Decoherence for a two-qubit system in a spin-chain environment<xref rid="cpb_27_9_090302_fn1" ref-type="fn">*</xref><fn id="cpb_27_9_090302_fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant No. 11404246) and the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2017MF040).</p></fn>

Decoherence for a two-qubit system in a spin-chain environment**

Project supported by the National Natural Science Foundation of China (Grant No. 11404246) and the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2017MF040).

Yang Yang^{1, †}, Wang An-Min², Cao Lian-Zhen¹, Zhao Jia-Qiang¹, Lu Huai-Xin¹

(color online) (a) The relative entropy coherence C_r and (b) the l₁ norm of coherence C_l₁ as a function of t and λ for N = 100, c₃ = 0.8, and δ = 0.1.