Tuesday Colloquium Reminder- Happening Today

Tue Feb 20 08:25:20 EST 2024

From: The Ohio State University Department of Physics <scopel.6 at osu.edu>
Sent: Tuesday, February 20, 2024 8:24 AM
To: Scopel, Carly <scopel.6 at osu.edu>
Subject: Tuesday Colloquium Reminder- Happening Today

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COLLEGE OF ARTS AND SCIENCES | DEPARTMENT OF PHYSICS

Happening Today-Spring 2024 Colloquium Series

Please join us at 10:00 AM AND at 3:45 PM for Colloquia with Dr. Kevin Singh from the University of Chicago and Dr. Shaowen Chen from Harvard University.

A dual-species Rydberg array

Abstract: Rydberg atom arrays are a leading platform for quantum information science. Such arrays comprise hundreds of long-lived qubits that are used for highly coherent analog quantum simulation and digital quantum computation. Advanced quantum protocols such as quantum error correction, however, require midcircuit qubit operations, including readout, reset, and replenishment of a subset of qubits. A compelling strategy to achieve these capabilities is a dual-species architecture in which a second atomic species can be controlled without crosstalk and entangled with the first via Rydberg interactions. In this talk, I will present our realization of a dual-species Rydberg array consisting of rubidium (Rb) and cesium (Cs) atoms. I will discuss the richness of interaction regimes that can be accessed in the system and how we achieve enhanced interspecies interactions by electrically tuning the Rydberg states close to a Forster resonance. In this regime, we demonstrate interspecies Rydberg blockade and use this blockade to generate Bell states between Rb and Cs hyperfine qubits. I will discuss how we combine this interspecies entanglement with native midcircuit readout to achieve quantum non-demolition measurement of a Rb qubit using an auxiliary Cs qubit. Finally, I will discuss how these techniques enable scalable measurement-based protocols and real-time feedback control in large-scale quantum systems.

Faculty Host: Dan Gauthier
Location: 4138 Physics Research Building
Time: 10:00 AM

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Visualizing Josephson Current with an Atomic Magnetometer

Abstract: Characterization and quantum control of complex quantum matter is one of the shared goals for condensed matter and quantum information science research. Toward this end, my research uses van der Waals materials to synthesize topological and correlated states, and quantum sensors based on spin defects to uncover their microscopic picture. Focusing on superconductivity as the theme of this talk, I will first present pathways to program the electron correlation in moiré graphene by exploiting the lattice degree of freedom, both in the planar and vertical directions. In the second part, I will show new experimental observables, unlocked by the nanoscale magnetometer based on nitrogen vacancy center in diamond, can uncover hidden physics. As an example, quantitative visualization of the super current flow in a SNS Josephson junction is used to reveal electrically configurable ground states in the zero-resistance regime. A surprising role of the kinetic inductance and the implications for the Josephson diode effect will be discussed. Finally, I will share my vision to integrate programmable quantum materials with nanoscale quantum sensors.

Faculty Host: Fengyuan Yang
Location: 1080 Physics Research Building
Time: 3:45 PM

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Join Us for the Colloquia and Receptions
Event details:

  *   Speakers: Dr. Kevin Singh, and Dr. Shaowen Chen
  *   Receptions start at 9:45 AM (outside 4138) and 3:30 PM (Atrium), Physics Research Building
  *   Colloquia from 10:00-11:00 AM and 3:45- 4:45 PM, 4138 and 1080 Physics Research Building
Refreshments will be provided at each reception.

[Photo of exterior of Smith Seminar Room, Physics 1080. (Location of Colloquium and Reception.)]

Find Out More: Dr. Singh's Colloquium<https://urldefense.com/v3/__https:/osu.us8.list-manage.com/track/click?u=c5c8b9e4c4ea0024e7b8c1d6a&id=fb81693c2c&e=8d1098595f__;!!KGKeukY!yfRu58xqNg2aAd3LNMmecbnz4derpIRwhFdWjsOvwFlE2TFId-5as1TDUbvRnXqsBJjRxapGS0xXjz6RyQ$>

Find Out More: Dr. Chen's Colloquium<https://urldefense.com/v3/__https:/osu.us8.list-manage.com/track/click?u=c5c8b9e4c4ea0024e7b8c1d6a&id=bd6d276dd8&e=8d1098595f__;!!KGKeukY!yfRu58xqNg2aAd3LNMmecbnz4derpIRwhFdWjsOvwFlE2TFId-5as1TDUbvRnXqsBJjRxapGS0wQ_7Bw-g$>
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Department of Physics
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