56 citations · 169 across the 21 of their papers we have counts for
21 papers · 1 filter
Quantum Metrology for Signals with an Unknown Causal Structure
Gwon Ryul Han, Hyukgun Kwon, Seok Hyung Lie
Quantum sensing protocols usually presuppose where and when each signal acts, yet this information is unavailable beforehand in experiments such as scattering and radar. We show th…
Ultimate Information Rate for Quantum Sensing under Multilevel Relaxation
Changhun Oh, Seok Hyung Lie, Youngrong Lim
We determine the ultimate information rate of a relaxing multilevel quantum sensor under unrestricted adaptive control and construct an explicit strategy that attains it. We consid…
Manipulating heterogeneous quantum resources over a network
Ray Ganardi, Jeongrak Son, Jakub Czartowski +2
Quantum information processing relies on a variety of resources, including entanglement, coherence, non-Gaussianity, and magic. In realistic settings, protocols run on networks of…
Universal Sample Complexity Bounds in Quantum Learning Theory via Fisher Information Matrix
Hyukgun Kwon, Seok Hyung Lie, Liang Jiang
We show that the sample complexity required in quantum learning theory within a general parametric framework is fundamentally governed by the inverse Fisher information matrix. Mor…
Thermal operations from informational equilibrium
Seok Hyung Lie, Jeongrak Son, Paul Boes +2
Thermal operations are quantum channels that have taken a prominent role in deriving fundamental thermodynamic limitations in quantum systems. We show that these channels are uniqu…
Probing Quantum States over Spacetime Through Interferometry
Seok Hyung Lie, Hyukjoon Kwon
Establishing a notion of the quantum state that applies consistently across space and time could be a crucial step toward formulating a relativistic quantum theory. We give an oper…
Catalytic channels are the only noise-robust catalytic processes
Jeongrak Son, Ray Ganardi, Shintaro Minagawa +3
Catalysis refers to the possibility of enabling otherwise inaccessible quantum state transitions by supplying an auxiliary system, provided that the auxiliary is returned to its in…
Multipartite quantum states over time from two fundamental assumptions
Seok Hyung Lie, James Fullwood
The theory of quantum states over time extends the density operator formalism into the temporal domain, providing a unified of treatment of timelike and spacelike separated systems…
Uniqueness of quantum state over time function
Seok Hyung Lie, Nelly H. Y. Ng
A fundamental A fundamental asymmetry exists within the conventional framework of quantum theory between space and time, in terms of representing causal relations via quantum chann…
Quantum operations with the time axis in a superposed direction
Seok Hyung Lie, M. S. Kim
In the quantum theory, it has been shown that one can see if a process has the time reversal symmetry by applying the matrix transposition and examining if it remains physical. How…
Catalysis always degrades external quantum correlations
Seok Hyung Lie, Nelly H. Y. Ng
Catalysts used in quantum resource theories need not be in isolation and therefore are possibly correlated with external systems, which the agent does not have access to. Do such c…
Delocalized and Dynamical Catalytic Randomness and Information Flow
Seok Hyung Lie, Hyunseok Jeong
We generalize the theory of catalytic quantum randomness to delocalized and dynamical settings. First, we expand the resource theory of randomness (RTR) by calculating the amount o…
Faithfulness and sensitivity for ancilla-assisted process tomography
Seok Hyung Lie, Hyunseok Jeong
A system-ancilla bipartite state capable of containing the complete information of an unknown quantum channel acting on the system is called faithful. The equivalence between faith…
Repeated Extraction of Scrambled Quantum Data: Sustainability of the Hayden-Preskill Type Protocols
Seok Hyung Lie, Yong Siah Teo, Hyunseok Jeong
We introduce and study the problem of scrambler hacking, which is the procedure of quantum information extraction from and installation on a quantum scrambler given only partial ac…
Hacking Quantum Networks: Extraction and Installation of Quantum Data
Seok Hyung Lie, Yong Siah Teo, Hyunseok Jeong
We study the problem of quantum hacking, which is the procedure of quantum-information extraction from and installation on a quantum network given only partial access. This problem…
Correlational Resource Theory of Catalytic Quantum Randomness under Conservation Law
Seok Hyung Lie, Hyunsek Jeong
Catalysts are substances that assist transformation of other resourceful objects without being consumed in the process. However, the fact that their `catalytic power' is limited an…
The Min-entropy as a Resource for One-Shot Private State Transfer, Quantum Masking and State Transition
Seok Hyung Lie, Seongjeon Choi, Hyunseok Jeong
We give an operational meaning to the min-entropy of a quantum state as a resource measure for various interconnected tasks. In particular, we show that the min-entropy without smo…
Randomness for quantum channels:Genericity of catalysis and quantum advantage of uniformness
Seok Hyung Lie, Hyunseok Jeong
Randomness can help one to implement quantum maps that cannot be realized in a deterministic fashion. Recently, it was discovered that explicitly treating a randomness source as a…
Optimal Distributed quantum sensing using Gaussian states
Changhun Oh, Changhyoup Lee, Seok Hyung Lie +1
We find and investigate the optimal scheme of quantum distributed Gaussian sensing for estimation of the average of independent phase shifts. We show that the ultimate sensitivity…
Randomness cost of masking quantum information and the information conservation law
Seok Hyung Lie, Hyunseok Jeong
Masking quantum information, which is impossible without randomness as a resource, is a task that encodes quantum information into bipartite quantum state while forbidding local pa…
Quantum one-time tables for unconditionally secure qubit-commitment
Seok Hyung Lie, Hyukjoon Kwon, M. S Kim +1
The commodity-based cryptography is an alternative approach to realize conventionally impossible cryptographic primitives such as unconditionally secure bit-commitment by consuming…