【Open for Registration】The 10th Quantum Solid Flagship Seminar
Date/Time:
Tuesday, April 8, 2025,
1:30 PM – 2:30 PM (JST)
Venue
・On-site: Tokyo University of Science, EEI Building, 2nd Floor, Room 211 (Ookayama Campus)
https://www.qms.e.titech.ac.jp/wp-content/themes/theme_QMS/assets/pdf/map_E.pdf
・Online (Zoom): The connection details will be provided to registered participants.
Chair
Prof. Takayuki Iwasaki (Science Tokyo)
Lecturer
Prof. William John Munro (OIST)
William John MUNRO received his D. Phil degree in Physics from the University of Waikato, NZ in 1995 and then moved to an ARC research fellowship at the University of Queensland in Australia from 1997-2000. He moved to industry in 2000, first as a staff scientist at Hewlett Packard Laboratories in Bristol from 2000-2010 and then as a Senior Distinguished Scientist & Director of its Research Center for Theoretical Quantum Physics in NTT Basic Research Laboratories until 2023. He recently joined the Okinawa Institute of Science and Technology where his leads the Quantum Engineering and Design unit. His research in Quantum Science ranges from foundational issues of quantum theory through to applications of quantum technology and their practical realization. Further Bill is also a fellow of the APS, OSA and IOP.
https://www.oist.jp/research/research-units/qed/bill-munro
Title
Superradiant Masing in an electron spin ensemble of NV- centers.
Abstract
Superradiance is a fundamental collective effect where radiation is amplified by the coherence of multiple emitters. It plays a prominent role in optics and quantum mechanics. Resonators coupled to spin ensembles are promising future building blocks of integrated quantum devices that will involve superradiance. As such, it is important to study its fundamental properties within such devices. Here we explore superradiance in a system composed of a three-dimensional lumped element resonator in the fast cavity limit inductively coupled to an inhomogeneously broadened ensemble of nitrogen–vacancy centres. We observe a superradiant pulse being emitted a trillion times faster than the decay for an individual nitrogen–vacancy centre. Further we uncover a new role for spin-spin interactions in driving the superradiant dynamics of a hybrid system of nitrogen-vacancy center spins in diamond coupled to a superconducting microwave cavity. After an initial fast superradiant decay, we observe unexpected transient pulsed and then quasi-continuous masing for up to 1 millisecond. Our findings provide new pathways for exploring complex spin-spin interactions in dense disordered systems and open exciting possibilities for solid-state superradiant masers, where these interactions could facilitate direct microwave pumping for ultra-narrow linewidth frequency generation.
Registration fee
Free
Participants
General Public & Students
Capacity
・On-site (Science Tokyo): 30 participants
・Online(Zoom): 300 participants
*Once the on-site capacity is reached, further participants will be guided to attend via Zoom.
Language
English
Registration
Please register for participation using the URL below.
https://forms.gle/eJfN59i2yAAQVUA99
Contact
HQ, Quantum Metrology and Sensing
Email: hq[at]qleap.titech.ac.jp
*Note: Please replace [at] with @ when you send an email to us.