Motional squeezing for trapped ion transport and separation

Abstract

Transport, separation, and merging of trapped ion crystals are essential operations for most large-scale quantum computing architectures. In this work, we develop a theoretical framework that describes the dynamics of ions in time-varying potentials with a motional squeeze operator, followed by a motional displacement operator. Using this framework, we develop a new, general protocol for trapped ion transport, separation, and merging. We show that motional squeezing can prepare an ion wave packet to enable transfer from the ground state of one trapping potential to another. The framework and protocol are applicable if the potential is harmonic over the extent of the ion wave packets at all times. As illustrations, we discuss two specific operations: changing the strength of the confining potential for a single ion, and separating same-species ions with their mutual Coulomb force. Both of these operations are, ideally, free of residual motional excitation.

References in corpus (25)

• Quantum Computing
• Experimental issues in coherent quantum-state manipulation of trapped atomic ions
• Quantum computing with trapped ions
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
• Demonstration of the trapped-ion quantum-CCD computer architecture
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Single-qubit quantum memory exceeding $10$-minute coherence time
• Quantum harmonic oscillator state synthesis by reservoir engineering
• Coherent Diabatic Ion Transport and Separation in a Multi-Zone Trap Array
• Fast atomic transport without vibrational heating
• Quantum amplification of mechanical oscillator motion
• High fidelity transport of trapped-ion qubits through an X-junction trap array
• Quantum amplification of boson-mediated interactions
• Particle pair creation by inflation of quantum vacuum fluctuations in an ion trap
• Experimental realization of fast ion separation in segmented Paul traps
• A proposal for a scalable universal bosonic simulator using individually trapped ions
• Fast transport of mixed-species ion chains within a Paul trap
• Dynamics and control of fast ion crystal splitting in segmented Paul traps
• Fast separation of two trapped ions
• Decoherence and dephasing errors caused by D.C. Stark effect in rapid ion transport
• Shortcuts to Squeezed Thermal States
• Extended Gaussian wave packet dynamics
• Rapid laser-free ion cooling by controlled collision

Cited by in corpus (4)

• $N$-body interactions between trapped ion qubits via spin-dependent squeezing
• One- and two-qubit gate infidelities due to motional errors in trapped ions and electrons
• Tailored Ion Beam for Precise Color Center Creation
• Characterization and optimized engineering of bosonic quantum interfaces under single-mode operational constraints