| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
16 Nov 2004 09:03:18 PM |
| Object: |
Equivalence principle passes atomic test |
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
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| User: "" |
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| Title: Re: Equivalence principle passes atomic test |
17 Nov 2004 10:22:40 AM |
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Sam Wormley <swormley1@mchsi.com> wrote in message news:<Wbzmd.346888$wV.95445@attbi_s54>...
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
A falling object to test the force of gravity relative to mass is the
stated experimental summary.
An implied equivalence of the acceleration's independence with mass is
unstated in the summary.
Making the unique aspect the usage of atoms and their interference.
Free falling atoms to test the rate of falling while they act
spooky like in a local state is the real quantum mechanical test.
Meaning the subject is well understood and spooky stuff is just
normal physics. These are not photons and interference of masses
is the origin of the local system.
So, Einstein's brand of locality is definable in this system.
A wave function defines the system! And the only parameter to
test Einsteins rather the Copenhagen wave function is the time to
fall.
A precise falling time, as in a small pulse of atoms, would allow
the size of the local wave function to be stated. And then the
"phase" could be altered to find the non-interfering "phase".
And where the test is invalid the system would be nonlocal.
And here is where the spin property would be tested. As in the
EPR spin. And the local system turned on and off to allow
Einsten's test to be performed! A real nice thing to see!
Douglas Eagleson
Gaithersburg, MD USA
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| User: "Mike" |
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| Title: Re: Equivalence principle passes atomic test |
17 Nov 2004 09:39:28 AM |
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Sam Wormley <swormley1@mchsi.com> wrote in message news:<Wbzmd.346888$wV.95445@attbi_s54>...
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
Hey ****head, if macro object fall at the sam rate with an accuracy of
10^-13, who cares about particle falling rates with an accuracy in the
order of 10^-7?
They should have read Galileo before even starting wasting EU tax
money. Idiots.
Mike
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| User: "Dirk Van de moortel" |
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| Title: Re: Equivalence principle passes atomic test |
17 Nov 2004 12:16:20 PM |
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"Mike" <eleatis@yahoo.gr> wrote in message news:9c1b39be.0411170739.49311679@posting.google.com...
Sam Wormley <swormley1@mchsi.com> wrote in message news:<Wbzmd.346888$wV.95445@attbi_s54>...
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
Hey ****head, if macro object fall at the sam rate with an accuracy of
10^-13, who cares about particle falling rates with an accuracy in the
order of 10^-7?
They should have read Galileo before even starting wasting EU tax
money. Idiots.
Mike Undeniable Bill Smith, you need a new song and a new
internet provider ;-)
Dirk Vdm
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| User: "Uncle Al" |
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| Title: Re: Equivalence principle passes atomic test |
17 Nov 2004 10:59:59 AM |
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Mike wrote:
Sam Wormley <swormley1@mchsi.com> wrote in message news:<Wbzmd.346888$wV.95445@attbi_s54>...
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
Hey ****head, if macro object fall at the sam rate with an accuracy of
10^-13, who cares about particle falling rates with an accuracy in the
order of 10^-7?
They should have read Galileo before even starting wasting EU tax
money. Idiots.
Mike
Right answer, wrong reasons, idiot. Education would go a long way to
ameliorating your profound ignorance. To restate,
They found the Equivalence Principle (EP) held to 1.2 x 10^(-7)
difference/average. Note that thermodynamics demands the EP hold to 1
part in 10^(-11) or you could trivially measure an EP violation simply
by dropping the paired masses and noting a differential mgh by
temperature. (Drop the system double-capsuled in the Bremen vacuum
tower). Differential measurements are exquisitely sensitive
(Wheatstone bridge), and a battery of paired micro-thermocouples or
micro-thermistors on a chip is straightforward to fabricate.
Differential static Cp is even easier to measure with the same chip.
Concrete example: The EP can be tested for parity violation to 3 in
10^(-13) - 400,000 times as sensitive as the cited rubidium experiment
- simply by melting some benzil,
http://www.mazepath.com/uncleal/eotvos.htm#b35
Doing the heat of fusion of benzil good to (+/-)10% is a mercyhump
undergrad P-chem lab. That would be more than twice the accuracy
needed. A modern differential calorimeter is good to (+/-)1% on the
first shot. Benzil is used to calibrate calorimeters. It is an
optimum example of an extremal pair of opposite parity test masses.
In any case, the rubidium experiment was a default null.
http://www.mazepath.com/uncleal/eotvos.htm#b21
Nuclear properties are coupled to internal symmetries via Noether's
theorem. Internal symmetries' observables (gauged using fiber bundle
theory, e.g., charge conjugation) transform fields amongst themselves
leaving physical states (translation, rotation) invariant. A local
gauge transformation always exists to make the local gauge-field
vanish. Two vector potentials differing only by a gauge
transformation give the same field. EP tests opposing properties
coupled to internal symmetries are empirical first order default
nulls.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "Uncle Al" |
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| Title: Re: Equivalence principle passes atomic test |
17 Nov 2004 10:58:34 AM |
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Sam Wormley wrote:
Equivalence principle passes atomic test (Nov 16)
http://physicsweb.org/article/news/8/11/8
Physicists in Germany have used an atomic interferometer to perform the
most accurate ever test of the equivalence principle at the level of
atoms. Sebastian Fray and colleagues at the Max Planck Institute for
Quantum Optics in Garching and the universities of Munich and Tuebingen
compared the acceleration of two isotopes of rubidium in the Earth's
gravitational field (arXiv.org/abs/physics/0411052). As expected the
atoms accelerated at the same rate.
They found the Equivalence Principle (EP) held to 1.2 x 10^(-7)
difference/average. Note that thermodynamics demands the EP hold to 1
part in 10^(-11) or you could trivially measure an EP violation simply
by dropping the paired masses and noting a differential mgh by
temperature. (Drop the system double-capsuled in the Bremen vacuum
tower). Differential measurements are exquisitely sensitive
(Wheatstone bridge), and a battery of paired micro-thermocouples or
micro-thermistors on a chip is straightforward to fabricate.
Differential static Cp is even easier to measure with the same chip.
Concrete example: The EP can be tested for parity violation to 3 in
10^(-13) - 400,000 times as sensitive as the cited rubidium experiment
- simply by melting some benzil,
http://www.mazepath.com/uncleal/eotvos.htm#b35
Doing the heat of fusion of benzil good to (+/-)10% is a mercyhump
undergrad P-chem lab. That would be more than twice the accuracy
needed. A modern differential calorimeter is good to (+/-)1% on the
first shot. Benzil is used to calibrate calorimeters. It is an
optimum example of an extremal pair of opposite parity test masses.
In any case, the rubidium experiment was a default null.
http://www.mazepath.com/uncleal/eotvos.htm#b21
Nuclear properties are coupled to internal symmetries via Noether's
theorem. Internal symmetries' observables (gauged using fiber bundle
theory, e.g., charge conjugation) transform fields amongst themselves
leaving physical states (translation, rotation) invariant. A local
gauge transformation always exists to make the local gauge-field
vanish. Two vector potentials differing only by a gauge
transformation give the same field. EP tests opposing properties
coupled to internal symmetries are empirical first order default
nulls.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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