11 papers · 1 filter
Spectral Minimax Direct Fidelity Estimation for Generic Target States
Hyunho Cha, Jungwoo Lee
Direct fidelity estimation benefits from tailoring measurements to a fixed target, but the operator-aware shadow importance sampling (OASIS) method optimizes an outcome-wise linear…
Toward the Goldilocks blind compression of quantum states
Hyunho Cha, Chae-Yeun Park, Jungwoo Lee
Quantum autoencoders (QAEs) are learning architectures that compress quantum data into a low-dimensional latent state while preserving the information needed for reconstruction. We…
Verifying random matrix product states with autoregressive local measurements
Hyunho Cha, Subin Kim, Jungwoo Lee
Matrix product states (MPS) are a central language for one-dimensional quantum matter and a practical target for near-term quantum simulators and variational algorithms. Yet, while…
Non-existence of stabilizer absolutely maximally entangled states across infinitely many configurations
Hyunho Cha
We prove a general reduction theorem for stabilizer absolutely maximally entangled states in composite local dimension. If a stabilizer state exists and $D=\pro…
QFlowNet: Fast, Diverse, and Efficient Unitary Synthesis with Generative Flow Networks
Inhoe Koo, Hyunho Cha, Jungwoo Lee
Unitary Synthesis, the decomposition of a unitary matrix into a sequence of quantum gates, is a fundamental challenge in quantum compilation. Prevailing reinforcement learning (RL)…
A dimension-independent strict submultiplicativity for the transposition map in diamond norm
Hyunho Cha
We prove that there exists an absolute constant such that for every finite dimension and every quantum channel on , $\left\|Θ\circ(\mathrm{i…