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Trapped-Ion Technologies for Scalable Quantum Information Processing

Individual atomic ions can form well-controlled quantum bits with long coherence times. We are working to make large-scale quantum information processors through the development of integrated control and readout technologies.

Lincoln Laboratory Staff

John Chiaverini, Jeremy Sage, Robert McConnell, Colin Bruzewicz

University Faculty

Isaac Chuang (MIT, Physics and EECS), Rajeev Ram (MIT, EECS)


This is an end-on view of a two-dimensional magneto-optical trap (2DMOT) containing calcium atoms cooled to a few milliKelvin (small circular cloud at center of image). The cooled atoms are then accelerated toward the ion-trap chip where they are ionized and recaptured.

Motivation
  • Develop high-fidelity quantum logic and rapid ion movement within large arrays using scalable control technology

Project Goals
  • Investigate and mitigate anomalous electric-field ion heating through surface preparation and height dependence
  • Develop FPGA-based electronic control system for movement of ions using on-chip integrated CMOS electronics and the testing of movement control with this system.

A close-up micrograph of a chip containing integrated avalanche photodiodes (APDs) and ion-trap electrodes. This view is of several auxiliary test APDs and bond pads near the larger trap electrodes.

Motivation
  • Provide high-extinction, on-chip quantum-logic-beam control and fast, low cross-talk quantum-state readout

Project Goals
  • Develop novel methods and materials for making high-extinction modulators for integrated photonic waveguides operating near 400 nm
  • Improve efficiency and dark-count rate in CMOS-fabricated avalanche photodiodes (APDs)
Project Goals
  • Design an optical and microwave resonator to enhance the capability of NV magnetic field sensors
  • Develop laser threshold magnetometry using a whispering gallery mode resonator
Motivation
  • Develop power-budget-optimized quantum sensors in a compact form factor

Image

This diamond optical micro-resonator may enable resonant interaction with the NV’s within and allow for enhanced sensors.