论文标题
在无序环境中旋转的消除和去相关
Dephasing and Decorrelation of Spins in a Disordered Environment
论文作者
论文摘要
旋转的Dephasing是扩大量子计算系统大小的主要障碍。我们探讨了利用高度无序环境的可能性，这些环境处于多体局部阶段以阻止这种方式。 We embedded 2 `special' spins in such a highly disordered environment of Heisenberg spins to act as the target qubits and use the long-time value of the spin-spin correlator $\langle \vecσ_i \cdot \vecσ_j\rangle$ as an order parameter to quantify the transition between the thermal and MBL phases of this system.可以看出，当系统完全局部时，在该相关器中编码的旋转之间的脱粒会阻碍在无序环境中。顺序参数产生一个关键的指数，以表征热和MBL相之间的过渡，这似乎对系统的显微镜参数的变化或一对自旋的选择是可靠的。
Dephasing of spins is a major roadblock to scaling up the size of quantum computing systems. We explore the possibility of utilizing highly disordered environments which are in the Many-Body Localized phase to arrest this dephasing. We embedded 2 `special' spins in such a highly disordered environment of Heisenberg spins to act as the target qubits and use the long-time value of the spin-spin correlator $\langle \vecσ_i \cdot \vecσ_j\rangle$ as an order parameter to quantify the transition between the thermal and MBL phases of this system. It is seen that the dephasing between spins, as encoded in this correlator, is impeded in a disordered environment when the system is fully localized. The order parameter yields a critical exponent, to characterize the transition between the thermal and MBL phases, that appears to be robust to changes in microscopic parameters of the system or the choice of pair of spins.
