Quantum coherence bounds the distributed discords

Jin，Zhi Xiang1,2; Li-Jost，Xianqing2; Fei，Shao Ming3,4; Qiao，Cong Feng1,5

2022-12-01

10.1038/s41534-022-00543-1

npj Quantum Information   影响因子和分区

2056-6387

Establishing quantum correlations between two remote parties by sending an information carrier is an essential step of many protocols in quantum information processing. We obtain trade-off relations between discords and coherence within a bipartite system. Then we study the distribution of coherence in a bipartite quantum state by using the relations of relative entropy and mutual information. We show that the increase of the relative entropy of discord between two remote parties is bounded by the nonclassical correlations quantified by the relative entropy of coherence between the carrier and two remote parties, providing an optimal protocol for discord distribution and showing that quantum correlations are the essential resource for such tasks.

SCI ; EI

英语

通讯

National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[11635009];National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[11675113];National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[11847209];National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[11975236];Natural Science Foundation of Beijing Municipality[Z190005];

Physics

Quantum Science & Technology ; Physics, Applied ; Physics, Atomic, Molecular & Chemical ; Physics, Condensed Matter

WOS:000772419100002

NATURE PORTFOLIO

20221311845869

Economic and social effects ; Quantum optics

Thermodynamics:641.1 ; Light/Optics:741.1 ; Quantum Theory; Quantum Mechanics:931.4 ; Social Sciences:971

2-s2.0-85126838317

Scopus

1.School of Physics,University of Chinese Academy of Sciences,Beijing,Yuquan Road 19A,100049,China
2.Max Planck Institute for Mathematics in the Sciences,Leipzig,04103,Germany
3.School of Mathematical Sciences,Capital Normal University,Beijing,100048,China
4.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.CAS Center for Excellence in Particle Physics,Beijing,100049,China

Jin，Zhi Xiang,Li-Jost，Xianqing,Fei，Shao Ming,et al. Quantum coherence bounds the distributed discords[J]. npj Quantum Information,2022,8(1).

Jin，Zhi Xiang,Li-Jost，Xianqing,Fei，Shao Ming,&Qiao，Cong Feng.(2022).Quantum coherence bounds the distributed discords.npj Quantum Information,8(1).

Jin，Zhi Xiang,et al."Quantum coherence bounds the distributed discords".npj Quantum Information 8.1(2022).