Engineering Quantum Processors and Quantum Networks Atom-by-Atom | Seminar Series w/ Hannes Bernien

Описание: Engineering Quantum Processors and Quantum Networks Atom-by-Atom

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Speaker: Hannes Bernien
Host: Zlatko Minev, PhD.

Abstract:
Reconfigurable arrays of neutral atoms are an exciting new platform to study quantum many-body phenomena and quantum information protocols. Their excellent coherence combined with programmable Rydberg interactions have led to intriguing observations such as quantum phase transitions, the discovery of quantum many-body scars, and the recent realization of a topological spin liquid phase.

Here, I will introduce new methods for controlling and measuring atom arrays that open up new directions in quantum state control, quantum feedback and many-body physics. First, I will introduce a dual species atomic array in which the second atomic species can be used to measure and control the primary species. This will lead to the possibility of performing quantum nondemolition measurements and new ways of engineering large, entangled states on these arrays. Furthermore, prospects of studying open systems with engineered environments will be discussed.

An alternative, hybrid approach for engineering interactions and scaling these quantum systems is the coupling of atoms to nanophotonic structures in which photons mediate interactions between atoms. Such a system can function as the building block of a large-scale quantum network. In this context, I will present quantum network node architectures that are capable of long-distance entanglement distribution at telecom wavelengths.

Bio:
Hannes Bernien Assistant Professor

The University of Chicago

Hannes Bernien’s work focuses on finding answers to questions such as how to fully scale controlled quantum systems from the current few-particle level to many particles, how to study the effects of increased complexity in these systems, and how to utilize these phenomena for quantum technology. His lab combines techniques from quantum control and quantum optics with ultracold atoms and nanotechnology in order to develop new ways of engineering large, complex quantum systems and studying the phenomena that arise in such systems.

Bernien earned his PhD (2014) in physics at Technical University Delft in the Netherlands in the group of Ronald Hanson. There, he performed experiments on quantum information processing with nitrogen vacancy centers in diamond and was the first to create long distance entanglement of solid state spins. This led to a loophole-free Bell test with two entangled spins that are 1.3 km apart. From 2015-2019, he was a postdoctoral research fellow in the group of Mikhail Lukin at Harvard where he co-developed a novel bottom-up approach to assemble large defect-free arrays of atoms with engineered interactions, This method has proven to be a promising platform for studying quantum many-body phenomena and realizing atomic qubit processors.

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The Qiskit Seminar Series is a deep dive into various academic and research topics within the quantum community. It will feature community members and leaders every Friday, 12 PM EDT.