Lecture on Quantum Teleportation

Introduction

Speaker: Janna Levin

• Teleportation in Science Fiction:
  • Star Trek transporter, Doctor Who's Tardis.
  • Used for instant travel without time delay.
• Quantum Teleportation:
  • Dramatically different and real.
  • Disappearing from one location, appearing at another without traveling in between.
  • Potential to revolutionize communications, computing, and our understanding of the world.

Guest Introduction

Guest: John Preskill

• Professor of Theoretical Physics at Caltech.
• Founder of the Institute for Quantum Information and Matter.
• Research fields include:
  • Particle Physics
  • Quantum Field Theory
  • Quantum aspects of the early universe and black holes.
  • Current work on quantum computing and information.

Key Concepts: Quantum Entanglement

• Entanglement: Correlated states between parts of a quantum system.
  • Different from ordinary bits.
  • Qubits can be correlated in two complementary ways (two doors analogy).
• Disturbing Qubits: Observing a qubit disturbs it, leading to randomness.

Measurement and Correlation

• Measuring one qubit does not instantly determine the state of the other qubit faster than light.
• Correlations observed only when both parties communicate (i.e., discuss).
• Einstein referred to entanglement as