# Quantum Mechanics in the Labs Lee InGoo Sopheak

- Slides: 12

Quantum Mechanics in the Labs Lee In-Goo Sopheak Seng

0. Contents (1) Introduction (2) What we study (3) Q. M in my lab (4) Finish

1. Introduction • • Quantum Chaos Applications Lab Supervisor : Prof. Kim Chill Min Office : K 503 Members : 3 members in master’s course 2 members in doctor’s course

2. What we study • Designing a micro cavity laser • Optical power is very low… but • High Q-factor • Low threshold • High density optoelectronic integration

3. Q. M in my lab Classical Ray Optics Wave equation solution : Reflection rule Snell’s law Fresnel’s eq. : Helmholtz equation → similar to Schrodinger eq. The Resonance states are eigen-states for the micro cavity (potential well)

3. Q. M in my lab Example. Limacon shape Because of the deformation, the motions get non-linearity → Resonance have a difference, according to the initial point States are perturbed → Deformation makes a perturbation!!

4. Finish • We can see the LINK of the Classical Mechanics and Quantum Mechanics through the micro cavities • And we improve the micro cavity laser (Q-factor, lasing direction, light power, etc. . )

Introduction to QOQI Quantum Optics & Quantum Information Lab • Supervised by: Prof. Son Wonmin • Students: • 4 Integrated Master & Doctoral Course • 2 Master • Office: K 318 B • http: //qoqi. sogang. ac. kr/index. php/Main_Page

QOQI • What is Quantum Information? – Study about physical information in quantum states – Recent subject (1990 s) • Why use Quantum Mechanics?

QM in QOQI • “Quantum Cryptography” Post-process in Quantum Key Distribution – QM: Q. Superposition + Q. Entanglement + Information in Q. state = secure communication • “Precision Measurement” – QM: Study application of Entanglement

Conclusion • QOQI Lab: QM is one the most important tool for better understanding of Quantum Information.

Thank you! Q&A