论文标题
使用Bose-Einstein冷凝物中的集体激发的量子寄存器
A quantum register using collective excitations in a Bose-Einstein condensate
论文作者
论文摘要
由原子集合组成的量子由于其对原子损失的抵抗力而具有吸引力，并且许多提议意识到这种量子的提议是基于Rydberg封锁效应的。在这项工作中，我们考虑了一种实验可行的方案，可以一致地从空间重叠的玻色 - 国家凝结物中加载自旋依赖的光学晶格。将每个晶格位点识别为一个量子位，以空或填充的位点为量子基础，我们讨论了如何进行高保真的单量子操作，任意量子对之间的两个Qubit大门以及可以执行非损坏的测量值。在这种设置中，原子损失的效果已经得到缓解，不需要从基态歧管中去除原子，并且不需要量子的单独的存储和计算库，所有这些原子都可以在许多其他类型的原子码头中都具有重要的反应来源。
A qubit made up of an ensemble of atoms is attractive due to its resistance to atom losses, and many proposals to realize such a qubit are based on the Rydberg blockade effect. In this work, we instead consider an experimentally feasible protocol to coherently load a spin-dependent optical lattice from a spatially overlapping Bose--Einstein condensate. Identifying each lattice site as a qubit, with an empty or filled site as the qubit basis, we discuss how high-fidelity single-qubit operations, two-qubit gates between arbitrary pairs of qubits, and nondestructive measurements could be performed. In this setup, the effect of atom losses has been mitigated, the atoms never need to be removed from the ground state manifold, and separate storage and computational bases for the qubits are not required, all of which can be significant sources of decoherence in many other types of atomic qubits.
