论文标题
使用量子测量来解决能量和位置空间中的非平衡近代单元
Resolving the nonequilibrium Kondo singlet in energy- and position-space using quantum measurements
论文作者
论文摘要
近托效应是强相关物理学的标志，其特征是在低温下磁性杂质周围形成了延长的单线状态云。尽管已经验证了Kondo Cloud存在的许多含义，但尚未直接证明Singlet Cloud本身的存在。我们通过考虑没有经典类似物的可观察到的可观察到的途径，但在实验上仍可衡量：“单重量重量”或对特定纠缠的两个粒子状态的投影。使用近似理论参数，我们表明可以构建高度特异性的能量和位置分辨的近代相关性探针。此外，我们考虑了可以通过偏置电压从平衡中驱动平衡的量子传输设置。在那里，我们表明，即使近托效应却因其而削弱了杂种效应，因此旋转的重量会增强。这揭示了一种非平衡机制，用于产生与其平衡对应物固有不同不同的近关系纠缠。
The Kondo effect, a hallmark of strong correlation physics, is characterized by the formation of an extended cloud of singlet states around magnetic impurities at low temperatures. While many implications of the Kondo cloud's existence have been verified, the existence of the singlet cloud itself has not been directly demonstrated. We suggest a route for such a demonstration by considering an observable that has no classical analog, but is still experimentally measurable: "singlet weights", or projections onto particular entangled two-particle states. Using approximate theoretical arguments, we show that it is possible to construct highly specific energy- and position-resolved probes of Kondo correlations. Furthermore, we consider a quantum transport setup that can be driven away from equilibrium by a bias voltage. There, we show that singlet weights are enhanced by voltage even as the Kondo effect is weakened by it. This exposes a patently nonequilibrium mechanism for the generation of Kondo-like entanglement that is inherently different from its equilibrium counterpart.
