Fast Ground State to Ground State Separation of Small Ion Crystals
arXiv:2406.17750 · doi:10.1103/PhysRevA.110.042610
Abstract
Rapid separation of linear crystals of trapped ions into different subsets is critical for realizing trapped ion quantum computing architectures where ions are rearranged in trap arrays to achieve all-to-all connectivity between qubits. We introduce a general theoretical framework that can be used to describe the separation of same-species and mixed-species crystals into smaller subsets. The framework relies on an efficient description of the evolution of Gaussian motional states under quadratic Hamiltonians that only requires a special solution of the classical equations of motion of the ions to describe their quantum evolution under the influence of a time-dependent applied potential and the ions' mutual Coulomb repulsion. We provide time-dependent applied potentials suitable for separation of a mixed species three-ion crystal on timescales similar to that of free expansion driven by Coulomb repulsion, with all modes along the crystal axis starting and ending close to their ground states. Three separately-confined mixed species ions can be combined into a crystal held in a single well without energy gain by time-reversal of this separation process.
References in corpus (11)
- A Race Track Trapped-Ion Quantum Processor
- Complete methods set for scalable ion trap quantum information processing
- Fast atomic transport without vibrational heating
- Spin-motion entanglement and state diagnosis with squeezed oscillator wavepackets
- Experimental realization of fast ion separation in segmented Paul traps
- Dynamics and control of fast ion crystal splitting in segmented Paul traps
- Transport of multispecies ion crystals through a junction in an RF Paul trap
- Decoherence and dephasing errors caused by D.C. Stark effect in rapid ion transport
- Characterization of Fast Ion Transport via Position-Dependent Optical Deshelving
- Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators
- Low-excitation transport and separation of high-mass-ratio mixed-species ion chains