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Center for Astrophysics Research and Technologies Seminar Series Information

 

Events Calendar

Enhanced-Range Entanglement of Spin Qubits

Thursday April 25, 2019
3:30 pm


 Presenter:  Vanita Srinivasa, Sandia National Laboratories
 Series:  CQuIC Seminars
 Abstract:  Many proposed realizations of quantum information processing rely on rapid and robust entanglement of coherent qubits over a wide range of distances. Implementations based on spins in solids can take advantage of both the relative isolation of spin qubits from their environment and rapid control of electronic charge degrees of freedom. However, entangling mechanisms in these systems are often limited in range and remain susceptible to charge-based decoherence. I will describe approaches to addressing these challenges for semiconductor spin qubits within systems of coupled quantum dots as well as hybrid systems in which dots are coupled to atomic impurities. Methods for enhancing the range of entangling interactions in these systems that I will discuss include the use of quantum dots as mediators, the Coulomb interaction, and coupling to microwave photons in a superconducting resonator. Within silicon-based implementations, these methods lead to entangling gates with high theoretical fidelities in the presence of charge noise and relaxation. I will also describe approaches for robust long-range entanglement between spin qubits via microwave photons inspired by techniques from circuit quantum electrodynamics, nuclear magnetic resonance, and the Cirac-Zoller gate for trapped ions.
 Host:  Sayonee Ray
 Location:  Room 190, Physics & Astronomy

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