The ability to control spin systems in the large spin limit (i.e. classical magnets) and the single spin limit (i.e. spin qubits) have long been at the heart of numerous fundamental and technological advancements made in the fields of spintronics and quantum information science, respectively. More recently, it has been realized that new opportunities arise by combining the spin systems in the classical and quantum regime. In this talk, we will highlight these new capabilities specifically focusing on hybrids of spin qubits and wave-like excitations (magnons) of classical magnets. First, we will show how single- spin defects can act as novel quantum probes for advancing magnon-based spintronics. Reciprocally, by taking advantage of the progress made in spintronics for electrical control of magnets, we will then show how magnons can be used for coherently manipulating spin qubits for quantum-inspired applications.

Professor Pramey Upadhyaya is an Assistant Professor of Electrical and Computer Engineering at the Purdue University. Before joining Purdue, Pramey was a postdoctoral scholar in the Physics and Astronomy Department, University of California Los Angeles, working under the mentorship of Prof. Yaroslav Tserkovnyak. He earned his bachelor’s degree in Electrical Engineering from the Indian Institute of Technology Kharagpur, India, in 2009, and the master’s and Ph.D. degree in Electrical Engineering department from the University of California Los Angeles, USA, in 2011 and 2015, respectively. During his Ph.D., he was a resident theorist in the experimental group (Device Research Laboratory) led by Prof. Kang Wang. His research has explored the theory of classical and quantum spintronic phenomenon and their device applications, enabled by electrical and thermal control of magnetism. Along with his teammates, this work has resulted in one of the earliest demonstrations of current-induced room-temperature skyrmion manipulations, spin torque switching by topological surface states and NV-center probing of spin-caloritronics. These works have resulted in over 30 publications in journals including Science, Physical Review Letters, Nature Nanotechnology, Nature Materials and Nature Communications with an H-index of 24. He is a recipient of Director’s fellowship from the Los Alamos National Laboratory (2017), Qualcomm Innovation fellowship (2013) and Intel summer fellowship (2011).

Researchers should cite this work as follows:

• Pramey Upadhyaya (2020), "Spin Qubit & Magnon Hybrids: A New Platform for Quantum Spintronics," https://nanohub.org/resources/33711.

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