86 citations · 586 across the 33 of their papers we have counts for
7 papers · 1 filter
Coherent-disorder-driven complexity transitions in a quantum-advantage architecture
Sung-Bin B. Lee, Chae-Yeun Park, Changhun Oh +1
While decoherence is known to erode classical hardness in quantum random sampling, the impact of coherent spatial disorder remains an open question. We study a square-lattice insta…
Scalable projected entangled-pair state representation of random quantum circuit states
Sung-Bin B. Lee, Hee Ryang Choi, Daniel Donghyon Ohm +1
Classical simulation of a programmable quantum processor is crucial in identifying the threshold of a quantum advantage. We demonstrate the simple update of projected entangled-pai…
Macroscopic Quantum Entanglement of a Kondo Cloud at Finite Temperature
S. -S. B. Lee, Jinhong Park, H. -S. Sim
We propose a variational approach for computing the macroscopic entanglement in a many-body mixed state, based on entanglement witness operators, and compute the entanglement of fo…
Minimax optimization of entanglement witness operator for the quantification of three-qubit mixed-state entanglement
Sungguen Ryu, Seung-Sup B. Lee, H. -S. Sim
We develop a numerical approach for quantifying entanglement in mixed quantum states by convex-roof entanglement measures, based on the optimal entanglement witness operator and th…
Quantifying mixed-state quantum entanglement by optimal entanglement witness
S. -S. B. Lee, H. -S. Sim
We develop an approach of quantifying entanglement in mixed quantum states by the optimal entanglement witness operator. We identify the convex set of mixed states for which a sing…
Interferometric distillation and determination of unknown two-qubit entanglement
S. -S. B. Lee, H. -S. Sim
We propose a scheme for both distilling and quantifying entanglement, applicable to individual copies of an arbitrary unknown two-qubit state. It is realized in a usual two-qubit i…
Construction of optimal witness for unknown two-qubit entanglement
H. S. Park, S. -S. B. Lee, H. Kim +2
Whether entanglement in a state can be detected, distilled, and quantified without full state reconstruction is a fundamental open problem. We demonstrate a new scheme encompassing…