On bounding group-velocity excess in anomalously dispersive media
A survey of the conditions under which group velocity formalisms break down, and why most claimed superluminal results reduce to pulse-reshaping artifacts.
About the institute
ILSP began as an informal reading group in 2019 and now operates as an independent, unaffiliated research collective. We hold no university appointment and accept no directed funding — work is published as preprints, reviewed informally within the group before release.
Selected working papers
A survey of the conditions under which group velocity formalisms break down, and why most claimed superluminal results reduce to pulse-reshaping artifacts.
An attempt to formalize which superluminal toy models remain logically consistent once causal ordering constraints are reintroduced.
A literature review of barrier traversal time anomalies in quantum tunneling, and the disagreements that remain unresolved.
Why the group treats failed replications and ruled-out models as the core output, not a byproduct, of the research program.
People
Causal structure, formal methods
Dispersion theory, optics
Quantum tunneling models
We review unsolicited inquiries
A note on scope
This is theoretical work, not engineering. We are not building anything, and we do not claim any experimental confirmation of superluminal signaling. The value of the program, as we see it, is in being precise about what current physics rules in and rules out — and being honest when the answer is "we don't know yet."