Disorder-independent hole spin manipulation by hopping
Univ. Grenoble Alpes（格勒诺布尔阿尔卑斯大学）；CEA（法国原子能和替代能源委员会）；Leti（技术研究与集成实验室）；IRIG-MEM-L_Sim；Quantum Advanced Research Center (QuARC)（量子先进研究中心）；Consejo Superior de Investigaciones Científicas (CSIC)（西班牙高等科学研究理事会）；Instituto de Ciencia de Materiales de Madrid (ICMM)（马德里材料科学研究所）
Biel Martinez, Ana Sempere-Sanchis, José C. Abadillo-Uriel, Yann-Michel Niquet
Spin manipulation by hopping has recently emerged as a promising strategy to control hole spins in quantum dots using exclusively baseband control, thereby mitigating power dissipation and high-frequency management constraints in large-scale architectures. Unlike conventional approaches such as electron dipole spin resonance (EDSR), this mechanism exploits dot-to-dot variations of the spin precession axes to enable spin rotations. However, it is intrinsically disorder-dependent: in the absence of sufficient variability, the precession axes remain aligned and spin manipulation becomes ineffective. This fundamental reliance on disorder raises concerns regarding its compatibility with the long-term evolution of spin-qubit platforms toward improved material quality, cleaner interfaces, and enhanced device reproducibility. Here, we numerically assess the viability of spin manipulation by hopping as a function of disorder strength and demonstrate that its implementation is indeed increasingly constrained as disorder is reduced. To overcome this limitation, we propose an alternative strategy based on hopping between intentionally squeezed quantum dots. This approach retains the advantages of baseband control while being independent of disorder and robust against moderate variability, thereby offering improved prospects for scalable hole-spin quantum computing architectures.
A Flickering Resonance Degeneracy on Entropy-Ruled Charge Transport in the Extended Hopping Sites for Biological Systems: Role of Static-to-Dynamic Disorder Transition
KPR Institute of Engineering and Technology（KPR工程学院与技术学院）
Low-Disorder Microwave Cavity Lattices for Quantum Simulation with Photons
我们通过实验评估了耦合传输线谐振器在光的量子相变研究中的适用性。我们已经测量了具有低光子跳跃率t/2 pi = 0.8MHz的器件，以量化单个腔频率中的无序。观察到的无序与制造中的小缺陷一致。我们研究了无序度对传输线几何形状的依赖性，并利用我们的结果制造出了无序度小于2/10的器件。具有高光子跳跃率t/2 pi = 31 MHz的器件的简正模谱显示出很小的无序效应，使得谐振器阵列成为研究光子凝聚态物理的良好骨干。
Interaction effects on 2D fermions with random hopping
我们研究了一般短程相互作用对二维狄拉克费米子系统的影响，该系统受到一种特殊的静态无序，通常被称为“手性”。非相互作用系统是无序类BDI [M. R. Zirnbauer，J.Math.Phys.37，4986（1996）]。例如，它是对蜂窝晶格上无自旋费米子的时间反演不变紧束缚模型的低能描述，该模型受随机跳跃的影响，具有粒子-空穴对称性。众所周知，在没有相互作用的情况下，这种无序系统的特殊之处在于它不局限于2D，而是具有扩展态和在零能量下的有限电导率，以及强发散的低能量密度态。在跳跃模型的上下文中，我们考虑的短程相互作用是粒子-空穴对称密度-密度相互作用。使用微扰单圈重整化群分析，我们表明，在非相互作用系统中的状态密度的发散负责相同的机制导致不稳定性，其中的相互作用驱动强烈相关的无序。这个结果应该与二维中干净狄拉克费米子的极限形成对比，后者在包含弱短程相互作用时是稳定的。我们的工作提出了一种新的机制，其中一个干净的系统，最初不敏感的相互作用的影响，可以不稳定的相互作用后，列入弱静态无序。
