Maxim Goryachev
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View article: Dynamically tuneable helicity in twisted electromagnetic resonators
Dynamically tuneable helicity in twisted electromagnetic resonators Open
We report the generation of helical electromagnetic radiation in a microwave cavity resonator, achieved by introducing mirror asymmetry, i.e., chirality, through a controlled geometric twist of the conducting boundary conditions. The emerg…
View article: Search for Axion Dark Matter from 1.1 to 1.3 GHz with ADMX
Search for Axion Dark Matter from 1.1 to 1.3 GHz with ADMX Open
Axion dark matter can satisfy the conditions needed to account for all of the dark matter and solve the strong C P problem. The Axion Dark Matter eXperiment (ADMX) is a direct dark matter search using a haloscope to convert axions to p…
View article: Cryogenic microwave whispering gallery mode spectroscopy of paramagnetic impurities in high-purity crystalline LiF
Cryogenic microwave whispering gallery mode spectroscopy of paramagnetic impurities in high-purity crystalline LiF Open
A low-noise cryogenic microwave spectroscopy experiment was performed on a high-purity lithium fluoride (LiF) crystal. The spectroscopy data revealed avoided level-crossing interactions in whispering gallery modes, indicative of electron s…
View article: Observation of a phase transition in KTaO$_3$ induced by residual niobium impurities
Observation of a phase transition in KTaO$_3$ induced by residual niobium impurities Open
We report the observation of a phase transition in a KTaO$_3$ crystal, corresponding to a paraelectric-to-ferroelectric transition. The crystal was placed inside a copper cavity to form a dielectric-loaded microwave cavity, and the transit…
View article: Electromagnetic helicity in twisted cavity resonators
Electromagnetic helicity in twisted cavity resonators Open
Through left- or right-handed twisting, we investigate the impact of mirror-asymmetry (chirality) of the conducting boundary conditions of an equilaterial triangular cross section electromagnetic resonator.We observe the generation of eige…
View article: High frequency gravitational wave plotter: Stochastic signals
High frequency gravitational wave plotter: Stochastic signals Open
HFGWplotter_Omega: Gravitational Waves Plotter for stochastic signals and power-law-integrated sensitivities Created by Francesco Muia, Andreas Ringwald and Carlos Tamarit. Code maintained by Carlos Tamarit Credit for the data of the plots…
View article: Experimental Limits on Planetary Mass Primordial Black Hole Mergers
Experimental Limits on Planetary Mass Primordial Black Hole Mergers Open
The multi-mode acoustic gravitational wave experiment (MAGE) is a high-frequency gravitational wave detection experiment featuring cryogenic quartz bulk acoustic wave resonators operating as sensitive strain antennas in the MHz regime. Aft…
View article: Cryogenic Microwave Whispering Gallery Mode Spectroscopy of Paramagnetic Impurities in High-Purity Crystalline LiF
Cryogenic Microwave Whispering Gallery Mode Spectroscopy of Paramagnetic Impurities in High-Purity Crystalline LiF Open
A low-noise cryogenic microwave spectroscopy experiment was performed on a high-purity lithium fluoride (LiF) crystal. The spectroscopy data revealed avoided level crossing interactions in whispering gallery modes, indicative of electron s…
View article: Improved receiver noise calibration for ADMX axion search: 4.54 to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>5.41</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>μeV</mml:mi></mml:mrow></mml:math>
Improved receiver noise calibration for ADMX axion search: 4.54 to Open
Axions are a well-motivated candidate for dark matter. The preeminent method to search for axion dark matter is known as the axion haloscope, which makes use of the conversion of axions to photons in a large magnetic field. Because of the …
View article: Ultraviolet Light-Induced Microwave Mode Tuning in a Rutile TiO$_2$ Whispering Gallery Resonator
Ultraviolet Light-Induced Microwave Mode Tuning in a Rutile TiO$_2$ Whispering Gallery Resonator Open
We report the observation of transient nonlinear optical effects in a macroscopic whispering gallery mode resonator made of rutile TiO$_2$, demonstrating strong optical-microwave transduction under laser irradiation. By comparing the effec…
View article: Improved Receiver Noise Calibration for ADMX Axion Search: 4.54 to 5.41 $μ$eV
Improved Receiver Noise Calibration for ADMX Axion Search: 4.54 to 5.41 $μ$eV Open
Axions are a well-motivated candidate for dark matter. The preeminent method to search for axion dark matter is known as the axion haloscope, which makes use of the conversion of axions to photons in a large magnetic field. Due to the weak…
View article: Upconversion of phonon modes into microwave photons in a lithium niobate bulk acoustic wave resonator coupled to a microwave cavity
Upconversion of phonon modes into microwave photons in a lithium niobate bulk acoustic wave resonator coupled to a microwave cavity Open
The coupling between acoustic vibrations in a lithium niobate bulk acoustic wave resonator and microwave photons of a re-entrant microwave cavity was investigated at a temperature close to 4 K. Coupling was achieved by placing the acoustic…
View article: Upconversion of Phonon Modes into Microwave Photons in a Lithium Niobate Bulk Acoustic Wave Resonator Coupled to a Microwave Cavity
Upconversion of Phonon Modes into Microwave Photons in a Lithium Niobate Bulk Acoustic Wave Resonator Coupled to a Microwave Cavity Open
The coupling between acoustic vibrations in a lithium niobate bulk acoustic wave resonator and microwave photons of a re-entrant microwave cavity was investigated at a temperature close to 4 K. Coupling was achieved by placing the acoustic…
View article: Precision multi-mode microwave spectroscopy of paramagnetic and rare-earth ion spin defects in single crystal calcium tungstate
Precision multi-mode microwave spectroscopy of paramagnetic and rare-earth ion spin defects in single crystal calcium tungstate Open
We present experimental observations of dilute ion spin ensemble defects in a low-loss single crystal cylindrical sample of CaWO4 cooled to 30 mK in temperature. Crystal field perturbations were elucidated by constructing a dielectrically …
View article: Search for non-virialized axions with 3.3-4.2 $μ$eV mass at selected resolving powers
Search for non-virialized axions with 3.3-4.2 $μ$eV mass at selected resolving powers Open
The Axion Dark Matter eXperiment is sensitive to narrow axion flows, given axions compose a fraction of the dark matter with a non-negligible local density. Detecting these low-velocity dispersion flows requires a high spectral resolution …
View article: Sharp electromagnetically induced absorption via balanced interferometric excitation in a microwave resonator
Sharp electromagnetically induced absorption via balanced interferometric excitation in a microwave resonator Open
A cylindrical TM$_{0,1,0}$ mode microwave cavity resonator was excited using a balanced interferometric configuration that allowed manipulation of the electric field and potential within the resonator by adjusting the phase and amplitude o…
View article: Axion Dark Matter eXperiment around 3.3 μeV with Dine-Fischler-Srednicki-Zhitnitsky Discovery Ability
Axion Dark Matter eXperiment around 3.3 μeV with Dine-Fischler-Srednicki-Zhitnitsky Discovery Ability Open
We report the results of a QCD axion dark matter search with discovery ability for Dine Fischler Srednicki Zhitnitsky (DFSZ) axions using an axion haloscope. Sub-Kelvin noise temperatures are reached with an ultra low-noise Josephson param…
View article: Scalar gravitational Aharonov–Bohm effect: Generalization of the gravitational redshift
Scalar gravitational Aharonov–Bohm effect: Generalization of the gravitational redshift Open
The Aharonov–Bohm effect is a quantum mechanical phenomenon that demonstrates how potentials can have observable effects even when the classical fields associated with those potentials are absent. Initially proposed for electromagnetic int…
View article: Optomechanical dark matter instrument for direct detection
Optomechanical dark matter instrument for direct detection Open
We propose the Optomechanical Dark-matter Instrument (ODIN), based on a new method for the direct detection of low-mass dark matter. We consider dark matter interacting with superfluid helium in an optomechanical cavity. Using an effective…
View article: Microwave-cavity-mode optimization by background antiresonance tuning
Microwave-cavity-mode optimization by background antiresonance tuning Open
To derive the best oscillator phase noise when implementing a high-Q\nresonator, the spectral line-shape must have high contrast and symmetry.\nIdeally, this line-shape is Lorentzian, however, in a high mode density\nspectral region, low-Q…
View article: Near-quantum-limited axion dark matter search with the ORGAN experiment around 26 $μ$eV
Near-quantum-limited axion dark matter search with the ORGAN experiment around 26 $μ$eV Open
The latest result from the ORGAN experiment, an axion haloscope is presented. This iteration of the experiment operated at millikelvin temperatures using a flux-driven Josephson parametric amplifier for reduced noise, along with various ot…
View article: Low Temperature Properties of Low-Loss Macroscopic Lithium Niobate Bulk Acoustic Wave Resonators
Low Temperature Properties of Low-Loss Macroscopic Lithium Niobate Bulk Acoustic Wave Resonators Open
We investigate gram scale macroscopic bulk acoustic wave (BAW) resonators manufactured from plates of piezoelectric lithium niobate. The intrinsic competing loss mechanisms were studied at cryogenic temperature through precision measuremen…
View article: Conductivity Freeze-Out in Isotopically Pure Si-28 at milli-Kelvin Temperatures
Conductivity Freeze-Out in Isotopically Pure Si-28 at milli-Kelvin Temperatures Open
Silicon is a key semiconducting material for electrical devices and hybrid quantum systems where low temperatures and zero-spin isotopic purity can enhance quantum coherence. Electrical conductivity in Si is characterised by carrier freeze…
View article: Translational modelling of low and medium intensity transcranial magnetic stimulation from rodents to humans
Translational modelling of low and medium intensity transcranial magnetic stimulation from rodents to humans Open
Background Rodent models using subthreshold intensities of transcranial magnetic stimulation (TMS) have provided insight into the biological mechanisms of TMS but often differ from human studies in the intensity of the electric field (E-fi…
View article: Nonvirialized axion search sensitive to Doppler effects in the Milky Way halo
Nonvirialized axion search sensitive to Doppler effects in the Milky Way halo Open
The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki- Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise …
View article: Author Correction: The multi-mode acoustic gravitational wave experiment: MAGE
Author Correction: The multi-mode acoustic gravitational wave experiment: MAGE Open
The correct Equation 4 appears below.In addition, in the Sensitivity to HFGWs section, "Based on the discussions presented in Aggarwal et al 8 , and using the C 3,0,0 mode as an example, MAGE would be sensitive to a 0.004 M • black hole me…
View article: Low frequency, 100–600 MHz, searches with axion cavity haloscopes
Low frequency, 100–600 MHz, searches with axion cavity haloscopes Open
We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter experiment (ADMX) has already searched. Reentrant and di…
View article: Precision Multi-Mode Microwave Spectroscopy of Paramagnetic and Rare-Earth Ion Spin Defects in Single Crystal Calcium Tungstate
Precision Multi-Mode Microwave Spectroscopy of Paramagnetic and Rare-Earth Ion Spin Defects in Single Crystal Calcium Tungstate Open
We present experimental observations of dilute ion spin ensemble defects in a low-loss single crystal cylindrical sample of CaWO$_4$ cooled to $30$ mK in temperature. Crystal field perturbations were elucidated by constructing a dielectric…