In this episode, Seeker tackles the question that’s on everyone’s minds: what will it take to have quantum internet in our home?

Yes, Virginia, a quantum internet is in the works.

The U.S. Department of Energy recently rolled out a blueprint describing research goals and engineering barriers on the way to quantum internet.

The DOE’s latest blueprint for a quantum internet in the U.S. has four key milestones. The first is to make sure quantum information sent over current fiber optic cables is secure. Then to establish entangled networks across colleges or cities, then throughout states, and finally for the whole country.

In this video, Sabine Hossenfelder explains how public key cryptography works on the internet today, using RSA as example, what the risk is that quantum computers pose for internet security, what post-quantum cryptography is, how quantum key distribution works, and what quantum cryptography is.

Video contents:

  • 0:00 Intro
  • 0:31 Public Key Cryptography
  • 2:43 Risk posed by Quantum Computers
  • 4:03 Post Quantum Cryptography
  • 5:31 Quantum Key Distribution
  • 10:25 Quantum Cryptography and Summary
  • 11:16 NordVPN Sponsor Message
  • 12:28 Thanks

Geek’s Lesson provides this full nine hour source on quantum mechanics.

Quantum mechanics (QM; also known as #quantum #physics, quantum theory, the wave mechanical model, or #matrixmechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles. 

Table of Contents

  • (0:00) Lesson 1: Fundamentals
  • (10:03) Lesson 2: Complex Numbers in Quantum Mechanics
  • (27:20) Lesson 3: Representing Complex Things
  • (43:03) Lesson4: Superposition and Stationary States
  • (1:0:00) Lesson5: Infinite Square Well
  • (1:19:48) Lesson 6: More ISW + Dirac Notation
  • (1:39:07) Lesson 9: QSHO, Operator Method, part 1
  • (1:55:37) Lesson 10: QSHO Part 2
  • (2:18:42) Lesson11 SHO Analytical
  • (2:32:56) Lesson13 Free Particle (redo)
  • (3:00:28) Lesson14 More Fourier Transforms, inner products
  • (3:22:10) Lesson15 Delta Bound States
  • (3:32:50) Lesson16: Scattering States of the Dirac Delta Potential + More DFT concepts
  • (4:06:17) Finite Square Well (updated)
  • (4:32:43) Tunneling and Bonding
  • (5:08:05) Review (or intro) to Linear Algebra + Notation
  • (6:03:52) Formalism I
  • (6:14:20) Formalism II More Quantum Formalism
  • (6:43:49) Formalism III: Time Evolution + More Change of Basis
  • (7:39:45) Exam 3 Prep, More time evolution of Ammonia molecule
  • (7:55:25) SWE in 3D
  • (8:25:07) Hydrogen Solutions + Angular Momentum
  • (8:31:14) Angular Momentum-II
  • (8:57:34) Spin 1/2

Sabine Hossenfelder explains one of the most common misunderstandings about quantum mechanics — that quantum mechanics is about making things discrete or quantifiable.

This must be one of the most common misunderstandings about quantum mechanics, But is an understandable misunderstanding because the word “quantum” suggests that quantum mechanics is about small amounts of something. Indeed, if you ask Google for the meaning of quantum, it offers the definition “a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.” Problem is that just because energy is proportional to frequency does not mean it is discrete. In fact, in general it is not.