Mechanisms generating correlated pairs of particles are at the core of diverse fields of physics such as Hawking radiation, phonon-mediated superconductivity or spontaneous parametric down-conversion. Similar approaches have been explored with ultracold atoms to correlate massive particles in various degrees of freedom. We use a Bose-Einstein condensate coupled to a high-finesse optical cavity to generate…
Author: Noah Tajwar
Trapped ions provide a promising platform for large scale quantum computing. A crucial element of this scalability will be the integration of laser light into the trapping chips themselves. In this talk, I will first provide a brief overview of trapped-ion systems and the path to scalability. The many benefits provided by integrated photonics will…
Photonic integrated circuits (PIC) can be exploited to control trapped ions more robustly than free-space optics. Most of the work done in this area used silicon nitride (Si3N4), however, it is incompatible with UV wavelengths. Instead, aluminium oxide (Al2O3) proves to be a suitable waveguide material. This project focuses on designing and optimizing several integrated…
Quantum physics has many applications today, many techniques have been developed and are now used in various fields. However, going back to the foundations, there are many interesting and still unresolved questions. This week, Nicolas Gisin will talk about the single photon, how to define it and how far it can travel if you want…
Current production FinFET and FDSOI CMOS technologies are suitable for large-scale, high-density quantum processor (QP) and readout control electronics. Due to layout manufacturability restrictions, that limit the types of qubit arrays and gates that can be implemented, the top gate pitch is too large for strong tunnel coupling between adjacent quantum dots (QDs), limiting the…
A major discovery by Hawking was that the interplay between general relativity and quantum theory leads to the prediction that black holes must radiate. In Hawking’s original calculation however, the black hole radiation was found to be of thermal character, thus leaving behind a mixed state describing the radiation as soon as the black hole…
While the principle of superposition in quantum physics is routinely validated for microscopic systems, it is still unclear why we do not observe macroscopic objects to be in superpositions of states that can be distinguished by some classical property. I will present our experiments, that harness the resonant Jaynes-Cummings interaction between a high overtone resonator…
One of the (many) challenges in scalable quantum computing with trapped ions is the transport of the ions. The transport of the ions needs to be done while avoiding the arch-enemy of ion-trappers: motional heating. In my talk we’ll discuss a recent paper by Sutherland et al. that explores a new protocol of ion transport,…
Machine-learning techniques that originated in several domains of “Artificial Intelligence”, are increasingly being applied to tackle problems in physical sciences. Applications range from experimental fields, where ML has been leveraged to more efficiently carry out measurements, inhibit noise or design structures, to computational and theoretical physics. In particular, a recent breakthrough showed that several numerical…
Scaling up trapped ion quantum information processors requires high fidelity control over many ions. One way of achieving such control is by using a trap with multiple zones, each zone holding few ions which can be manipulated with high fidelity. Operations between the ions are achieved by means of transporting the ions across zones. Although…