Commuting quantum operations factorise
with Renato Renner
Consider two maps acting on a joint Hilbert space. What properties do they need to exhibit to be able to write them as a tensor product of maps? This can be regarded as a „fully quantum“ version of Tsirelson’s problem, and the answer can be found in our latest work!
Journal: Communications in Mathematical Physics 407, 148 (2026)
ArXiv: 2308.05792
Entanglement detection by violations of noisy uncertainty relations: A proof of principle
with Yuan-Yuan Zhao, Guo-Yong Xiang, Xiao-Min Hu, Bi-Heng Liu, Chuan-Feng Li, Guang-Can Guo, René Schwonnek
(This is not directly quantum cryptography, but more generally quantum information theory. However, this is the category where it fits best.)
Here, we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise.
Journal: Physical Review Letters 122, 220401 (2019)
ArXiv: 1810.05588
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