QSense OIST Mini-Symposium Talk 8: "Spin Maser for Quantum Information Technologies"


2021年2月17日 (水) 17:00


Zoom (link is distributed to registered participants)


Speaker: Dr Yuimaru Kubo, Okinawa Institute of Science and Technology (OIST) Graduate University

Spin Maser for Quantum Information Technologies
(QSense OIST Mini Symposium Talk 8)​

Using an ensemble of nitrogen (P1) centers in diamond placed inside a 3D loop-gap resonator, we observe population inversion of a satellite P1 transition when a microwave pump tone is applied to the central P1 transition. This inversion is manifested by the amplification of the probe tone applied to the satellite transition. A mechanism for generating this inversion is proposed, involving higher-order cross relaxations within the P1 centers [1] and spin flip-flops with other defect centers that are also present in the diamond sample. We demonstrate that this “maser amplifier” is very interesting and promising for microwave quantum information and technology applications at millikelvin temperatures.

[1] P. P. Sorokin, G. J. Geller, and I. L. Gelles. Phys. Rev. 118(4), 939-945 (1960).

OIST Mini-Symposium for Quantum Sensors of Magnetic and Inertial Forces

This mini-symposium is hosted by the Quantum Machines Unit in the Okinawa Institute of Science and Technology Graduate University, and will take place from Feb 1, 2021 - March 5, 2021. To get the precise schedule and zoom invitation please register below. Attendance is open to any student/faculty member from any of the institutions associated with the speakers.


Quantum systems are extremely fragile, sensitive to noise and fluctuations by their environments. This, in turn, makes them excellent sensors for a variety of forces and fields. In this mini-symposium we focus on the development of novel quantum sensors which are aimed at the precision sensing of inertial forces such as acceleration or gravity, and magnetic forces.

Such sensors - accelerometers/gravimeters or magnetometers, have a widespread application in industry such as sensing underground water movements using gravimeters, through to magnetic brain imaging using magnetoencephelography. Each week we hear from three international experts on these topics in hour-long seminars and discussions.

For more information, visit the QSense website.

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Sponsor or Contact: 
Quantum Machines Unit (Jason Twamley)
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