Re: [Vo]:Article: Chiral magnetic effect generates quantum current

[John Berry]

Ok, wow!

So I have for about 20 years been collecting evidence of parallel electric
and magnetic fields creating an anomalous voltage (they don't say voltage,
but mention extracting energy from Dirac sea and a powerful increase in
conductivity).
I have been working with chiral effects for about 5 years, this paper is
perfectly echoing my work.

I can give you a decent size list of experiments with electric current
generating an anomalous preferred direction when current flows along a
magnetic field like this.

Also the equal left and right handed Charity!  Yes I have found that too.
And then it goes on to talk about massless particles that are like
electrons!

This just sounds like an echo chamber of my own work.

John (call me paranoid, but article below in case it disappears or gets
modified)


Scientists at the U.S Department of Energy's (DOE) Brookhaven National
Laboratory and Stony Brook University have discovered a new way to generate
very low-resistance electric current in a new class of materials. The
discovery, which relies on the separation of right- and left-"handed"
particles, points to a range of potential applications in energy, quantum
computing, and medical imaging, and possibly even a new mechanism for
inducing superconductivity—the ability of some materials to carry current
with no energy loss.

The material the scientists worked with, zirconium pentatelluride, has a
surprising trait: When placed in parallel electric and magnetic fields, it
responds with an imbalance in the number of right- and left-handed
particles—a chiral imbalance. That imbalance pushes oppositely charged
particles in opposite directions to create a powerful electric current.

This "chiral magnetic effect" had long been predicted theoretically, but
never observed definitively in a materials science laboratory at the time
this work was done.

In fact, when physicists in Brookhaven's Condensed Matter Physics &
Materials Science Department (CMP) first measured the significant drop
in electrical resistance, and the accompanying dramatic increase in
conductivity, they were quite surprised. "We didn't know this large
magnitude of 'negative magnetoresistance' was possible," said Qiang Li, a
physicist and head of the advanced energy materials group in the department
and a co-author on a paper describing these results just published in the
journal *Nature Physics*. But after teaming up with Dmitri Kharzeev, the
head of the RIKEN-BNL theory group at Brookhaven and a professor at Stony
Brook, the scientists had an explanation.

Kharzeev had explored similar behavior of subatomic particles in the
magnetic fields created in collisions at the Lab's Relativistic Heavy Ion
Collider (RHIC), a DOE Office of Science User Facility where nuclear
physicists explore the fundamental building blocks of matter. He suggested
that in both the RHIC collisions and zirconium pentatelluride, the
separation of charges could be triggered by a chiral imbalance.

To test the idea, they compared their measurements with the mathematical
predictions of how powerful the increase in conductivity should be with
increasing magnetic field  strength.

"We looked at the data and we said, 'Gee, that's it!' We tested six
different samples and confirmed that no matter how you do it, it's there as
long as the magnetic field is parallel to the electrical current. That's
the smoking gun," Li said.

*Going Chiral*

Right- or left-handed chirality is determined by whether a particle's spin
is aligned with or against its direction of motion. In order for chirality
to be definitively established, particles have to behave as if they are
nearly massless and able to move as such in all three spatial directions.

While free-flowing nearly massless particles are commonly found in the
quark-gluon plasma created at RHIC, this was not expected to occur in
condensed matter. However, in some recently discovered materials, including
"Dirac semimetals"—named for the physicist who wrote the equations to
describe fast-moving electrons—nearly massless "quasiparticle" versions of
electrons (and positively charged "holes") propagate through the crystal in
this free manner.

Some aspects of this phenomenon, namely the linear dependence of the
particles' energy on their momentum, can be directly measured and
visualized using angle-resolved photoemission spectroscopy (ARPES).

"On first sight, zirconium pentatelluride did not even look like a 3D
material," said Brookhaven physicist Tonica Valla, who performed the
measurements with collaborators at the Advanced Light Source (ALS) at
Lawrence Berkeley National Laboratory and at Brookhaven's National
Synchrotron Light Source (NSLS, https://www.bnl.gov/ps/nsls/about-NSLS.asp)—two
additional DOE Office of Science User Facilities. "It is layered, similar
to graphite, so a quasi-2D electronic structure would be more expected.
However, as soon as we did the first ARPES measurements, it was clear that
the 

RE: [Vo]:Article: Chiral magnetic effect generates quantum current

[MarkI-ZeroPoint]

One cannot understand (super)conductivity unless physical orientation is also 
included.  I.e., I would be willing to bet that superconductivity occurs when 
the current ‘flow’ is EXACTLY perpendicular to the magnetic axes.  This is EASY 
to accomplish in graphene (or other single-layer materials), but once you get a 
few layers the interactions between atoms result in non-alignment of magnetic 
dipoles, it becomes nearly impossible to achieve the kind of alignments 
necessary for superconductivity unless one removes most of the heat quanta from 
the material; is it any wonder that quantum mechanics can ONLY achieve results 
based on probabilities?

-mark

 

From: John Berry [mailto:berry.joh...@gmail.com] 
Sent: Monday, February 08, 2016 5:51 PM
To: vortex-l@eskimo.com
Subject: Re: [Vo]:Article: Chiral magnetic effect generates quantum current

 

Ok, wow!

 

So I have for about 20 years been collecting evidence of parallel electric and 
magnetic fields creating an anomalous voltage (they don't say voltage, but 
mention extracting energy from Dirac sea and a powerful increase in 
conductivity).

I have been working with chiral effects for about 5 years, this paper is 
perfectly echoing my work.

 

I can give you a decent size list of experiments with electric current 
generating an anomalous preferred direction when current flows along a magnetic 
field like this.

 

Also the equal left and right handed Charity!  Yes I have found that too.

And then it goes on to talk about massless particles that are like electrons!

 

This just sounds like an echo chamber of my own work.

 

John (call me paranoid, but article below in case it disappears or gets 
modified)



 

Scientists at the U.S Department of Energy's (DOE) Brookhaven National 
Laboratory and Stony Brook University have discovered a new way to generate 
very low-resistance electric current in a new class of materials. The 
discovery, which relies on the separation of right- and left-"handed" 
particles, points to a range of potential applications in energy, quantum 
computing, and medical imaging, and possibly even a new mechanism for inducing 
superconductivity—the ability of some materials to carry current with no energy 
loss.

The material the scientists worked with, zirconium pentatelluride, has a 
surprising trait: When placed in parallel electric and magnetic fields, it 
responds with an imbalance in the number of right- and left-handed particles—a 
chiral imbalance. That imbalance pushes oppositely charged particles in 
opposite directions to create a powerful electric current.

This "chiral magnetic effect" had long been predicted theoretically, but never 
observed definitively in a materials science laboratory at the time this work 
was done.

In fact, when physicists in Brookhaven's Condensed Matter Physics & Materials 
Science Department (CMP) first measured the significant drop in electrical 
resistance, and the accompanying dramatic increase in conductivity, they were 
quite surprised. "We didn't know this large magnitude of 'negative 
magnetoresistance' was possible," said Qiang Li, a physicist and head of the 
advanced energy materials group in the department and a co-author on a paper 
describing these results just published in the journal Nature Physics. But 
after teaming up with Dmitri Kharzeev, the head of the RIKEN-BNL theory group 
at Brookhaven and a professor at Stony Brook, the scientists had an explanation.

Kharzeev had explored similar behavior of subatomic particles in the magnetic 
fields created in collisions at the Lab's Relativistic Heavy Ion Collider 
(RHIC), a DOE Office of Science User Facility where nuclear physicists explore 
the fundamental building blocks of matter. He suggested that in both the RHIC 
collisions and zirconium pentatelluride, the separation of charges could be 
triggered by a chiral imbalance.

To test the idea, they compared their measurements with the mathematical 
predictions of how powerful the increase in conductivity should be with 
increasing  <http://phys.org/tags/magnetic+field/> magnetic field strength.

"We looked at the data and we said, 'Gee, that's it!' We tested six different 
samples and confirmed that no matter how you do it, it's there as long as the 
magnetic field is parallel to the electrical current. That's the smoking gun," 
Li said.

Going Chiral

Right- or left-handed chirality is determined by whether a particle's spin is 
aligned with or against its direction of motion. In order for chirality to be 
definitively established, particles have to behave as if they are nearly 
massless and able to move as such in all three spatial directions.

While free-flowing nearly massless particles are commonly found in the 
quark-gluon plasma created at RHIC, this was not expected to occur in condensed 
matter. However, in some recently discovered materials, including "Dirac 
semimetals"—named for the physicis

[Vo]:Article: Chiral magnetic effect generates quantum current

[Jack Cole]

Scientists at the U.S Department of Energy's (DOE) Brookhaven National
Laboratory and Stony Brook University have discovered a new way to generate
very low-resistance electric current in a new class …

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