Pei Zeng

Reference-Frame-Independent Design of Phase-Matching Quantum Key Distribution

2021 · Physical Review Applied

The recently proposed phase-matching quantum key distribution offers means to overcome the linear key rate--transmittance bound. Since the key information is encoded onto the phases of coherent states, the misalignment between the two remote reference …

Dark Spin-Cat States as Biased Qubits

2025 · Physical Review Letters

We present a biased atomic qubit, universally implementable across all atomic platforms, encoded as a "spin cat" within ground state Zeeman levels. The key characteristic of our configuration is the coupling of the ground state …