RQC Seminar

179th RQC Seminar

• Speaker

  Prof. Gabriel Aeppli
  ( ETH Zurich, the Department of Physics, Switzerland )

• Date

  16:00-17:00 (4:00 p.m. -5:00 p.m.), January 17, 2025 (Friday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room/ 研究本館3階 セミナー室(345-347) C01）

• Title

  Viable qubits in noisy and strongly interacting systems

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
Quantum sensors and qubits are usually two-level systems, quantum analogs of classical bits assuming binary values ‘0' or ‘1'. They are useful to the extent to which superpositions of ‘0’ and ‘1’ persist despite a noisy environment. The standard prescription to avoid decoherence of solid-state qubits is their isolation via extreme dilution in ultrapure materials. We demonstrate a different strategy using a rare-earth insulator which realizes a dense random network of interacting two-level systems. Qubits with ultralong decoherence times emerge within this network because of rather than in spite of the interactions. The results are placed in the context of an architecture for solid state rare-earth based quantum processors, for which preliminary experiments are also presented.