Experimentally obtaining maximal coherence via assisted distillation process

• DOI: 10.1364/optica.4.000454
• Publication Date: 2017-04-13T21:45:15Z
• Authors: Kang-Da Wu; Zhibo Hou; Han-Sen Zhong; Yuan Yuan; Guo-Yong Xiang; Chuan-Feng Li; Guang-Can Guo
• Keywords: Quantum Physics; 0103 physical sciences; FOS: Physical sciences; 81-05; Quantum Physics (quant-ph); 01 natural sciences; Physics - Optics; Optics (physics.optics)

Quantum coherence, which quantifies the superposition properties of a quantum state, plays an indispensable role in quantum resource theory. A recent theoretical work [Phys. Rev. Lett. \textbf{116}, 070402 (2016)] studied the manipulation of quantum coherence in bipartite or multipartite systems under the protocol Local Incoherent Operation and Classical Communication (LQICC). Here we present the first experimental realization of obtaining maximal coherence in assisted distillation protocol based on linear optical system. The results of our work show that the optimal distillable coherence rate can be reached even in one-copy scenario when the overall bipartite qubit state is pure. Moreover, the experiments for mixed states showed that distillable coherence can be increased with less demand than entanglement distillation. Our work might be helpful in the remote quantum information processing and quantum control.<br/>7 pages, 5 figures<br/>