Reversing Hydride Ion Formation in Quantum Information Experiments with Be${}^{+}$

Abstract

We demonstrate photodissociation of BeH${}^{+}$ ions within a Coulomb crystal of thousands of ${}^9$Be${}^{+}$ ions confined in a Penning trap. Because BeH${}^{+}$ ions are created via exothermic reactions between trapped, laser-cooled Be${}^{+}$(${}^2{\text{P}}_{3/2}$) and background H${}_2$ within the vacuum chamber, they represent a major contaminant species responsible for infidelities in large-scale trapped-ion quantum information experiments. The rotational-state-insensitive dissociation scheme described here makes use of 157 nm photons to produce Be${}^{+}$ and H as products, thereby restoring Be${}^{+}$ ions without the need for reloading. This technique facilitates longer experiment runtimes at a given background H${}_2$ pressure, and may be adapted for removal of MgH${}^{+}$ and AlH${}^{+}$ impurities.

arXiv comment6 pages, 3 figures

References in corpus (18)

• 14-qubit entanglement: creation and coherence
• Engineered 2D Ising interactions on a trapped-ion quantum simulator with hundreds of spins
• Observation of entanglement propagation in a quantum many-body system
• Non-local propagation of correlations in long-range interacting quantum systems
• Dissipative production of a maximally entangled steady state
• Microwave quantum logic gates for trapped ions
• Complete methods set for scalable ion trap quantum information processing
• Addressing and manipulation of individual hyperfine states in cold trapped molecular ions and application to HD^{+} frequency metrology
• Spectroscopy and Thermometry of Drumhead Modes in a Mesoscopic Trapped-Ion Crystal using Entanglement
• Electronic structure of the Magnesium hydride molecular ion
• Molecular ion trap-depletion spectroscopy of BaCl${}^{+}$
• Observation of a rotational transition in trapped and sympathetically cooled molecular ions
• Spin Dephasing as a Probe of Mode Temperature, Motional State Distributions, and Heating Rates in a 2D Ion Crystal
• State-specific detection of trapped HfF${}^{+}$ by photodissociation
• Rotational State Analysis of AlH+ by Two-Photon Dissociation
• Decay rate measurement of the first vibrationally excited state of MgH${}^{+}$ in a cryogenic Paul trap
• Action spectroscopy of SrCl${}^{+}$ using an integrated ion trap time-of-flight mass spectrometer
• Effect of defects on the phonons and the effective spin-spin interactions of an ultracold Penning trap quantum simulator

Cited by in corpus (14)

• Quantum spin dynamics and entanglement generation with hundreds of trapped ions
• Simulating generic spin-boson models with matrix product states
• Closed-cycle, low-vibration 4 K cryostat for ion traps and other applications
• Ultra-low vibration closed-cycle cryogenic surface-electrode ion trap apparatus
• Trapping, cooling, and photodissociation analysis of state-selected H$\_2^{+}$ ions produced by (3+1) multiphoton ionization
• Probing large-scale magnetism with the Cosmic Microwave Background
• Site-resolved imaging of beryllium ion crystals in a high-optical-access Penning trap with inbore optomechanics
• Second-Scale ${}^9{\text{Be}}^{+}$ Spin Coherence in a Compact Penning Trap
• Increase of barium ion-trap lifetime via photodissociation
• Theoretical basis for quantum simulation with a planar ionic crystal in a Penning trap using a triangular rotating wall
• Rapid production of defect-free beryllium ion Coulomb crystals
• Determining Reaction Pathways at Low Temperatures by Isotopic Substitution: The Case of BeD+ + H2O
• Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
• Adiabatic Cooling of Planar Motion in a Penning Trap Ion Crystal to Sub-Millikelvin Temperatures