论文标题
与碰撞石墨烯等血浆的非线性量子逻辑
Nonlinear quantum logic with colliding graphene plasmons
论文作者
论文摘要
石墨烯已成为一个有前途的平台，将非线性量子光学器件带到纳米级，在该平台上，大型固有的光学非线性可以使长期且可主动调谐的等离子体极性层强烈相互作用。在这里，我们从理论上研究了石墨烯纳米替比的两个反传播等离子体之间的碰撞，其中横向下波长限制赋予了传播等离子体的繁殖等离子，其中％有效的质量是平坦的带分散体，从而增强了它们的相互作用。这种情况为实施多模式极化大门带来了有趣的可能性，该门规定了shapiro no-go定理对非线性光纤中光子门的限制。作为一个范式示例，我们证明了高保真条件性PI相位移位（CZ）的可行性，其中栅极性能从根本上受到单平面寿命的限制。这些结果为量子信息和多体应用程序开辟了新的令人兴奋的途径，并具有强烈的相互关系。
Graphene has emerged as a promising platform to bring nonlinear quantum optics to the nanoscale, where a large intrinsic optical nonlinearity enables long-lived and actively tunable plasmon polaritons to strongly interact. Here we theoretically study the collision between two counter-propagating plasmons in a graphene nanoribbon, where transversal subwavelength confinement endows propagating plasmons with %large effective masses a flat band dispersion that enhances their interaction. This scenario presents interesting possibilities towards the implementation of multi-mode polaritonic gates that circumvent limitations imposed by the Shapiro no-go theorem for photonic gates in nonlinear optical fibers. As a paradigmatic example we demonstrate the feasibility of a high fidelity conditional Pi phase shift (CZ), where the gate performance is fundamentally limited only by the single-plasmon lifetime. These results open new exciting avenues towards quantum information and many-body applications with strongly-interacting polaritons.
