LHC experiments at CERN observe quantum entanglement at the highest energy yet

Funding and value of high‑energy colliders

• Some see LHC-style machines as essential: only very high energies reveal new particles and test the Standard Model at regimes where forces unify and “laws change.” Curiosity and long‑term spin‑offs are cited as justification.
• Others argue we may have hit diminishing returns: many concrete BSM theories have already been constrained by LHC; FCC (~€17B+) may rule out more parameter space (e.g., some WIMP models) but with no clear “Higgs‑like” target.
• Critics emphasize opportunity cost: for similar money you could fund multiple space missions, telescopes, or other physics/biomed projects with more obvious payoff.
• Supporters counter that in national budgets these are rounding errors, especially compared to defense, and that prioritizing only “safe, cheap” science blocks big breakthroughs.

Defense spending, globalization, and inequality

• One side claims strong militaries underpin global shipping, democracy, and high living standards; defense is seen as essential “insurance,” historically cheap relative to GDP.
• Others argue militaries primarily protect and extend unequal economic relations (colonialism, offshoring, coups), and that many harms cited stem from power imbalances rather than weak defense.
• Debate extends to whether globalization reduces or amplifies inequality, with references to rising middle classes vs extreme wealth concentration.
• Some note US wars costing trillions with dubious security benefits, and contrast the political ease of funding jets vs science.

Public support, ROI, and alternative directions

• Concern that particle physics soaks up scarce top STEM talent and money for marginal gains; suggestions include investing directly in enabling tech (e.g., superconducting magnets) or radically new accelerator concepts (space or muon colliders) instead of “LHC but bigger.”
• Others reject the idea of a fixed science pie and see arguing over intra‑science reallocations as defeatist while defense and other spending are barely questioned.

Quantum entanglement: basics and misconceptions

• Multiple replies push back on pop‑culture uses of entanglement (telepathy, text “synchronicity”): scale is microscopic, preparation highly specific, and biological implementations fantastically implausible.
• Explanations emphasize:
  • Entanglement is about non‑separable joint states and conservation laws (e.g., total spin) in a closed system.
  • You can’t treat it as “pre‑stored bits” in two brains or boxes without conflicting with experiments that violate Bell inequalities and rule out simple hidden‑variable pictures.
  • Observed “coincidences” in daily life are better explained by priors, shared habits, and cognitive biases (confirmation, frequency illusion).

Why entanglement cannot send faster‑than‑light messages

• Several commenters struggle with this; others provide layered explanations:
  • Measurement outcomes on each side are individually random; you cannot choose them to encode a message.
  • Correlations only show up when comparing many results over a classical channel, which is limited by light speed.
  • Intuitions using apples/coins capture “no communication,” but miss that in quantum mechanics the choice of measurement basis affects correlations in ways impossible classically.
  • Thought experiments like synchronized random coin flips illustrate that shared randomness can coordinate actions without transmitting new information.

Is entanglement “real” or just bookkeeping?

• One line of questioning wonders if entanglement is merely a semantic artifact of how we write wavefunctions; adding extra particles or choosing different decompositions seems to change “what is entangled.”
• Responses:
  • Formally, “entangled” means the joint state cannot be factored into a product of subsystem states; adding an uncorrelated particle multiplies the state but doesn’t alter existing entanglement.
  • Operationally, entanglement is detected through tasks/statistics: violation of Bell inequalities, quantum teleportation, and other protocols that only work if genuinely entangled pairs are present.
  • You can’t certify a single pair in one shot due to probabilistic measurement, but repeated experiments converge, similar to any probabilistic property in physics.

Data openness and public engagement

• One suggestion: include explicit data URLs and query recipes in papers so non‑experts can reproduce event selections and “play” with LHC data.
• CERN does publish open data, but critics find it hard to discover and not low‑barrier for newcomers; they argue better didactics could reduce “ivory tower” perceptions and help sustain funding.
• Others are skeptical that raw‑data access meaningfully shifts mass public or political support compared with more visceral, consumer‑facing tech (e.g., chatbots).