2016/08/06 by Feng Zhu, Wei Zhang, Sijing Chen +3 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Entropy (arrow of time) #Generalized relative entropy #Joint quantum entropy #Mathematics #Open quantum system #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum discord #Quantum mechanics #Quantum relative entropy #Statistical physics #Theoretical physics #quant-ph
paper · pdf · doi:10.1103/physreva.94.062340
published as Phys. Rev. A 94, 062340 (2016)
arxiv created 2016/08/06 · openalex publication_date 2016/12/30 · arxiv updated 2017/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In quantum information processing, it is important to witness the entropy of the message in the device-independent way which was proposed recently [R. Chaves, J. B. Brask, and N. Brunner, Phys. Rev. Lett. 115, 110501 (2015)]. In this paper, we theoretically obtain the minimal quantum entropy for three widely used linear dimension witnesses, which is considered ``a difficult question.'' Then we experimentally test the classical and quantum entropy in a device-independent manner. The experimental results agree well with the theoretical analysis, demonstrating that entropy is needed in quantum systems that is lower than the entropy needed in classical systems with the given value of the dimension witness.