Dipole-Phonon Quantum Logic with Trapped Polar Molecular Ions
Dipole-Phonon Quantum Logic with Trapped Polar Molecular Ions
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DOI：
10.1103/physrevlett.125.120501
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发表时间：
2020-09-14
影响因子：
8.6
通讯作者：
Hudson, Eric R.
中科院分区：
文献类型：
--
作者：
Campbell, Wesley C.;Hudson, Eric R.
被捕获的分子离子的电偶极矩与受限库仑晶体的声子模式之间的相互作用将分子的方向与其运动耦合起来。我们考虑利用这种相互作用来初始化、处理和读出分子离子量子位中编码的量子信息的实际可行性，而无需光学照明分子。我们提出了两种方案，其中分子离子可以与共捕获的原子离子量子位纠缠，除其他外，提供了分子态制备和测量的手段。我们还表明，虚拟声子交换可以显着提高分子间偶极子-偶极子相互作用的范围，从而允许广泛分离的分子离子量子位之间的强耦合。
The interaction between the electric dipole moment of a trapped molecular ion and the phonon modes of the confined Coulomb crystal couples the orientation of the molecule to its motion. We consider the practical feasibility of harnessing this interaction to initialize, process, and read out quantum information encoded in molecular ion qubits without ever optically illuminating the molecules. We present two schemes wherein a molecular ion can be entangled with a cotrapped atomic ion qubit, providing, among other things, a means for molecular state preparation and measurement. We also show that virtual phonon exchange can significantly boost the range of the intermolecular dipole-dipole interaction, allowing strong coupling between widely separated molecular ion qubits.