Fabrication and operation of a two-dimensional ion-trap lattice on a high-voltage microchip

Abstract

Microfabricated ion traps are a major advancement towards scalable quantum computing with trapped ions. The development of more versatile ion-trap designs, in which tailored arrays of ions are positioned in two dimensions above a microfabricated surface, will lead to applications in fields as varied as quantum simulation, metrology and atom-ion interactions. Current surface ion traps often have low trap depths and high heating rates, because of the size of the voltages that can be applied to them, limiting the fidelity of quantum gates. Here we report on a fabrication process that allows for the application of very high voltages to microfabricated devices in general and use this advance to fabricate a two-dimensional ion-trap lattice on a microchip. Our microfabricated architecture allows for reliable trapping of two-dimensional ion lattices, long ion lifetimes, rudimentary shuttling between lattice sites and the ability to deterministically introduce defects into the ion lattice.

Collective Modes in the Cooperative Jahn–Teller Model: Path Integral Approach

“…The ion trap based realization of the cJT model offers unique opportunity to easy tuning the parametric regime of the couplings by adjusting for example the trap frequencies and the laser intensity. Although with the current ion technologies the realization of the model is restricted to one-dimension where the ions are placed in a chain, considerable progress is achieved to scaling to two-dimensional ion trap network where the ions are trapped in individual potential wells [20,21].…”

The UK National Quantum Technologies Hub in sensors and metrology (Keynote Paper)

“…Based on previous demonstration work we will develop a cold atom magnetic microscope 17,18 with 1D-imaging over mm-scale with micron resolution and stroboscopic analysis of dynamic processes and an ion array 12 gradient magnetometer device for mm-cm scale with noise suppression, which have no counterparts on the market. In addition the Hub works on >cm scale magnetic sensing with thermal atoms in microcells for operation at sensitivities competitive with superconducting quantum interference devices (SQUIDs) and significantly reduced cost and environmental demands.…”

“…Our Hub brings together experts on atom/ion chip development, self-contained vacuum systems and silica photonics, to provide compact, integrated and robust systems that are scalable for mass-production. Based on our state-of-the-art ion chips with world-leading voltage breakdown 11 , we will deliver ion array chips based on our pioneering work 12 in order to overcome the single ion limit in magnetometry and, potentially, clocks. We use more than 60 years of industrial vacuum electronics experience and detailed cold-atom vacuum developments 13 to develop self-contained pump-less vacuum enclosures, which can be produced at a low cost and in large numbers.…”

Technologies for trapped-ion quantum information systems

“…Silicon substrates have been used in trap construction before, but none of these traps have had doped, active device fabrication available, and only a few metal layers (four maximum) have been implemented to date [151][152][153][154][155][156][157][158]. Adapted from Ref.…”