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2022-10-26: Why Did Quantum Entanglement Win the Nobel Prize in Physics?

  • 16:23: ... we’ll be trying to send actual images rather than simple numerical  measurements and status ...

2022-08-17: What If Dark Energy is a New Quantum Field?

  • 06:25: ... universe we get a different number. The latter is from Planck satellite measurements of the cosmic microwave background. The current thinking is that one of ...
  • 13:27: ... fully operational James Webb Space Telescope will help by pushing our measurements of the expansion rate back billions of years from the current supernova ...

2022-07-20: What If We Live in a Superdeterministic Universe?

  • 02:33: The results of your measurements are plucked from the wavefunction of whatever you’re observing.
  • 06:10: When the two compare results, they will see correlations between the spin measurements because the original spin directions were correlated.
  • 09:22: The Bell test results are weird because Bob’s measurements turn out to be inexplicably correlated with Alice’s choices.
  • 10:02: That’s the statistical independence of the measurements.
  • 10:24: ... between Alice and Bob’s supposedly free decisions of how they make their measurements, and the states of the measured ...
  • 09:22: The Bell test results are weird because Bob’s measurements turn out to be inexplicably correlated with Alice’s choices.

2022-04-20: Does the Universe Create Itself?

  • 00:59: ... but it seems we can’t even assign physicality to the world between measurements. As Niels Bohr put it “no phenomenon is a phenomenon, until it is an ...

2022-03-08: Is the Proxima System Our Best Hope For Another Earth?

  • 08:18: Followup observations in January this year somewhat solidified the measurements of Proxima D.

2022-02-16: Is The Wave Function The Building Block of Reality?

  • 10:48: ... Experiments are approaching the masses necessary to make such direct measurements, but they’re not quite there ...

2021-10-05: Why Magnetic Monopoles SHOULD Exist

  • 04:37: ... that the equations of quantum mechanics had a particular symmetry - the measurements they predict are unaltered by changes in one simple property - the phase ...

2021-09-21: How Electron Spin Makes Matter Possible

  • 08:21: ... never, ever observe Psi - all we can do is map Psi^2 by making multiple measurements. The unobservability of Psi is critical to this whole explanation, so ...

2021-08-18: How Vacuum Decay Would Destroy The Universe

  • 09:38: ... can determine the shape of the Higgs field with   precise measurements of the particles  that gain their mass from the Higgs.   ...

2021-08-10: How to Communicate Across the Quantum Multiverse

  • 03:30: ... changes over space and time - and so it should completely determine the measurements we can make of that quantum system. But if our observations are 100% ...

2021-08-03: How An Extreme New Star Could Change All Cosmology

  • 05:39: ... with our measurements for temperature and brightness, we get a radius for Zee of 2140 ...
  • 11:52: ... there does seem to be a disagreement between the supernova dark energy measurements and the measurements from the cosmic microwave background - again, ...

2021-07-13: Where Are The Worlds In Many Worlds?

  • 04:04: ... measurements appear to be randomly selected based on the current state of the ...
  • 04:16: We never see the wavefunction - we only see measurements - we pluck our reality from this fantastically complex structure.

2021-07-07: Electrons DO NOT Spin

  • 03:48: ... assume electrons have a maximum possible size given by the best  measurements of the day, then their surfaces would have to be moving faster than ...

2021-05-25: What If (Tiny) Black Holes Are Everywhere?

  • 13:36: ... at how the Heisenberg uncertainty principle can be gamed to improve measurements - in particular in gravitational wave ...

2021-05-19: Breaking The Heisenberg Uncertainty Principle

  • 00:47: ... measurements have become so precise that we’re starting to run up against the ...
  • 01:05: Today we’re going to see how the uncertainty principle can be hacked to make measurements more precisely than should ever be possible.
  • 10:17: ... the limit beyond what we thought possible to force ever more certain measurements of this uncertain space ...

2021-04-07: Why the Muon g-2 Results Are So Exciting!

  • 02:22: QED predicts the value for the electrons g-factor that matches experimental measurements to one part in a billion.
  • 02:44: Starting in 20 years ago, experimental measurements of the Muon g-factor did not agree with the QED calculation.

2021-03-23: Zeno's Paradox & The Quantum Zeno Effect

  • 07:23: In theory, if these “measurements” are fast enough they should stop the wavefunction from evolving.
  • 14:22: ... therefore be resolved by finding an error in either the CMB or supernova measurements, but also by finding one of the assumptions in the CMB calculation is ...

2021-03-16: The NEW Crisis in Cosmology

  • 00:22: ... we have two extremely careful, increasingly precise measurements of how fast the universe   is expanding which should agree ...
  • 02:07: ... the redshifts. It depends   on a long chain of distance measurements that we call the cosmic distance ladder. First you ...
  • 02:36: ... distance measurements were based on a method pioneered by Henrietta Swan ...
  • 03:55: ... With its discovery it suddenly became VERY important to perfect our measurements of the   expansion rate - both to confirm dark ...
  • 06:22: ... a giant space ruler. Ultimately, refining the supernova distance measurements comes   down to refining parallax measurements,  and ...
  • 08:03: ... so it was that in 1912 Henrietta Swan Leavitt used parallax measurements of Cepheids in the   Milky Way to turn these stars into ...
  • 06:22: ... a giant space ruler. Ultimately, refining the supernova distance measurements comes   down to refining parallax measurements,  and that’s what we’ve ...
  • 08:03: ... few Cepheids that are close enough for   parallax measurements. Things started to get better when we put telescopes in space - ...
  • 06:22: ... distance measurements comes   down to refining parallax measurements,  and that’s what we’ve finally ...
  • 08:03: ... effect of Earth’s atmosphere it’s possible to make better position measurements.   The Hubble Space Telescope has done great work here, and so has the ...

2021-01-12: What Happens During a Quantum Jump?

  • 01:02: That proof required precision measurements that didn’t exist in Schrodinger’s time.

2020-07-28: What is a Theory of Everything: Livestream

  • 00:00: ... really nailing down the cosmological constant really doing precision measurements in all different types of lower energy machines right because the ...

2020-07-20: The Boundary Between Black Holes & Neutron Stars

  • 08:43: ... direct measurements of neutron star masses come from pulsars - cosmic lighthouses that ...

2020-07-08: Does Antimatter Explain Why There's Something Rather Than Nothing?

  • 08:50: ... the more tests they can conduct on it, and so the more precise their measurements will ...

2020-05-27: Does Gravity Require Extra Dimensions?

  • 09:47: ... the beginning of a grand tradition in physics of making high-precision measurements to learn about the fundamental nature of the ...
  • 11:19: The inverse square law seems to hold down to the current limits of our measurements.

2020-04-28: Space Time Livestream: Ask Matt Anything

  • 00:00: ... not say one word when zero words would do there was also a unit of measurements in in Cambridge for the rate of speech where one Dirac equaled one ...

2020-03-16: How Do Quantum States Manifest In The Classical World?

  • 13:47: ... object positions, feline mortality statuses, even the results of quantum measurements - do NOT exist in the underlying quantum objects. Quantum objects remain ...

2020-02-11: Are Axions Dark Matter?

  • 03:02: ... and negative charges - an electric dipole field. Our very sensitive measurements have found that no such field exists- or if it is there then it’s a ...

2019-12-02: Is The Universe Finite?

  • 02:06: ... today - particularly the modern expansion rate determined from supernova measurements. ...
  • 11:51: The tension between the Planck results and other cosmological measurements seems to be growing.

2019-07-25: Deciphering The Vast Scale of the Universe

  • 04:36: ... Andromeda Nebula became the Andromeda galaxy and with more distance measurements it became clear that all spiral nebulae were island universes of their ...

2019-07-15: The Quantum Internet

  • 08:54: It’s pretty much impossible to do all the transmissions, entanglements, and measurements in perfect synchrony.

2019-05-09: Why Quantum Computing Requires Quantum Cryptography

  • 08:51: If someone... not Eve ... Werner, intercepted these messages, which were after all sent on a public channel, and did his own measurements.
  • 09:37: Once they have done this test and verified that the information wasn’t intercepted, they discard the non-matching measurements and keep the rest.
  • 11:45: ... in a different basis to its entangled partner, the results of the measurements will be correlated in a way that depends on the choice of measurement ...
  • 12:23: Because they’re entangled, the outcome of Alberts and Niels measurements should be correlated in a very particular way defined by Bell’s theorem.
  • 12:40: But it was probably that Werner dude – he must have made some measurements and disentangled the particles en route.

2019-04-10: The Holographic Universe Explained

  • 17:02: Measurements of the geometry of the universe indicate flatness, but we may never know whether it's truly flat, or just flat as far as we can see.

2019-03-28: Could the Universe End by Tearing Apart Every Atom?

  • 13:18: ... evidence that dark energy may be increasing in strength based on measurements of distant ...

2019-03-20: Is Dark Energy Getting Stronger?

  • 05:21: It may be an issue with how we determine the starting conditions of the universe, or it may be our measurements of supernovae.
  • 05:38: But before we throw away the textbooks, perhaps we should think about where the measurements might have gone wrong.
  • 13:17: But the most likely explanation is still that concordance, Lambda-CDM is right, and there’s an issue with the measurements or calculations.
  • 13:36: ... there are still relatively few very distant quasars with good X-ray measurements, so maybe the random variations in the UV-to-X-ray ratio by chance to ...

2019-02-20: Secrets of the Cosmic Microwave Background

  • 11:14: ... the first peak to measure the baryon content of the Universe And those measurements tell use that that baryons constitute only about 5% of the total energy ...

2019-02-07: Sound Waves from the Beginning of Time

  • 00:42: The impossibly vast distances made accurate measurements near impossible.
  • 09:08: ... gives distance. And with careful measurements of galaxies' positions on the sky, a redshift survey can produce a ...
  • 10:47: ... then, the WiggleZ BAOs and 6dF surveys have improved the measurements/ Now, there was a powerful driving motivation to make this measurement ...
  • 11:00: Dark energy was first discovered by using distant supernovae as distance measurements- to track the rate of expansion of the universe.

2019-01-24: The Crisis in Cosmology

  • 00:49: Combined with the Doppler shift velocity measurements of Vesto Slipher,...
  • 06:37: ...or there is a big problem, with either our supernova measurements...
  • 10:57: ...in either the supernova or Planck measurements.
  • 14:03: ...the gravitational lensing measurements of dark matter...

2018-10-03: How to Detect Extra Dimensions

  • 14:10: This only works if the number of measurements you need to make is finite.
  • 14:14: For the simplest attempts at quantum gravity, you need infinite measurements.

2018-09-20: Quantum Gravity and the Hardest Problem in Physics

  • 10:23: They can be brought back to reality by actual physical measurements of a few simple numbers in a process called renormalization.
  • 10:53: But unlike other quantum field theories, there are no simple measurements you can do to renormalize those corrections.
  • 11:00: In fact, you would need infinite measurements to do so.

2018-08-15: Quantum Theory's Most Incredible Prediction

  • 05:58: So measurements say the G factor is around 2.

2018-08-01: How Close To The Sun Can Humanity Get?

  • 04:33: It'll make detailed measurements of their kinematic properties like velocity temperature and density.

2018-07-04: Will A New Neutrino Change The Standard Model?

  • 09:35: This result is in conflict with some other measurements.

2018-05-23: Why Quantum Information is Never Destroyed

  • 08:35: And in principle, make enough measurements and you can extract all of the information from a wave function.

2018-05-16: Noether's Theorem and The Symmetries of Reality

  • 10:39: But Gaia is really optimized for extreme astrometry-- phenomenally accurate position data that actually allows measurements of velocities.
  • 11:28: Simon Clarkston asks how Gaia can take such precise measurements.

2018-05-09: How Gaia Changed Astronomy Forever

  • 02:07: Coupled with its incredible position measurements, this enables Gaia to measure distances to stars as far away as the galactic center.
  • 05:07: ... putting such complete velocity measurements together with our position data, it's now possible to model the dynamics ...
  • 06:27: ... by constraining the distances to stars, we can get better measurements on the sizes of those stars, and thus, also get better measures of the ...
  • 08:10: It does this by providing better distance measurements to those pulsars.

2018-03-28: The Andromeda-Milky Way Collision

  • 03:01: Hubble went on to combine distance measurements to many galaxies with measurements of their velocities to discover the expansion of the universe.
  • 03:32: But Doppler shift measurements only gives the line of sight velocity, the component of the galaxy's motion directly towards or away from us.
  • 10:25: ... one thing, there's the consistency of the dark matter mass measurements of galaxies and galaxy clusters from gravitational lensing versus ...

2017-11-29: Citizen Science + Zero-Point Challenge Answer

  • 02:32: This international database houses over 20 million variable star brightness measurements dating back over 100 years.

2017-11-22: Suicide Space Robots

  • 01:57: These measurements would have been impossible outside Venus' thick atmosphere.
  • 08:58: ... 1 still sends faint radio signals, bringing us our first and only direct measurements from beyond our home ...

2017-11-08: Zero-Point Energy Demystified

  • 01:26: This means we should take the idea of zero-point energy seriously and are justifiably perplexed at the mismatch between theory and measurements.

2017-10-19: The Nature of Nothing

  • 06:57: They live in the interval between measurements of real particles.

2017-08-24: First Detection of Life

  • 00:12: To detect life on a planet based on measurements by a space probe.

2017-07-12: Solving the Impossible in Quantum Field Theory

  • 09:44: ... measurement we make actually includes some of this self-energy, so our measurements are never of the fundamental or bare mass of the electron, and that is ...
  • 10:56: It can only make predictions of other properties relative to your lab measurements.

2017-07-07: Feynman's Infinite Quantum Paths

  • 00:00: ... properties, paths, or events that could reasonably occur between measurements do ...

2017-05-03: Are We Living in an Ancestor Simulation? ft. Neil deGrasse Tyson

  • 05:43: That's debatable, because the environment needs to be perfectly consistent with respect to all measurements made by all brains in that environment.

2017-01-11: The EM Drive: Fact or Fantasy?

  • 03:24: The Eagle Works result is the latest in several attempts to reproduce Shawyer's measurements, none of which are close to being conclusive.

2016-11-09: Did Dark Energy Just Disappear?

  • 07:28: Those blue ovals represent the ranges of combinations of matter and dark energy that are consistent with the new supernova measurements.
  • 10:20: The 1, 2, and 3-sigma contours based on the CMB measurements.
  • 10:33: When you mathematically combine the certainty contours of two completely independent measurements they give you a much tighter range of possibilities.

2016-10-26: The Many Worlds of the Quantum Multiverse

  • 03:55: ... the double-slit experiment and spookily correlated quantum entanglement measurements. ...

2016-09-21: Quantum Entanglement and the Great Bohr-Einstein Debate

  • 03:49: ... the entire entangled wave function, and so affects the results of measurements of the other ...
  • 06:00: ... was right, imagine the response of each particle to all possible spin measurements is encoded in each particle at the moment of their creation as hidden ...
  • 10:04: ... only possible to see the influence between the entangled partners after measurements have been made and those measurements are compared, just as we saw with ...

2016-08-10: How the Quantum Eraser Rewrites the Past

  • 03:26: It's impossible to make these measurements without messing up the wave.

2016-06-15: The Strange Universe of Gravitational Lensing

  • 05:57: ... distance measurements have allowed us to measure the Hubble Constant, which tells us the rate ...

2016-05-18: Anti-gravity and the True Nature of Dark Energy

  • 00:56: Paradoxically, our measurements points a near-perfect flatness.

2016-05-04: Will Starshot's Insterstellar Journey Succeed?

  • 11:49: There's a whole sequence of steps we use to calibrate astronomical distance measurements.

2016-04-27: What Does Dark Energy Really Do?

  • 09:19: That's what we see in our white dwarf supernova measurements.

2016-04-20: Why the Universe Needs Dark Energy

  • 01:41: There are two powerful and completely independent measurements that can test this prediction of the fate of the universe.
  • 01:48: Today, let's look at one of these measurements-- the geometry of the universe, which points to a discrepancy in the first Friedmann equation.
  • 06:21: So, did we miss up our measurements?

2016-03-23: How Cosmic Inflation Flattened the Universe

  • 02:57: Based on the precision of our measurements so far, we know that the curvature is within 0.4 of 1% of perfect flatness.

2015-10-07: The Speed of Light is NOT About Light

  • 11:26: ... curvature is the maximum that it could be, given the current flatness measurements. ...

2015-09-30: What Happens At The Edge Of The Universe?

  • 03:37: Given our best measurements of cosmological parameters, we think that the cosmic event horizon is around 16 billion light years away.
  • 05:18: Measurements of the distribution of galaxies and the CMB confirm this flatness with very high, but not infinite, precision.
  • 06:21: It's very possible that the universe has curvature just inside the uncertainty range of the best measurements to date.

2015-04-22: Are Space and Time An Illusion?

  • 05:08: In contrast, our experiences and measurements of time and space don't correspond to anything, per se.

2015-04-08: Could You Fart Your Way to the Moon?

  • 05:50: And if anyone is aware of documentable measurements of flatological exhaust speeds, include those too.

2015-04-01: Is the Moon in Majora’s Mask a Black Hole?

  • 01:19: Both analyses are extremely well done, and I'm actually going to rely on MatPat's measurements in this episode.

2015-03-11: What Will Destroy Planet Earth?

  • 05:37: And those measurements, while not conclusive, do allow for a scenario that physicists call The Big Rip.

2015-02-11: What Planet Is Super Mario World?

  • 02:55: ... turns out, other people have done more sophisticated versions of these measurements using Nintendo emulators, screen capture programs, and actual ...
  • 05:38: Remember, you could try this experiment yourself, even with rough measurements like mine.
  • 05:47: ... any actual planet, please let me know in the comments, along with your measurements. ...
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