论文标题
连续变化的量子状态传送中的铃铛测量的参数放大器
Parametric amplifier for Bell measurement in continuous-variable quantum state teleportation
论文作者
论文摘要
一个参数放大器本质上是一种线性四端口设备，在放大并将它们发送到两个输出端口之前，将两个输入耦合并线性混合。在这里，我们表明，对于正交相位幅度，参数放大器可以替换梁拆分器以扮演混合器的角色。我们将此想法应用于连续变量的量子状态传送方案，其中参数放大器在贝尔测量中取代了光束分离器。我们表明，该方案在贝尔测量过程中具有耐损耗，因此证明了PA在量子测量中的应用中比BS的优势。
A parametric amplifier is in essence a linear four-port device, which couples and linearly mixes two inputs before amplifying and sending them to two output ports. Here, we show that for quadrature-phase amplitudes, a parametric amplifier can replace beam splitters to play the role of mixer. We apply this idea to a continuous-variable quantum state teleportation scheme in which a parametric amplifier replaces a beam splitter in Bell measurement. We show that this scheme is loss-tolerant in the Bell measurement process and thus demonstrate the advantage of PA over BS in the applications in quantum measurement.
