41 citations · 637 across the 38 of their papers we have counts for
38 papers
Surpassing the repeaterless bound with a photon-number encoded measurement-device-independent quantum key distribution protocol
Ozlem Erkilic, Lorcan Conlon, Biveen Shajilal +5
Decoherence is detrimental to quantum key distribution (QKD) over large distances. One of the proposed solutions is to use quantum repeaters, which divide the total distance betwee…
Shortcut to Multipartite Entanglement Generation: A Graph Approach to Boson Subtractions
Seungbeom Chin, Yong-Su Kim, Marcin Karczewski
We propose a graph method for systematically searching for schemes that can generate multipartite entanglement in linear bosonic systems with heralding. While heralded entanglement…
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…
Implementation of a 3 x 3 directionally-unbiased linear optical multiport
Ilhwan Kim, Donghwa Lee, Seongjin Hong +4
Linear optical multiports are widely used in photonic quantum information processing. Naturally, these devices are directionally-biased since photons always propagate from the inpu…
Global triplewise information trade-off in quantum measurement
Seongjin Hong, Yong-Su Kim, Young-Wook Cho +3
State disturbance by a quantum measurement is at the core of foundational quantum physics and constitutes a fundamental basis of secure quantum information processing. While quanti…
Entangling three identical particles via spatial overlap
Donghwa Lee, Tanumoy Pramanik, Young-Wook Cho +3
Quantum correlations between identical particles are at the heart of quantum technologies. Several studies with two identical particles have shown that the spatial overlap and indi…
Efficient linear optical generation of a multipartite W state
Pawel Blasiak, Ewa Borsuk, Marcin Markiewicz +1
A novel scheme is presented for generation of a multipartite W state for arbitrary number of qubits. Based on a recent proposal of entanglement without touching, it serves to demon…
Graph Picture of Linear Quantum Networks and Entanglement
Seungbeom Chin, Yong-Su Kim, Sangmin Lee
The indistinguishability of quantum particles is widely used as a resource for the generation of entanglement. Linear quantum networks (LQNs), in which identical particles linearly…
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…
Experimental implementation of arbitrary entangled operations
Seongjin Hong, Chang Hoon Park, Yeon-Ho Choi +4
Quantum entanglement lies at the heart of quantum mechanics in both fundamental and practical aspects. The entanglement of quantum states has been studied widely, however, the enta…
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…
Entangling Bosons through Particle Indistinguishability and Spatial Overlap
Mariana R. Barros, Seungbeom Chin, Tanumoy Pramanik +4
Particle identity and entanglement are two fundamental quantum properties that work as major resources for various quantum information tasks. However, it is still a challenging pro…
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…
Nonlocal quantum correlations under amplitude damping decoherence
Tanumoy Pramanik, Young-Wook Cho, Sang-Wook Han +3
Different nonlocal quantum correlations of entanglement, steering and Bell nonlocality are defined with the help of local hidden state (LHS) and local hidden variable (LHV) models.…
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…