37 citations · 240 across the 19 of their papers we have counts for
19 papers
Aluminum nitride waveguide beam splitters for integrated quantum photonic circuits
Hyeong-Soon Jang, Donghwa Lee, Hyungjun Heo +7
We demonstrate integrated photonic circuits for quantum devices using sputtered polycrystalline aluminum nitride (AlN) on insulator. The on-chip AlN waveguide directional couplers,…
Sub-10 nm precision engineering of solid-state defects via nanoscale aperture array mask
Tae-yeon Hwang, Junghyun Lee, Seong-Woo Jeon +7
Engineering a strongly interacting uniform qubit cluster would be a major step towards realizing a scalable quantum system for quantum sensing, and a node-based qubit register. For…
Error-mitigated photonic variational quantum eigensolver using a single-photon ququart
Donghwa Lee, Jinil Lee, Seongjin Hong +6
We report the experimental resource-efficient implementation of the variational quantum eigensolver (VQE) using four-dimensional photonic quantum states of single-photons. The four…
High resolution, High contrast optical interface for defect qubits
Jong Sung Moon, Haneul Lee, Jin Hee Lee +10
Point defects in crystals provide important building blocks for quantum applications. To initialize, control, and read-out their quantum states, an efficient optical interface for…
Characterizing Bell state analyzer using weak coherent pulses
Donghwa Lee, Young-Wook Cho, Hyang-Tag Lim Sang-Wook Han +3
Bell state analyzer (BSA) is one of the most crucial apparatus in photonic quantum information processing. While linear optics provide a practical way to implement BSA, it provides…
Equitable multiparty quantum communication without a trusted third party
Tanumoy Pramanik, Dong-Hwa Lee, Young-Wook Cho +6
Multiparty quantum communication provides delightful applications including quantum cryptographic communication and quantum secret sharing. Measurement-Device-Independent (MDI) qua…
Single-Copy Certification of Two-Qubit Gates without Entanglement
Yujun Choi, Tanmay Singal, Young-Wook Cho +5
A quantum state transformation can be generally approximated by single- and two-qubit gates. This, however, does not hold with noisy intermediate-scale quantum technologies due to…
Observing the "quantum Cheshire cat" effect with noninvasive weak measurement
Yosep Kim, Dong-Gil Im, Yong-Su Kim +4
One of the common conceptions of nature, typically derived from the experiences with classical systems, is that attributes of the matter coexist with the substance. In the quantum…
Reference-Frame-Independent, Measurement-Device-Independent quantum key distribution using fewer quantum states
Donghwa Lee, Seong-Jin Hong, Young-Wook Cho +6
Reference-Frame-Independent Quantum Key Distribution (RFI-QKD) provides a practical way to generate secret keys between two remote parties without sharing common reference frames.…
User-independent optical path length compensation scheme with sub-ns timing resolution for 1xN quantum key distribution network system
Byung Kwon Park, Min Ki Woo, Yong-Su Kim +3
Quantum key distribution (QKD) networks constitute promising solutions for secure communication. Beyond conventional point-to-point QKD, we developed 1xN QKD network systems with a…
Efficient generation of multipartite W state via quantum eraser
Yong-Su Kim, Young-Wook Cho, Hyang-Tag Lim +1
Entanglement among multiple particles is a keystone for not only fundamental research on quantum information but also various practical quantum information applications. In particu…
Experimental comparison of various quantum key distribution protocols under reference frame rotation and fuctuation
Juhwan Yoon, Tanumoy Pramanik, Byung Kwon Park +4
In free-space quantum key distribution (QKD) between moving parties, e.g., free-space QKD via satellite, the reference frame rotation and fluctuation degrades the performance of QK…
Informationally symmetrical Bell state preparation and measurement
Yong-Su Kim, Tanumoy Pramanik, Young-Wook Cho +4
Bell state measurement (BSM) plays crucial roles in photonic quantum information processing. The standard linear optical BSM is based on Hong-Ou-Mandel interference where two photo…
Revealing of hidden quantum steerability using local filtering operations
Tanumoy Pramanik, Young-Wook Cho, Sang-Wook Han +3
Nonlocal quantum correlation is at the heart of bizarre nature of quantum physics. While there are various classes of nonlocal quantum correlation, steerability of a quantum state…
Limits on manipulating conditional photon statistics via interference of weak lasers
Kang-Hee Hong, Ji-Sung Jung, Yong-Wook Cho +5
Photon anti-bunching, measured via the Hanbury-Brown-Twiss experiment, is one of the key signatures of quantum light and is tied to sub-Poissonian photon number statistics. Recentl…
Robustness of reference-frame-independent quantum key distribution against the relative motion of the reference frames
Tanumoy Pramanik, Byung Kwon Park, Young-Wook Cho +4
Reference-Frame-Independent quantum key distribution (RFI-QKD) is known to be robust against slowly varying reference frames. However, other QKD protocols such as BB84 can also pro…
Generation of a non-zero discord bipartite state with classical second-order interference
Yujun Choi, Kang-Hee Hong, Hyang-Tag Lim +7
We report investigation on quantum discord in classical second-order interference. In particular, we theoretically show that a bipartite state with D = 0.311 of discord can be gene…
Quantum discord protection from amplitude damping decoherence
Jiwon Yune, Kang-Hee Hong, Hyang-Tag Lim +6
Entanglement is known to be an essential resource for many quantum information processes. However, it is now known that some quantum features may be acheived with quantum discord,…
Plug-and-Play Measurement-Device-Independent Quantum Key Distribution
Yong-Su Kim, Yujun Choi, Osung Kwon +2
Quantum key distribution (QKD) gaurantees unconditional communication security based on the laws of quantum physics. However, practical QKD suffers from a number of quantum hacking…