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26 papers
Focusing Surface-Acoustic-Wave Resonators on Thin-Film Lithium Niobate with Transverse-Mode Suppression
Ryo Sasaki, Ryusuke Hisatomi, Rekishu Yamazaki +3
Surface-acoustic-wave (SAW) resonators are a promising platform for constructing hybrid quantum systems, where confined acoustic waves enable strong interaction with various physic…
Spontaneous Brillouin Scattering in a Few-Mode Optical Fiber
Hikari Kikuchi, Rekishu Yamazaki
We report a comprehensive experimental study of spontaneous Brillouin scattering in a few-mode optical fiber, resolving both forward and backward scattering processes for intra- an…
Superconducting Acousto-optic Phase Modulator
Ayato Okada, Rekishu Yamazaki, Maria Fuwa +9
We report the development of a superconducting acousto-optic phase modulator fabricated on a lithium niobate substrate. A titanium-diffused optical waveguide is placed in a surface…
Radio-Frequency-to-Optical Conversion using Acoustic and Optical Whispering Gallery Modes
Rekishu Yamazaki, Ayato Okada, Atsushi Noguchi +7
Whispering gallery modes (WGMs), circulating modes near the surface of a spheroidal material, have been known to exhibit high quality factors for both acoustic and electromagnetic…
Helicity-Changing Brillouin Light Scattering by Magnons in a Ferromagnetic Crystal
R. Hisatomi, A. Noguchi, R. Yamazaki +4
Brillouin light scattering in ferromagnetic materials usually involves one magnon and two photons and their total angular momentum is conserved. Here, we experimentally demonstrate…
Single-photon quantum regime of artificial radiation pressure on a surface acoustic wave resonator
Atsushi Noguchi, Rekishu Yamazaki, Yutaka Tabuchi +1
Electromagnetic fields carry momentum, which upon reflection on matter gives rise to the radiation pressure of photons. The radiation pressure has recently been utilized in cavity…
Brillouin light scattering by magnetic quasi-vortices in cavity optomagnonics
A. Osada, A. Gloppe, R. Hisatomi +5
A ferromagnetic sphere can support \textit{optical vortices} in forms of whispering gallery modes and \textit{magnetic quasi-vortices} in forms of magnetostatic modes with non-triv…
Qubit-assisted transduction for a detection of surface acoustic waves near the quantum limit
Atsushi Noguchi, Rekishu Yamazaki, Yutaka Tabuchi +1
We demonstrate ultra-sensitive measurement of fluctuations in a surface-acoustic-wave~(SAW) resonator using a hybrid quantum system consisting of the SAW resonator, a microwave (MW…
Information-to-work conversion by Maxwell's demon in a superconducting circuit-QED system
Y. Masuyama, K. Funo, Y. Murashita +6
The gedanken experiment of Maxwell's demon has led to the studies concerning the foundations of thermodynamics and statistical mechanics. The demon measures fluctuations of a syste…
Electro-mechano-optical detection of nuclear magnetic resonance
Kazuyuki Takeda, Kentaro Nagasaka, Atsushi Noguchi +5
Signal reception of nuclear magnetic resonance (NMR) usually relies on electrical amplification of the electromotive force caused by nuclear induction. Here, we report up-conversio…
Cavity optomechanics with surface acoustic waves
Ayato Okada, Fumikazu Oguro, Atsushi Noguchi +4
We report a development of an electro-optomechanical system based on a surface acoustic wave (SAW), where a piezoelectric material with a large optoelastic susceptibility is used f…
Nonclassical photon number distribution in a superconducting cavity under a squeezed drive
S. Kono, Y. Masuyama, T. Ishikawa +5
A superconducting qubit in the strong dispersive regime of a circuit quantum electrodynamics system is a powerful probe for microwave photons in a cavity mode. In this regime, a qu…
Resolving magnon number states in quantum magnonics
Dany Lachance-Quirion, Yutaka Tabuchi, Seiichiro Ishino +4
Collective excitation modes in solid state systems play a central role in circuit quantum electrodynamics, cavity optomechanics, and quantum magnonics. In the latter, quanta of col…
Strong coupling in multimode quantum electromechanics
Atsushi Noguchi, Rekishu Yamazaki, Manabu Ataka +5
Cavity electro-(opto-)mechanics allows us to access not only single isolated but also multiple mechanical modes in a massive object. Here we develop a multi-mode electromechanical…
Bidirectional conversion between microwave and light via ferromagnetic magnons
Ryusuke Hisatomi, Alto Osada, Yutaka Tabuchi +5
Coherent conversion of microwave and optical photons in the single-quantum level can significantly expand our ability to process signals in various fields. Efficient up-conversion…
Cavity optomagnonics with spin-orbit coupled photons
A. Osada, R. Hisatomi, A. Noguchi +7
We experimentally implement a system of cavity optomagnonics, where a sphere of ferromagnetic material supports whispering gallery modes (WGMs) for photons and the magnetostatic mo…
Quantum magnonics: magnon meets superconducting qubit
Yutaka Tabuchi, Seiichiro Ishino, Atsushi Noguchi +4
The techniques of microwave quantum optics are applied to collective spin excitations in a macroscopic sphere of ferromagnetic insulator. We demonstrate, in the single-magnon limit…
Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
Yutaka Tabuchi, Seiichiro Ishino, Toyofumi Ishikawa +3
We demonstrate large normal-mode splitting between a magnetostatic mode (the Kittel mode) in a ferromagnetic sphere of yttrium iron garnet and a microwave cavity mode. Strong coupl…
Observation of a p-wave Optical Feshbach Resonance
Rekishu Yamazaki, Shintaro Taie, Seiji Sugawa +2
We demonstrate a p$-wave optical Feshbach resonance (OFR) using purely long-range molecular states of a fermionic isotope of ytterbium ^{171}Yb, following the proposition made by K…
An SU(N) Mott insulator of an atomic Fermi gas realized by large-spin Pomeranchuk cooling
Shintaro Taie, Rekishu Yamazaki, Seiji Sugawa +1
The Hubbard model, containing only the minimum ingredients of nearest neighbor hopping and on-site interaction for correlated electrons, has succeeded in accounting for diverse phe…
Bose-Einstein condensate in gases of rare atomic species
Seiji Sugawa, Rekishu Yamazaki, Shintaro Taie +1
We report on the successful extension of production of Bose-Einstein Condensate (BEC) to rare species. Despite its low natural abundance of 0.13%, Yb is directly evaporativ…
Interaction and filling induced quantum phases of dual Mott insulators of bosons and fermions
Seiji Sugawa, Kensuke Inaba, Shintaro Taie +3
Many-body effects are at the very heart of diverse phenomena found in condensed-matter physics. One striking example is the Mott insulator phase where conductivity is suppressed as…
Realization of SU(2)*SU(6) Fermi System
Shintaro Taie, Yosuke Takasu, Seiji Sugawa +4
We report the realization of a novel degenerate Fermi mixture with an SU(2)*SU(6) symmetry in a cold atomic gas. We successfully cool the mixture of the two fermionic isotopes of y…
Nanometer-scale spatial modulation of an inter-atomic interaction in a Bose-Einstein condensate
Rekishu Yamazaki, Shintaro Taie, Seiji Sugawa +1
We demonstrate nanometer-scale spatial control of inter-atomic interactions in a Bose-Einstein condensate of ytterbium(Yb). A pulsed optical standing wave, tuned near an optical Fe…