[General] To Infinity and Beyond: zero phase index?

[John Williamson]

David,

I do not get what you mean about SU(2) having a velocity. Is that what you are saying or am I just being dumb?

In any event in my book there is - and should not be - any "spooky action at a distance. Whatever that is.

Regards, John W.
________________________________
From: General [general-bounces+john.williamson=glasgow.ac.uk at lists.natureoflightandparticles.org] on behalf of davidmathes8 at yahoo.com [davidmathes8 at yahoo.com]
Sent: Monday, October 26, 2015 2:47 AM
To: Nature of Light and Particles - General Discussion
Subject: Re: [General] To Infinity and Beyond: zero phase index?

Martin

So to pick up this old threadfrom a week ago...

Agreed that phase velocity can have "...any velocity, +/- infinity."

However, the assumption is a EM U(1) symmetry. SU(2) and higher may be a better fit for not only what we observe, but what may be possible although not yet observed.

Non locality or spooky action at a distance should also have a velocity. This phenomena may not be EM. However, when discussing the speed of light, any velocity should be compared to light-like velocity.

What is the velocity or velocity range of entanglement? There appears to be an upper limit but beyond that of c.
Bounding the speed of ‘spooky action at a distance<http://arxiv.org/pdf/1303.0614v1.pdf>

David








________________________________
From: "Mark, Martin van der" <martin.van.der.mark at philips.com>
To: "davidmathes8 at yahoo.com" <davidmathes8 at yahoo.com>; Nature of Light and Particles - General Discussion <general at lists.natureoflightandparticles.org>
Sent: Tuesday, October 20, 2015 4:53 AM
Subject: Re: [General] To Infinity and Beyond: zero phase index?

David and all,
Just for the record, there are three kinds of velocity for electromagnetic waves:
1)      The phase velocity, it governs refraction and as you may guess, the refractive index, n, is the material property related to it. May have any velocity, +/- infinity.
v_phase = omega/k
2)      The group velocity, this how fast a pulse of light moves and it is always slower than c.
v_group = domega/dk
3)      The energy transport velocity, relevant for resonant structures, always slower than c
v_energy = see Amsterdam effect and the book by Brillouin on propagation
Then (as indicated in the first point), on top of this there is the possibility of negative epsilon and mu leading to negative refractive index. This may happen at a resonance (small bandwidth, limited response time), and is associated with so-called perfect lenses and optical cloaks. Can be made as a meta material. It amplifies the near-field (longitudinal component).
I hope this helps some.
Cheers, Martin

Dr. Martin B. van der Mark
Principal Scientist, Minimally Invasive Healthcare

Philips Research Europe - Eindhoven
High Tech Campus, Building 34 (WB2.025)
Prof. Holstlaan 4
5656 AE  Eindhoven, The Netherlands
Tel: +31 40 2747548



From: General [mailto:general-bounces+martin.van.der.mark=philips.com at lists.natureoflightandparticles.org] On Behalf Of davidmathes8 at yahoo.com
Sent: dinsdag 20 oktober 2015 1:26
To: Nature of Light and Particles - General Discussion; Richard Gauthier; Chip Akins
Subject: [General] To Infinity and Beyond: zero phase index?

Rich, Chip, John W, Martin et al
I've wondered if the photon or quanta within the confines of an electron could really travel at FTL velocities.
Indeed, one of the parametric models Richard has proposed does fit known experiments to date.

So here is an interesting tool for experimentalists: an on-chip zero-index metamaterial.
 http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2015.198.html
"This novel on-chip metamaterial platform opens the door to exploring the physics of zero index and its applications in integrated optics."

Best

David

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