University of California, Merced, 5200 North Lake Road, Merced, California 95343, USA.
Phys Rev Lett. 2011 Jun 24;106(25):257002. doi: 10.1103/PhysRevLett.106.257002. Epub 2011 Jun 22.
We present a scheme for the deterministic generation of entangled photon pairs in a superconducting resonator array. The resonators form a Jaynes-Cummings lattice via the coupling to superconducting qubits, and the Kerr-like nonlinearity arises due to the coupling. We show that entangled photons can be generated on demand by applying spectroscopic techniques and exploiting the nonlinearity and symmetry in the resonators. The scheme is robust against small parameter spreads due to fabrication errors. Our findings can be used as a key element for quantum information processing in superconducting quantum circuits.
我们提出了一种在超导谐振器阵列中确定性地产生纠缠光子对的方案。通过与超导量子比特的耦合，谐振器形成了一个 Jaynes-Cummings 晶格，而类似 Kerr 的非线性则由耦合产生。我们表明，通过应用光谱技术并利用谐振器中的非线性和对称性，可以按需产生纠缠光子。该方案对由于制造误差引起的小参数扩展具有鲁棒性。我们的发现可作为超导量子电路中量子信息处理的关键元件。
