Experimental implementation of a continuous-time quantum random walk on a solid-state quantum information processor<xref rid="cpb_28_11_110302fn1" ref-type="fn">*</xref><fn id="cpb_28_11_110302fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306600 and 2016YFB0501603), the National Natural Science Foundation of China (Grant No. 11761131011), the Fund from the Chinese Academy of Sciences (Grant Nos. GJJSTD20170001, QYZDYSSWSLH004, and QYZDB-SSW-SLH005), the Anhui Initiative Fund in Quantum Information Technologies, China (Grant No. AHY050000), and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.</p></fn>

Experimental implementation of a continuous-time quantum random walk on a solid-state quantum information processor**

Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306600 and 2016YFB0501603), the National Natural Science Foundation of China (Grant No. 11761131011), the Fund from the Chinese Academy of Sciences (Grant Nos. GJJSTD20170001, QYZDYSSWSLH004, and QYZDB-SSW-SLH005), the Anhui Initiative Fund in Quantum Information Technologies, China (Grant No. AHY050000), and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.

Tusun Maimaitiyiming^{1, 2, 3, 4}, Wu Yang^{1, 2, 3}, Liu Wenquan^{1, 2, 3}, Rong Xing^{1, 2, 3, †}, Du Jiangfeng^{1, 2, 3, ‡}

Schematics of NV center in diamond. (a) Atomic structure. (b) Energy levels. The experiments were implemented on the two-qubit system which is composed of four energy levels marked by blue color. The four levels, |m_S = 0, m_I = +1 ⟩, |m_S = 0, m_I = 0⟩, |m_S = −1, m_I = + 1⟩, and |m_S = −1, m_I = 0 ⟩, are denoted by |0⟩, |1⟩, |2⟩, and |3⟩.