# Lab News

From Sogang QOQI Wiki

### Lab meeting and seminar

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## 2017

#### April

- 2017/04/19-21 There was 2017 KPS spring conference in Daejeon, Republic of Korea.
- Poster : Towards the tightness condition of Bell's inequalities for bi-partite high-dimensional system / Kwang-il Bae and Wonmin Son
- Poster : Entropy and non-Gaussianity bounded uncertainty relations / Kyunghyun Baek and Wonmin Son

#### Feb.

- 2017/02/16 There was Quantum ICT Tech Symposium 2017 hosted by Quantum Union of Korea.
- Student presentation
- Towards the tightness condition of Bell's inequalities for bipartite high dimensional system / Kwangil Bae, Wonmin Son
- Non-Gaussianity and entropy-bounded uncertainty relations / Kyunghyun Baek, Wonmin Son

- K. Bae was received the exellence award for student presentation.

- Student presentation

## 2016

#### December

- 2016/12/06 Kyunghyun Baek received "The Dow Chemical-Sogang award for Outstanding Graduate Student 2016."

#### November

- 2016/11/21-24 There was Workshop on Quantum Information Science in Busan.

#### October

- 2016/10/19-21 There was 2016 KPS fall conference in Gwangju, Republic of Korea.
- Poster : Key rate enhancement using qutrit states for quantum key distribution with askew aligned sources / Yonggi Jo and Wonmin Son
- Undergraduate student poster presentations
- Simulation of 1D Ising model using MPS method / Eunhye Kang, Donggeun Lee and Wonmin Son
- Analytic approach for the functional bound of generalized Bell correlation / Seoyoung Lee, Kwangil Bae and Wonmin Son
- Unsharpness of generalized measurement and its effect in entropic uncertatinty relations under white noise / Jeongwon Lee, Kyunghyun Baek and Wonmin Son
- Quantum key distribution post-process program / Youngmin Jo, Yonggi Jo, Gunwoo Kim and Wonmin Son

- Jeongwon Lee received the excellence award for the undergradutate student presentation (Congratulation!).

#### September

- 2016/09/12-16 There was QCrypt 2016 in Washington DC, USA.
- Poster : Key rate enhancement using qutrit states for quantum key distribution with askew aligned sources / Yonggi Jo and Wonmin Son

- 2016/08/28-09/02 There was AQIS 2016 in Taipei, Taiwan.
- Poster : Entropic uncertainty relations for successive generalized measurements / Kyunghyun Baek, Kwangil Bae and Wonmin Son

#### August

- There was Summer School "Nonclassicalities in Macroscoic Systems" Link at KIAS.

#### July

- 2016/07/24-29 There was ICAP 2016 in Seoul, Republic of Korea.
- Prof. W. Son (Local organizing committee)
- K. Baek, K. Bae, D. Lee, Y. Jo, G. Kim (Volunteer staff)
- Poster : Simulation of the small number of qubits in 1D array using MPS method / Donggeun Lee, Kyunghyun Baek, Wonmin Son

#### May

- 2016/05/23-24 There was Quantum ICT Tech Symposium 2016 hosted by Quantum Union of Korea.
- Student presentation : Quantum Key Distribution Post-processing Program / Gunwoo Kim, Yonggi Jo, Wonmin Son
- G. Kim was received the grand prize for student presentation award.

#### April

- 2016/04/20-22 There was 2016 spring KPS conference in Daejeon.

## 2015

#### December

- 2015/12/16 Master thesis exam, S. Seng. (Congratulation!)

- 2015/12/10-14 There wes Workshop on Quantum Nonlocality, Causal Structures and Device-independent Quantum Information in Taiwan.
- Invited talk : Measurable criteria of generalized non-locality / Wonmin Son
- Poster : Entanglement witness with generalized Bell correlation / Kwangil Bae and Wonmin Son

#### November

- 2015/11/25-28 There was KIAS Workshop on Quantum Information and Thermodynamics in Busan.
- Talk : Consistent theory for generalized causal non-locality / Wonmin Son

#### October

- 2015/10/21-23 There was 2015 fall KPS conference in Gyeongju.
- Poster : Toeplitz matrix for generalized entanglement witness / Kwangil Bae and Wonmin Son
- Poster : Simulation of the small number of qubits in 1D array using MPS method / Donggeun Lee and Wonmin Son
- Poster : Measurement-device-independent Quantum Key Distribution using 3-dimensional quantum states / Yonggi Jo and Wonmin Son

#### September

- 2015/09/28-10/02 K.I. Bae and Y.G. Jo parcitipated in QCrypt 2015 in Tokyo, Japan.

#### August

- 2015/08/24-28 D.G. Lee parcitipated in the 4th School of Mesoscopic Physics & The 28th Workshop on Mesoscopic and Nanoscale Systems.
- Poster : Simulation of the small number of quits in 1D array using MPS method / Donggeun Lee and Wonmin Son

- 2015/08/24-28 There was AQIS 2015 in Seoul.
- Poster : Effects of generalized measurement on entropic uncertainty / Kyunghyun Baek and Wonmin Son
- Poster : Generalized Bell correlation and its algebric analysis / Gwangil Bae and Wonmin Son
- Poster : Simulation of the small number of qubits in 1D array using MPS method / Donggeun Lee and Wonmin Son
- Kyunghyun Baek was received bronze prize for the best poster award.

- 2015/08/21 Dr. Teiko Heinossari gave a talk on incompatibile measurements.

- 2015/08/17-21 K.H. Baek and Y.G. Jo parcitipated in 2015 QKD Summer School hosted by IQC.

#### July

- 2015/07/4-5 D.G. Lee participated in International Workshop on Ray & Wave Mechanics in 2D Microcavity and Related Systems.
- Poster : Simulation of small qubits (20-25) in 1D array using MPS method and its error analysis / Donggeun Lee and Wonmin Son

#### June

- 2015/06/28-7/1 D.G. Lee participated in 2015 Condensed Matter Physics Summer School.

#### May

- 2015/5/4-/2015/5/8 K. Bae participated in workshop Randomness in Quantum Physics and Beyond in Barcelona.

#### April

- 2015/04/22-24 There was 2015 Spring KPS Spring conference in Daejeon.
- Poster : Effects of generalized measurement on the entropic uncertainty / Kyunghyun Baek and Wonmin Son

- 2015/04/16 There was Graduate Open Houses and lab introduction session. (Department of physics, Sogang University)

#### March

- 2015/03/10 There was the colloquium "Quantum revolution in information technologies: fundamentals and applications" by Prof. Seung-Woo Lee(SNU).

#### January

- 2015/01/28-30 Lab members had been to Daejeon to participate in 2015 winter OSK conference.

- 2015/01/05-09 KIAS - Mathematics of Quantum Optics

## 2014

#### December

- 2014/12/17 Master thesis exam, G. Bae (Congratulation!)

- 2014/12/1-5 Dong-guen Lee has been to Beijing, China to participate in Tensor Network States: Algorithms and Applications

#### October

- 2014/10/22-24 Lab members have been to Gwangju to participate in 2014 autumn KPS conference.

- 2014/10/13 Jinhyeong Lee (Hanyang Univ.) visited.

- 2014/10/10 Jinhyeong Lee (Hanyang Univ.) visited.

#### September

- 2014/9/18 Won-Young Hwang (Chonnam Nat. Univ.) visited.
- 2014/9/15 Jinhyoung Lee (Hanyang Univ.) visited.

#### August

- 2014/08/20-24 K.H. Baek, K.I. Bae and Prof Son participated in AQIS 2014 in Kyoto, Japan.
- Poster : Effects of generalized measurement in uncertainty principles / Kyunghyun Baek, Wonmin Son
- Poster : Axiomatic approach for generic Bell function / Gwangil Bae, Wonmin Son

- 2014/08/18-22 Y.G. Jo had ".NET C# Objective Oriented Programming" class in Samsung SDS multicampus.

#### July

- 2014/07/07-11 There was 2014 Open KIAS School & Workshop on QUANTUM INFORMATION Science.

#### June

- 2014/06/19-22 Monumental conference celebrating 50 years of Bell's inequality [1].

- 2014/06/19-21 Students participated in 2014 AMP Workshop in Muju, Korea.
- Poster : Sub-shot noise frequency measurement without a priori knowledge / Changhun Oh, Sopheak Seng, Wonmin Son
- Poster : Entropic uncertainty for successive generalized measurements / Kyunghyun Baek, Wonmin Son

- 2014/06/10 There was the colloquium "Generation of multiphoton quantum states and applications" by Dr. Hee Su Park (KRISS).

#### May

- 2014/05/29-31 D.G. Lee and Y.G. Jo participated in The 3rd School of Mesoscopic Physics "Circuit Quantum Electrodynamics in Solid State : Exploring the entanglement of single electrons and microwave photons" in Buyeo, Korea.

- 2014/05/17 There was the bike trip to Ara water way.

- 2014/05/10 There was the bike trip to Paldang-dam (Picture).

- 2014/05/09 Regular lab meeting. (Presentation by Y.G. Jo about "Quantum Cryptography and its post process")

#### April

- 2014/04/23-25 Lab members had been to Daejeon to participate in 2014 spring KPS conference.
- Talk : Theory for Generalized Causal Nonlocality with Non-linear Schrodinger Equation / Prof. Wonmin Son
- Poster : Optimized Entropic Uncertainty for Successive Generalized Measurements (Abstract) / Kyunghyun Baek (the doctor's course)
- Kyunghyun Baek received excellence award in poster section (우수 포스터 발표상). (Link : KPS page, Sogang page )

- 2014/04/18 Regular lab meeting. (Watching the lecture "The physics of cryptography" by Dr. Renato Renner)

- 2014/04/15 There was the colloquium "극저온 양자기체를 이용한 초유체실험 연구" by Prof. Yong-il Shin (Seoul Nat. Univ.).

- 2014/04/10 There was talk by Dr. Joseph Paul Cotter (Vienna Center for Quantum Science and Technology).

- 2014/04/04 There was regular lab meeting. (Watching the video "Topological Quantum Computing" by Steve Simon.)

#### March

- 2014/03/28 There was regular lab meeting. (Presentation by Kyunghyun Baek, and watching the video "Quantum Computing & the Entanglement" by John Preskill)

- 2014/03/21 There was regular lab meeting. (Presentation by Changhun Oh)

- 2014/03/01 There was the new member, Sopheak Seng.

## 2013

#### December

- 2013/12/21 There was the CMQC workshop 2013 with CMQC
^{[1]}(Seoul Nat'l Univ.) and QIG^{[2]}(Hanyang Univ.) at Seoul Nat'l Univ..

- 2013/12/16-18 Lab members participated in AQCWQIS 2013
^{[3]}.

- 2013/12/03 There was the colloquium "Combining High-Resolution and Ultrafast Measurements" by Prof. Thomas Schultz (UNIST).

#### November

- 2013/11/26 There was the colloquium "Personalized diagnosis of cancers with real-time single-molecule co-IP analysis" by Prof. Taeyoung Yoon (KAIST).

- 2013/11/16 Lab members participated in 서울한양도성걷기.

- 2013/11/07 Dr. Jingak Jang visited.

#### October

- 2013/10/30-11/1 Prof. W.M. Son had been Changwon to attend 2013 fall academic conference of The Korean Physical Society.

- 2013/10/10 Prof. W.M. Son had been colloquium in Inha University "우리는 과연 불확정성의 원리를 잘 알고 있을까?"

#### September

- 2013/09/25 Prof. W.M. Son had been colloquium in POSTECH "Quantum entanglement in many-body systems."

- 2013/09/24 Mr. Jungjun Park (CQT PhD Student)visited our lab.

- 2013/09/24 There was open lab and lab introduction session. (Department of physics, Sogang University)

- 2013/09/12 Prof. W.M. Son had been Cheonan to participate WISC 2013.

- 2013/09/06 Lab members had dinner.

#### August

- 2013/08/29 Y.G. Jo had been Daejeon to have meeting with Dr. Jang.

- 2013/08/25-30 K.H. Baek had been Chennai, India to participate AQIS 2103.

- 2013/08/12 Lab members participated KIAS seminar.

- 2013/08/06 Lab meeting. (Presentation on how to calculate many body system by D.G. Lee.)

#### July

- 2013/07/30 Lab meeting. (Presentation on CASCADE Method on reconciliation by Y.G. Jo.)

- 2013/07/16 Lab meeting. (Presentation on original Bell's theorem by K.I. Bae.)

- 2013/07/09 Lab meeting. (Presentation on multi-entanglement by K.H. Baek.)

- 2013/07/04 We had seminar about Maxwell's demon and Szilard engine in quantum mechanics with Prof. Sangwook Kim (Pusan National Univ.).

- 2013/07/02 Lab meeting. (Presentations on basic quantum cryptography by Y.G. Jo and postulate of quantum mechanics by D.G. Lee)

#### June

- 2013/06/12 Dr. Jingak Jang (ETRI) visited qoqi lab.

- 2013/06/07 Dr. Jeongho Bang (Seoul National Univ.) visited QOQI lab.

- 2013/06/04 Colloquium "Thinking star dust: Experimental Nuclear Astrophysics" by Prof. Kyung-Yuk Chae (Sungkyunkwan Univ.).

- 2013/06/04 Lab meeting. (Presentation on how to distinguish separable state and entangled state, by K.H. Baek)

#### May

- 2013/05/28 Lab meeting with Dr. James Lim (Hanyang Univ.). (Presentation on photosynthesis and quantum coherence.)

- 2013/05/27 Dr. James Lim (Hanyang Univ.) visited QOQI lab.

- 2013/05/24 Prof. Hyunseok Jeong(Seoul National Univ.) did lecture about quantum computation by using Google Hangout.

- 2013/05/21 Lab meeting (Watching the lecture about ion trapping by Christopher Monroe)

- 2013/05/17-18 Lab members have been to Heyri village to hold seminar.

- 2013/05/15 Teacher's Day event.

- 2013/05/14 Lab meeting (Discussing the plan of seminar on 5/17-18.)

- 2013/05/07 Colloquium "Quantum coherence in photosynthetic excitation energy transfer processes: a case study with the Fenna-Matthews-Olson complex" by Prof.Young-Min Rhee (POSTECH).

- 2013/05/07 Lab meeting (
**1.**Watching Documentary "BBC Horizon Order And Disorder With Jim Al.Khalili EP02"**&****2.**Presentation 2 about APCTP seminar(2013/04/17-18) by D.G. Lee)

#### April

- 2013/04/30 Lab meeting (Presentation on APCTP seminar(2013/04/17-18) by D.G. Lee)

- 2013/04/22 Lab members dined at Ashley.

- 2013/04/19 Prof. Son and D.G. Lee had been KIAS to participate seminar.

- 2013/04/17-18 D.G. Lee had been POSTECH to participate APCTP
^{[4]}seminar "Matrix product states for computation of the ground states and the time evolution".

- 2013/04/16 Lab meeting (Watching the lecture about quantum entanglement by Leonard Susskind)

- 2013/04/09 Lab meeting (Watching the lecture about quantum information)

- 2013/04/04 Lab meeting with Prof. Jinhyung Lee (Lecture about quantum interference)

- 2013/04/01 The homepage of Sogang QOQI
^{[5]}laboratory is opened.