Engineering of microfabricated ion traps and integration of advanced on-chip features
2020
Atomic ions trapped in electromagnetic potentials have long been used for fundamental studies in quantum physics. Over the past two decades, trapped ions have been successfully used to implement technologies such as quantum computing, quantum simulation, atomic clocks, mass spectrometers and quantum sensors. Advanced fabrication techniques, taken from other established or emerging disciplines, are used to create new, reliable ion-trap devices aimed at large-scale integration and compatibility with commercial fabrication. This Technical Review covers the fundamentals of ion trapping before discussing the design of ion traps for the aforementioned applications. We overview the current microfabrication techniques and the various considerations behind the choice of materials and processes. Finally, we discuss current efforts to include advanced, on-chip features in next-generation ion traps. Ion traps enable the precise control and manipulation of the quantum state of a trapped ion. This Technical Review discusses the way in which ion-trap microchips can be fabricated and integrated with advanced on-chip features for implementing practical quantum technologies.
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