1. Quantum teleportation: from Chinese legends to Quantum Communication
Zengle Huang

2. A Chinese Legend Monkey King’s body split (分身术)
Wu Cheng-En ( ) and “Journey to the west”
Many interesting imagination related to modern physics:
天上一日，地上一年
(One day in heaven, one year on earth)
Goku’s teleportation

3. Another Chinese Legend
Selected as Nature’s 10 in 2017
Raise the record of quantum teleportation distance from ~100km to 1400km
The aim of my presentation is to introduce his team’s experiment of transmitting the quantum state of a photon on Earth to a satellite in 2017.
Jianwei Pan,
Father of Quantum,
Professor, University of Sci&Tech in China

4. Quantum teleportation
The quantum state to be teleported is the polarization of the photon. e.g. |H>, |V>
The state to be teleported: |Φ >1 = α|H>1 + β|V>1
Choose the entangled state: |Φ+ >23 = (|H>2|H>3+|V>2|V>3)/ 2
|Ψ>123 = |Φ >1 ⨂ |Φ+ >23
=|Φ+ >12 ⨂ (α|H>3 + β|V>3)
=|Φ- >12 ⨂ (α|H>3 - β|V>3)
=|ψ+ >12 ⨂ (β|H>3 + α|V>3)
= |ψ- >12 ⨂ (β|H>3 - α|V>3)
Alice can always select the results to be the entangled photons having the same polarization.

5. Single photon production:
Ultraviolet 160fs laser pulses with repetition rate 80MHz
Pulses pass through two BiBO crystals to produce photon1 and an entangled photon pair (parametric down conversion)
Photon 1 and 2 are combined to perform a joint measurement;
Photon 3 is sent to the satellite
The photon 3 is measured by a polarization analyser, followed by two single photon detector.
Fidelity: overlap between the correct teleported state |χ> and the measured density matrix ρ,
F ≡ Tr( ρ| χ > < χ |)

6. Significance
First experiment to teleport quantum states from ground to a satellite
Greatly enhanced teleportation distance from ~100km to 1400km
Long-distance teleportation between light and matter
Global quantum network
Can we teleport a photon from Beijing to NY via a satellite?
Outlook