Karel Lemr

Detecting quantum non-breaking channels without entanglement

2021 · arXiv (Cornell University)

Quantum channels, which break entanglement, incompatibility, or nonlocality, are not useful for entanglement-based, one-sided device-independent, or device-independent quantum information processing, respectively. Here, we show that such breaking channels are related to certain temporal quantum correlations, …

Resource-efficient entanglement detection in high-dimensional states via two-qubit witnesses

2026 · Physical Review Research

This paper presents an efficient method for detecting entanglement in high-dimensional two-qudit states by mapping the Hilbert space onto the space of two qubits. This transformation enables the use of well-established two-qubit entanglement witnesses. The …