973, 1980, 1986, 1996, 1997, 2003, 2005, 2010
Ivy League Champion 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1977, 1978, 1983, 1984, 1985, 1996, 1997, 2002, 2003, 2004, 2005, 2012, 2014, 2018, 2019, 2020
Comment
-
So close to getting itCode:As of 9/21/10: As of 9/13/10: College Hockey 6 College Football 0 BTHC 4 WCHA FC: 1
Originally posted by SanTropezMay your paint thinner run dry and the fleas of a thousand camels infest your dead deer.Originally posted by bigblue_dlI don't even know how to classify magic vagina smoke babies..Originally posted by KeplerWhen the giraffes start building radio telescopes they can join too.
Comment
-
I... guess?
The basic ingredients to make this time crystal are as follows: The physics equivalent of a fruit fly and something to give it a kick. The fruit fly of physics is the Ising model, a longstanding tool for understanding various physical phenomena -- including phase transitions and magnetism -- which consists of a lattice where each site is occupied by a particle that can be in two states, represented as a spin up or down.
During her graduate school years, Khemani, her doctoral advisor Shivaji Sondhi, then at Princeton University, and Achilleas Lazarides and Roderich Moessner at the Max Planck Institute for Physics of Complex Systems stumbled upon this recipe for making time crystals unintentionally. They were studying non-equilibrium many-body localized systems -- systems where the particles get "stuck" in the state in which they started and can never relax to an equilibrium state. They were interested in exploring phases that might develop in such systems when they are periodically "kicked" by a laser. Not only did they manage to find stable non-equilibrium phases, they found one where the spins of the particles flipped between patterns that repeat in time forever, at a period twice that of the driving period of the laser, thus making a time crystal.
The periodic kick of the laser establishes a specific rhythm to the dynamics. Normally the "dance" of the spins should sync up with this rhythm, but in a time crystal it doesn't. Instead, the spins flip between two states, completing a cycle only after being kicked by the laser twice. This means that the system's "time translation symmetry" is broken. Symmetries play a fundamental role in physics, and they are often broken -- explaining the origins of regular crystals, magnets and many other phenomena; however, time translation symmetry stands out because unlike other symmetries, it can't be broken in equilibrium. The periodic kick is a loophole that makes time crystals possible.
The doubling of the oscillation period is unusual, but not unprecedented. And long-lived oscillations are also very common in the quantum dynamics of few-particle systems. What makes a time crystal unique is that it's a system of millions of things that are showing this kind of concerted behavior without any energy coming in or leaking out.
"It's a completely robust phase of matter, where you're not fine-tuning parameters or states but your system is still quantum," said Sondhi, professor of physics at Oxford and co-author of the paper. "There's no feed of energy, there's no drain of energy, and it keeps going forever and it involves many strongly interacting particles."Cornell University
National Champion 1967, 1970
ECAC Champion 1967, 1968, 1969, 1970, 1973, 1980, 1986, 1996, 1997, 2003, 2005, 2010
Ivy League Champion 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1977, 1978, 1983, 1984, 1985, 1996, 1997, 2002, 2003, 2004, 2005, 2012, 2014, 2018, 2019, 2020
Comment
-
That is one of the worst uses of an analogy I have ever read. They don't describe at all why they selected the fruit fly and why you would want to give it a kick. Then completely abandon the analogy after word #3 of sentence #2.
A better analogy, I think, would be: Imagine an olympic judge. Someone dives into a pool and they hold up a 10 or 0. Usually it's dependent on performance of the athlete. But physicists have found the quantum equivalent of a typical bribe paid to an olympic judge. WHen you want to get a 10, you kick them some money and you get a 10. It repeats the 10 after the second payment you give it.
Or better yet:
Same judge, but this time they're blind. You whisper "Russia" in his ear and he holds up a 10. THe unfortunate part is, you need to say "Not Russia" or he'll keep holding up a 10 in perpetuity. So you say "Not Russia" and he's going to hold up a 0. When you say "Russia" again, you get a 10.Last edited by dxmnkd316; 12-06-2021, 11:51 AM.Code:As of 9/21/10: As of 9/13/10: College Hockey 6 College Football 0 BTHC 4 WCHA FC: 1
Originally posted by SanTropezMay your paint thinner run dry and the fleas of a thousand camels infest your dead deer.Originally posted by bigblue_dlI don't even know how to classify magic vagina smoke babies..Originally posted by KeplerWhen the giraffes start building radio telescopes they can join too.
Comment
-
Originally posted by dxmnkd316 View PostThat is one of the worst uses of an analogy I have ever read. They don't describe at all why they selected the fruit fly and why you would want to give it a kick. Then completely abandon the analogy after word #3 of sentence #2.
A better analogy, I think, would be: Imagine an olympic judge. Someone dives into a pool and they hold up a 10 or 0. Usually it's dependent on performance of the athlete. But physicists have found the quantum equivalent of a typical bribe paid to an olympic judge. WHen you want to get a 10, you kick them some money and you get a 10. It repeats the 10 after the second payment you give it.
Or better yet:
Same judge, but this time they're blind. You whisper "Russia" in his ear and he holds up a 10. THe unfortunate part is, you need to say "Not Russia" or he'll keep holding up a 10 in perpetuity. So you say "Not Russia" and he's going to hold up a 0. When you say "Russia" again, you get a 10.
It's the way the structure can be used in application where I get lost- where there's a randomness in quantum computers that is used for memory and/or logic. Randomness in a system where being known is important is a mystery to me.
Comment
-
The thing I had a problem with was later in the article when it said "if this sounds like perpetual motion" because the first time I read it I screamed, no, it doesn't, because you have to keep turning the damn laser on and off!
Science Daily is kind of like that joke about the New York Post: it's like being told the news by a random guy who watched the news.Cornell University
National Champion 1967, 1970
ECAC Champion 1967, 1968, 1969, 1970, 1973, 1980, 1986, 1996, 1997, 2003, 2005, 2010
Ivy League Champion 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1977, 1978, 1983, 1984, 1985, 1996, 1997, 2002, 2003, 2004, 2005, 2012, 2014, 2018, 2019, 2020
Comment
-
Interesting...
https://www.sci-nature.vip/2019/11/b...yf53bnjWbs&m=1
Obviously, independent review is forthcoming.the state of hockey is good
Comment
-
I don't know where, but someone once said, when it comes to betting on whether Einstein was right, take Einstein. I think it was the last time someone had a breakthrough that would have upended one of his theories. Turned out to be a false alarm. Anyways....
Given that we know so little (relatively speaking) about neutrinos, I suppose it could go either way. What a time to be alive.
Edit: lol. Back in 2011/2012 researchers announced similar potential findings that neutrinos were observed traveling faster than light.
Always bet on EinsteinLast edited by dxmnkd316; 12-17-2021, 06:28 PM.Code:As of 9/21/10: As of 9/13/10: College Hockey 6 College Football 0 BTHC 4 WCHA FC: 1
Originally posted by SanTropezMay your paint thinner run dry and the fleas of a thousand camels infest your dead deer.Originally posted by bigblue_dlI don't even know how to classify magic vagina smoke babies..Originally posted by KeplerWhen the giraffes start building radio telescopes they can join too.
Comment
-
Actually I just realized that article was from 2019?Code:As of 9/21/10: As of 9/13/10: College Hockey 6 College Football 0 BTHC 4 WCHA FC: 1
Originally posted by SanTropezMay your paint thinner run dry and the fleas of a thousand camels infest your dead deer.Originally posted by bigblue_dlI don't even know how to classify magic vagina smoke babies..Originally posted by KeplerWhen the giraffes start building radio telescopes they can join too.
Comment
-
Originally posted by dxmnkd316 View PostActually I just realized that article was from 2019?
Edit: I can see it in the URL. Never mind.
As penance, I'll share this article instead:
https://www.physics-astronomy.org/20...n73q_CGoP8&m=1
Last edited by state of hockey; 12-17-2021, 06:52 PM.the state of hockey is good
Comment
-
Originally posted by dxmnkd316 View PostI don't know where, but someone once said, when it comes to betting on whether Einstein was right, take Einstein. I think it was the last time someone had a breakthrough that would have upended one of his theories. Turned out to be a false alarm. Anyways....
Given that we know so little (relatively speaking) about neutrinos, I suppose it could go either way. What a time to be alive.
Edit: lol. Back in 2011/2012 researchers announced similar potential findings that neutrinos were observed traveling faster than light.
Always bet on EinsteinIf you don't change the world today, how can it be any better tomorrow?
- 1 like
Comment
-
I suspect most of these groundbreaking claims are accidentally leaked and blow up in a similar fashion.Code:As of 9/21/10: As of 9/13/10: College Hockey 6 College Football 0 BTHC 4 WCHA FC: 1
Originally posted by SanTropezMay your paint thinner run dry and the fleas of a thousand camels infest your dead deer.Originally posted by bigblue_dlI don't even know how to classify magic vagina smoke babies..Originally posted by KeplerWhen the giraffes start building radio telescopes they can join too.
Comment
Comment