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1. Quantum Coherence Control
    (Light-matter interactions)
- Raman optical memory (1997/1998)
- Quantum switch (2000)
- Ultraslow/stop light (2002)
- Entangled photon pairs (2003)
- Schrodinger's Cat (2004)
- Stationary light (2005)
- All-optical logic gates (2009) 
- Quantum memories (2009~2020)

2. Quantum Memory

    (Fundamental physics)

- Raman echo (2009)

  • Nature Photon. 3, 518 (2009)

- Double rephasing echo ('11~'20)

  • arXiv:1101.5480 (2011)

  • Phys. Rev. A 85, 031402(R) (2012);  ibid 94, 049905(E) (2016);

  • Adv. Appl. Sci. Res. 9, 32  (2018)

  • Entropy 22, 900 (2020)

  • Entropy 22, 1007 (2020)

- ac Stark echo (2017)

- Controlled echo (2018)

 

3. Secured key distribution
    (Protocols)
- USCKD (2020)
  (Sci. Rep. 10, 11687 ​)
- USCKD exp.(2021)
  (Sci. Rep. 11, 4149)
- Free space USCKD exp.
   (Sci, Rep. 11, 1900)
- Network compatible   USCKD (2021)
  (Cryptography 6, 4 (2021))​
 

4. Quantum Information
    (fundamental physics) 
- Hong-Ou-Mandel effects)
  (Sci. Rep. 10, 7309 (2020);
  arXiv:2203.13983v2 (2022))
- Franson nonlocal correlation
  (arXiv:2112.10148v2 (2022))
- Delayed choice quantum eraser
  (​Sci. Rep. 13, 9758 (2023))

5. Quantum Sensing 
- Superresolution
  (Sci. Rep.  14, 1752 (2024))
- Quantum Sagnac Gyro (active RLG)
  (Sensors 22, 8687 (2022)​

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