In this paper, we investigate the cohering and decohering power of the one-qubit Markovian channels with respect to coherence measures based on the l1-norm, the Renyi a-relative entropy and the Tsallis a-relative entr...In this paper, we investigate the cohering and decohering power of the one-qubit Markovian channels with respect to coherence measures based on the l1-norm, the Renyi a-relative entropy and the Tsallis a-relative entropy of coherence, respectively. The amplitude damping channel, phase damping channel, depolarizing channel, and flip channels axe analytically calculated. It shows that the decohering power of the amplitude damping channel on the x, y, and z basis is equal to each other. The same phenomenon can be seen for the phase damping channel and the flip channels. The cohering power for the phase damping channel and the flip channels on the x, y basis also equals to that on the z basis. However, the cohering and decohering power of the depolaxizing channel is independent to the reference basises. And the cohering power of the amplitude damping channel on the x, y basis is different to that on the z basis.展开更多
The phenomenon of pseudogap and Fermi arcs has been a long-standing puzzle in the field of unconventional superconductivity(SC).Since first discovered in underdoped cuprates[1],the pseudogap has been generally identif...The phenomenon of pseudogap and Fermi arcs has been a long-standing puzzle in the field of unconventional superconductivity(SC).Since first discovered in underdoped cuprates[1],the pseudogap has been generally identified in various(quasi)two-dimensional(2D)contexts,including thin-film FeSe[2],layered heavy fermion systems[3],magic angle twisted bilayer graphene[4],and recently even ultra-cold atoms[5].One prominent explanation for the pseudogap is hence to treat it as a precursor of pairing due to phase decoherence.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.11271237,11671244the Higher School Doctoral Subject Foundation of Ministry of Education of China under Grant No.20130202110001the Central Universities under Grants Nos.2016TS060 and 2016CBY003
文摘In this paper, we investigate the cohering and decohering power of the one-qubit Markovian channels with respect to coherence measures based on the l1-norm, the Renyi a-relative entropy and the Tsallis a-relative entropy of coherence, respectively. The amplitude damping channel, phase damping channel, depolarizing channel, and flip channels axe analytically calculated. It shows that the decohering power of the amplitude damping channel on the x, y, and z basis is equal to each other. The same phenomenon can be seen for the phase damping channel and the flip channels. The cohering power for the phase damping channel and the flip channels on the x, y basis also equals to that on the z basis. However, the cohering and decohering power of the depolaxizing channel is independent to the reference basises. And the cohering power of the amplitude damping channel on the x, y basis is different to that on the z basis.
基金supported by the National Key R&D Program of China(2022YFA1402702,2021YFA1401400,and 2022YFA1403402)the National Natural Science Foundation of China(12447103,12274289,12174068,and 12374144)+3 种基金the Innovation Program for Quantum Science and Technology(2021ZD0301902)the Science and Technology Commission of Shanghai Municipality(24LZ1400100,23JC1400600)support of Yangyang Development Fund,Shanghai Jiao Tong University 2030 Initiative,and startup funds from SJTUsupport of Shuguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission。
文摘The phenomenon of pseudogap and Fermi arcs has been a long-standing puzzle in the field of unconventional superconductivity(SC).Since first discovered in underdoped cuprates[1],the pseudogap has been generally identified in various(quasi)two-dimensional(2D)contexts,including thin-film FeSe[2],layered heavy fermion systems[3],magic angle twisted bilayer graphene[4],and recently even ultra-cold atoms[5].One prominent explanation for the pseudogap is hence to treat it as a precursor of pairing due to phase decoherence.
