The Problem With Uploading Your Consciousness | Cosmic Queries #105

The 'Big Rip' scenario, where the universe expands so rapidly that everything, down to quarks, is torn apart, requires dark energy to be a specific type called 'phantom energy'. This phantom energy would necessitate the existence of negative energy particles, which have never been observed. Therefore, based on current evidence, a Big Rip is not the probable end for the universe.

Charles Liu explains that the Big Rip is predicated on phantom energy, which would imply negative energy particles and phenomena like Alcubierre warp drives or wormholes, none of which have been detected or confirmed.

Initial assumptions, derived from Einstein's equations, posited the cosmological constant (representing dark energy) as unchanging. However, data from the Dark Energy Survey, analyzing 15 million galaxies, suggests that this constant might actually be changing over time. This implies that Einstein's general relativity, as a model of the universe, might be missing a time-dependent component.

Charles Liu shares insights from the American Astronomical Society meeting, stating that the Dark Energy Survey 'seems to show that what we have counted as dark energy, the cosmological constant, is probably not constant. It looks like it's actually changing.'

General relativity describes space-time and gravity on macroscopic scales, while quantum mechanics governs matter and energy at subatomic levels. These two foundational theories of physics are currently incompatible, particularly at extreme conditions like black holes or the early universe. Light, being both a particle and a wave with a maximum speed, is a critical element in both but doesn't bridge the gap.

Charles Liu explains that 'the math of quantum physics doesn't work really well when we're talking about space and time. And the mathematics of general relativity don't seem to work very well when we're trying to talk about little subatomic particles.' He mentions Jacob Barendis's hypothesis using statistical physics and chaos theory as a potential bridge.

The idea of uploading consciousness, as depicted in science fiction, relies on the ability to perfectly digitize and reproduce all information in a brain. However, if consciousness is quantum in nature, this is impossible due to quantum uncertainty. Reading a quantum state inherently alters or destroys it, meaning any 'copy' would be imperfect and immediately diverge from the original, creating a fundamentally different consciousness.

Charles Liu states, 'If you're in a quantum system, right, your qubits settle only when they are read and so destroyed. So you can never actually get a perfect copy of your brain.' Neil deGrasse Tyson adds, 'You cannot know the state of every particle down to the last particle that's running your brain because quantum physics prevents that knowledge.'

Public scientific ignorance, particularly when it leads to the rejection of well-established scientific consensus (e.g., vaccine safety, flat earth theory), has severe real-world consequences. This is distinct from simply 'not knowing' and instead involves actively asserting false information or distrusting experts based on unreliable sources.

Charles Liu highlights 'the idea that vaccines are dangerous' as the most saddening misconception, citing the measles outbreak in Samoa where children died after people stopped vaccinating. Neil deGrasse Tyson emphasizes, 'The problem is when they are ignorant of a truth and don't know they're ignorant of the truth and assert that they know what they're talking about.'