Unified Cramer-Rao bound for quantum multi-parameter estimation: Invertible and non-invertible Fisher information matrix
Min Namkung, Changhyoup Lee, and Hyang-Tag Lim
(arXiv)

Persistent quantum advantage with definite photon-number states in lossy multiple-phase estimation
Min Namkung, Dong-Hyun Kim, Seongjin Hong, Changhyoup Lee, and Hyang-Tag Lim
(arXiv)

Enhancing Quantum State Discrimination with Indefinite Causal Order
Spiros Kechrimparis, James Moran, Athena Karsa, Changhyoup Lee, and Hyukjoon Kwon
(arXiv)

Quantum enhanced distributed phase sensing with a truncated SU (1, 1) interferometer
Seongjin Hong, Matthew A Feldman, Claire E Marvinney, Donghwa Lee, Changhyoup Lee, Michael T Febbraro, Alberto M Marino, and Raphael C Pooser
(arXiv)

Optimal multiple-phase estimation with multi-mode NOON states against photon loss
Min Namkung, Dong-Hyun Kim, Seongjin Hong, Yong-Su Kim, Changhyoup Lee, and Hyang-Tag Lim
(arXiv)

Quantum plasmonic sensors
Changhyoup Lee, Benjamin Lawrie, Raphael Pooser, Kwang-Geol Lee, Carsten Rockstuhl, and Mark Tame
Chem. Rev. 121, 4743 (2021), (arXiv)

Optimal quantum metrology of two-photon absorption
Athena Karsa, Ranjith Nair, Andy Chia, Kwang-Geol Lee, and Changhyoup Lee
Quantun Sci. Technol. 9, 035042 (2024), (arXiv)

Quantum plasmonic sensing by Hong-Ou-Mandel interferometry
Seungjin Yoon, Yu Sung Choi, Mark Simon Tame, Jae Woong Yoon, Sergey Polyakov, and Changhyoup Lee
Metrologia 61, 055001 (2024), (arXiv)

Distributed quantum sensing of multiple phases with fewer photons
Dong-Hyun Kim, Seongjin Hong, Yong-Su Kim, Yosep Kim, Seung-Woo Lee, Raphael C Pooser, Kyunghwan Oh, Su-Yong Lee, Changhyoup Lee, and Hyang-Tag Lim
Nat. Commun. 15, 266 (2024)

Quantum loss sensing with two-mode squeezed vacuum state under noisy and lossy environment
Sang-il Park, Changsuk Noh, and Changhyoup Lee
Sci. Rep. 13, 5936 (2024)

Distributed quantum phase sensing for arbitrary positive and negative weights
Changhun Oh, Liang Jiang, and Changhyoup Lee
Phys. Rev. Research 4, 023164 (2022), (arXiv)

Quantum illumination with non-Gaussian states: Bounds on the minimum error probability using quantum Fisher information
Changsuk Noh, Changhyoup Lee, and Su-Yong Lee
J. Opt. Soc. Am. B 39, 1316 (2022), (arXiv)

Measuring kinetic parameters using quantum plasmonic sensing
Kelvin T. Mpofu, Changhyoup Lee, Glenn E. M. Maguire, Hendrik Gerhardus Kruger, and Mark S. Tame
Phys. Rev. A 105, 032619 (2022), (arXiv)

Theoretical studies on quantum imaging with time-integrated single-photon detection under realistic experimental conditions
Byeong-Yoon Go, Changhyoup Lee, and Kwang-Geol Lee
Sci. Rep. 12, 5338 (2022), (arXiv)

Experimental measurement of kinetic parameters using quantum plasmonic sensing
Kelvin T. Mpofu, Changhyoup Lee, Glenn E. M. Maguire, Hendrik Gerhardus Kruger, and Mark S. Tame
J. Appl. Phys. 131, 084402 (2022), (arXiv)

Optimal circular dichroism sensing with quantum light: Multi-parameter estimation approach
Christina Ioannou, Ranjith Nair, Ivan Fernandez-Corbaton, Mile Gu, Carsten Rockstuhl, and Changhyoup Lee
Phys. Rev. A 104, 052615 (2021), (arXiv)

Experimental quantum polarimetry using heralded single photons
Seung-Jin Yoon, Joong-Sung Lee, Carsten Rockstuhl, Changhyoup Lee, and Kwang-Geol lee
Metrologia 5, 045008 (2020), (arXiv)

Optimal distributed quantum sensing using Gaussian states
Changhun Oh, Changhyoup Lee, Seok Hyung Lie, and Hyunseok Jeong
Phys. Rev. Research 2, 023030 (2020), (arXiv)

Superconducting nanowire single-photon spectrometer exploiting cascaded photonic crystal cavities
Youngsun Yun, Andreas Vetter, Robin Stegmueller, Simone Ferrari, Wolfram H. P. Pernice, Carsten Rockstuhl, and Changhyoup Lee
Phys. Rev. Applied 13, 014061 (2020), (arXiv)

Using states with a large photon number variance to increase quantum Fisher information in single-mode phase estimation
Changhyoup Lee, Changhun Oh, Hyunseok Jeong, Carsten Rockstuhl, and Su-Yong Lee
J. Phys. Commun. 3 115008 (2019), (arXiv)

Analysis of the detection response of waveguide-integrated superconducting nanowire single-photon detectors at high count rate
Simone Ferrari, Vadim Kovalyuk, Andreas Vetter, Changhyoup Lee, Carsten Rockstuhl, Alexander Semenov, Gregory Gol'tsman, and Wolfram Pernice
Appl. Phys. Lett. 115, 101104 (2019)

Optimal measurements for quantum fidelity between Gaussian states and its relevance to quantum metrology
Changhun Oh, Changhyoup Lee, Leonardo Banchi, Su-Yong Lee, Carsten Rockstuhl, and Hyunseok Jeong
Phys. Rev. A 100, 012323 (2019), (arXiv)

Optimal Gaussian measurements for phase estimation in single-mode Gaussian metrology
Changhun Oh, Changhyoup Lee, Carsten Rockstuhl, Hyunseok Jeong, Jaewan Kim, Hyunchul Nha, and Su-Yong Lee
npj Quantum Inf. 5, 10 (2019), (arXiv)

Experimental demonstration of quantum learning speedup with classical input data
Joong-Sung Lee, Jeongho Bang, Sunghyuk Hong, Changhyoup Lee, Kang Hee Seol, Jinhyoung Lee, and Kwang-Geol Lee
Phys. Rev. A 99, 012313 (2019), (arXiv) 

Quantum plasmonic sensing using single photons
Joong-Sung Lee, Seung-Jin Yoon, Hyungju Rah, Mark Tame, Carsten Rockstuhl, Seok Ho Song, Changhyoup Lee, and Kwang-Geol Lee
Opt. Express 26, 29272 (2018), (arXiv)

Quantum plasmonic N00N state in a silver nanowire and its use for quantum sensing
Yang Chen, Changhyoup Lee, Liu Lu, Di Liu, Yunkun Wu, Lantian Feng, Ming Li, Carsten Rockstuhl, Guoping Guo, Guangcan Guo, Mark Tame, and Xifeng Ren
Optica 5, 1229 (2018), (arXiv)

Quantum noise reduction in intensity-sensitive surface plasmon resonance sensors
Joong-Sung Lee, Trung Huynh, Su-Yong Lee, Kwang-Geol Lee, Jinhyoung Lee, Mark Tame, Carsten Rockstuhl, and Changhyoup Lee
Phys. Rev. A 96, 033833 (2017), (arXiv)

Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors
Simone Ferrari, Vadim Kovalyuk, Wladislaw Hartmann, Andreas Vetter, Oliver Kahl, Changhyoup Lee, Alexander Korneev, Carsten Rockstuhl, Gregory Gol’tsman, and Wolfram Pernice
Opt. Express 25, 8739 (2017)

Sub-Poisson-Binomial Light
Changhyoup Lee, Simone Ferrari, Wolfram H. P. Pernice, and Carsten Rockstuhl
Phys. Rev. A 94, 053844 (2016), (arXiv)

Quantum plasmonic sensing: beyond the shot-noise and diffraction limit
Changhyoup lee, Frederik Dieleman, Jinhyoung Lee, Carsten Rockstuhl, Stefan A. Maier, and Mark Tame
ACS Photonics 3, 992 (2016), (arXiv)

Few-photon transport in many-body photonic systems: A scattering approach
Changhyoup Lee, Changsuk Noh, Nikolaos Schetakis, and Dimitris G. Angelakis
Phys. Rev. A 92, 063817 (2015), (arXiv)

Quantum plasmonic excitation in graphene and loss-insensitive propagation
George W. Hanson, Seyyed Ali Hassani Gangaraj, Changhyoup Lee, Dimitris G. Angelakis, and Mark Tame
Phys. Rev. A 92, 013828 (2015), (arXiv)

Photonic lattice simulation of dissipation-induced correlations in bosonic systems
Amit Rai, Changhyoup Lee, Changsuk Noh, and Dimitris G. Angelakis
Sci. Rep. 5, 8438 (2015), (arXiv)

A quantum speedup in machine learning: finding an N-bit Boolean function for a classification
Seokwon Yoo, Jeongho Bang, Changhyoup Lee, and Jinhyoung Lee
New J. Phys. 16, 103014 (2014), (arXiv)

Multi-setting Greenberger-Horne-Zeilinger theorem
Junghee Ryu, Changhyoup Lee, Yin Zhi, Ramij Rahaman, Dimitris G. Angelakis, Jinhyoung Lee, and Marek Zukowski
Phys. Rev. A 89, 024103 (2014), (arXiv)

Probing the effects of interaction in Anderson localization using linear photonic lattices
Changhyoup Lee, Amit Rai, Changsuk Noh, and Dimitris G. Angelakis
Phys. Rev. A 89, 023823 (2014), (arXiv)

Greenberger-Horne-Zeilinger theorem for N quDits
Junghee Ryu, Changhyoup Lee, Marek Zukowski, and Jinhyoung Lee
Phys. Rev. A 88, 042101 (2013), (arXiv) 

Robust-to-loss entanglement generation using a quantum plasmonic nanoparticle array
Changhyoup Lee, Mark Tame, Changsuk Noh, James Lim, Stefan A. Maier, Jinhyoung Lee, and Dimitris G. Angelakis
New J. Phys. 15, 083017 (2013), (arXiv) 

A quantum heuristic algorithm for the traveling salesman problem
Jeongho Bang, Junghee Ryu, Changhyoup Lee, Seokwon Yoo, James Lim, and Jinhyoung Lee
J. Korean Phys. Soc. 61, 1944 (2012), (arXiv)

Quantum plasmonics with a metal nanoparticle array
Changhyoup Lee, Mark Tame, James Lim, and Jinhyoung Lee
Phys. Rev. A 85, 063823 (2012), (arXiv) 

Role of energy-level mismatches in a multi-pathway complex of photosynthesis
James Lim, Junghee Ryu, Changhyoup Lee, Seokwon Yoo, Hyunseok Jeong, and Jinhyoung Lee
New J. Phys. 13, 103002 (2011), (arXiv) 

Nonlocality for continuous variable system with local symplectic operation
Junghee Ryu, James Lim, Changhyoup Lee, and Jinhyoung Lee
J. Mod. Opt. 57, 1550 (2010)

Genuinely high-dimensional nonlocality optimised by complementary measurements
James Lim, Junghee Ryu, Seokwon Yoo, Changhyoup Lee, Jeongho Bang, and Jinhyoung Lee
New J. Phys. 12, 103012 (2010)

Long-range surface plasmon polariton excitation at the quantum level
Daniel Ballester, Mark S. Tame, Changhyoup Lee, Jinhyoung Lee, and Myungshik Kim
Phys. Rev. A 79, 053845 (2009), (arXiv)

Single-photon excitation of surface plasmon polaritons
Mark S. Tame, Changhyoup Lee, Jinhyoung Lee, Daniel Ballester, Mauro Paternostro, Anatoly V. Zayats, and Myungshik Kim
Phys. Rev. Lett. 101, 190504 (2008), (arXiv)

Introduction to quantum plasmonic sensing
Changhyoup Lee, Mark Tame, Carsten Rockstuhl, and Kwang-Geol Lee
Nano-Optics: Fundamentals, Experimental Methods, and Applications Micro and Nano Technologies, Elsevier (2020)

Quantum properties of gold nanoparticles
Changhyoup Lee and Mark Tame
Gold Nanoparticles for Physics, Chemistry and Biology (2nd Edition), World Scientific (2017)

Plasmonics and sensing beyond classical limits
Mark Tame and Changhyoup Lee
Proc. SPIE 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019, 110910J (3 September 2019)

Quantum metrology
Changhyoup Lee and Young-Sik Ra
K-Light (2019)

Quantization of surface plasmon and its applications
Jinhyoung Lee and Changhyoup Lee
Optical Science and Technology, 15, 9 (2011)