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quant-ph2026
Optimal copy complexity of quantum state cloning
Sangwoo Jeon, Vaughn Sohn, Changhun Oh
Quantum state cloning is the task of approximately producing additional copies of an unknown quantum state from a finite number of input copies. The optimal cloning fidelity is kno…
quant-ph2026
Bound Entanglement Is Insufficient for an Exponential Quantum Learning Advantage
Hyeongu Kang, Sangwoo Jeon, Changhun Oh
While entanglement is known to enable exponential improvements in the sample complexity of quantum learning, it remains unclear which properties of entangled resources are responsi…
quant-ph2025
On the query complexity of unitary channel certification
Sangwoo Jeon, Changhun Oh
Certifying the correct functioning of a unitary channel is a critical step toward reliable quantum information processing. In this work, we investigate the query complexity of the…