Larmor precession ≈ Larmor precession
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Observation of a Time Quasicrystal and Its Transition to a Superfluid Time Crystal Open
We report experimental realization of a quantum time quasicrystal and its transformation to a quantum time crystal. We study Bose-Einstein condensation of magnons, associated with coherent spin precession, created in a flexible trap in sup…
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Temporal Order in Periodically Driven Spins in Star-Shaped Clusters Open
We experimentally study the response of star-shaped clusters of initially unentangled N=4, 10, and 37 nuclear spin-1/2 moments to an inexact π-pulse sequence and show that an Ising coupling between the center and the satellite spins result…
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Invited Review Article: Instrumentation for nuclear magnetic resonance in zero and ultralow magnetic field Open
We review experimental techniques in our laboratory for nuclear magnetic resonance (NMR) in zero and ultralow magnetic field (below 0.1 μT) where detection is based on a low-cost, non-cryogenic, spin-exchange relaxation free 87Rb atomic ma…
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Spin precession experiments for light axionic dark matter Open
Axionlike particles are promising candidates to make up the dark matter of the Universe, but it is challenging to design experiments that can detect them over their entire allowed mass range. Dark matter in general, and, in particular, axi…
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Time-optimized pulsed dynamic nuclear polarization Open
TOP-DNP is an innovative pulsed DNP method that efficiently enhances NMR signals with moderate microwave power at high fields.
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Distinguishing Kerr naked singularities and black holes using the spin precession of a test gyro in strong gravitational fields Open
We study here the precession of the spin of a test gyroscope attached to a\nstationary observer in the Kerr spacetime, specifically, to distinguish naked\nsingularity (NS) from black hole (BH). It was shown recently that for gyros\nattache…
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Spin exchange broadening of magnetic resonance lines in a high-sensitivity rotating K-Rb-21Ne co-magnetometer Open
Atomic co-magnetometers can be utilized for high-precision angular velocity sensing or fundamental physics tests. The sensitivity of a co-magnetometer determines the angle random walk of an angular velocity sensor and the detection limit f…
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Electrical manipulation of semiconductor spin qubits within the -matrix formalism Open
We discuss the modeling of the electrical manipulation of spin qubits in the linear-response regime where the Rabi frequency is proportional to the magnetic field and to the radio-frequency electric field excitation. We show that the Rabi …
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One- and Two-Dimensional Nuclear Magnetic Resonance Spectroscopy with a Diamond Quantum Sensor Open
We report on Fourier spectroscopy experiments performed with near-surface nitrogen-vacancy centers in a diamond chip. By detecting the free precession of nuclear spins rather than applying a multipulse quantum sensing protocol, we are able…
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Quantum Spin Stabilized Magnetic Levitation Open
We theoretically show that, despite Earnshaw's theorem, a nonrotating single magnetic domain nanoparticle can be stably levitated in an external static magnetic field. The stabilization relies on the quantum spin origin of magnetization, n…
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Pulsed operation of a miniature scalar optically pumped magnetometer Open
A scalar magnetic field sensor based on a millimeter-size 87Rb vapor cell is described. The magnetometer uses nearly copropagating pump and probe laser beams, amplitude modulation of the pump beam, and detection through monitoring the pola…
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The ALPHATRAP experiment Open
\nThe ALPHATRAP experiment at the Max-Planck Institute for Nuclear Physics in Heidelberg aims at probing the validity of quantum electrodynamics in extremely strong electromagnetic fields. To this end, ALPHATRAP will determine the value of…
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Off-resonance NOVEL Open
Dynamic nuclear polarization (DNP) is theoretically able to enhance the signal in nuclear magnetic resonance (NMR) experiments by a factor γe/γn, where γ’s are the gyromagnetic ratios of an electron and a nuclear spin. However, DNP enhance…
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Subterahertz ferrimagnetic spin-transfer torque oscillator Open
A theory of magnetization dynamics in ferrimagnetic materials with antiparallel aligned spin sub-lattices under action of spin-transfer torques (STT) is developed. We consider magnetization dynamics in GdFeCo layers in two cases of magneti…
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Spin precession in anisotropic media Open
We generalize the diffusive model for spin injection and detection in nonlocal spin structures to account for spin precession under an applied magnetic field in an anisotropic medium, for which the spin lifetime is not unique and depends o…
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Kerker Effect in Ultrahigh-Field Magnetic Resonance Imaging Open
Ultrahigh-field (UHF) magnetic resonance imaging (MRI) systems are getting a lot of attention as they ensure high intrinsic signal-to-noise ratio resulting in higher spatial and temporal resolutions as well as better contrast. This promise…
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Nutation Spectroscopy of a Nanomagnet Driven into Deeply Nonlinear Ferromagnetic Resonance Open
Strongly out-of-equilibrium regimes in magnetic nanostructures exhibit novel properties, linked to the nonlinear nature of magnetization dynamics, which are of great fundamental and practical interest. Here, we demonstrate that ferromagnet…
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Gyroscopes orbiting black holes: A frequency-domain approach to precession and spin-curvature coupling for spinning bodies on generic Kerr orbits Open
A small body orbiting a black hole follows a trajectory that, at leading\norder, is a geodesic of the black hole spacetime. Much effort has gone into\ncomputing "self force" corrections to this motion, arising from the small\nbody's own co…
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Nutation in antiferromagnetic resonance Open
The effect of inertial spin dynamics is compared between ferromagnetic,\nantiferromagnetic and ferrimagnetic systems. The linear response to an\noscillating external magnetic field is calculated within the framework of the\ninertial Landau…
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Negative-Mass Instability of the Spin and Motion of an Atomic Gas Driven by Optical Cavity Backaction Open
We realize a spin-orbit interaction between the collective spin precession and center-of-mass motion of a trapped ultracold atomic gas, mediated by spin- and position-dependent dispersive coupling to a driven optical cavity. The collective…
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Spin precession in a black hole and naked singularity spacetimes Open
We propose here a specific criterion to address the existence or otherwise of\nKerr naked singularities, in terms of the precession of the spin of a test\ngyroscope due to the frame dragging by the central spinning body. We show that\nther…
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Current-Controlled Spin Precession of Quasistationary Electrons in a Cubic Spin-Orbit Field Open
Space- and time-resolved measurements of spin drift and diffusion are performed on a GaAs-hosted two-dimensional electron gas. For spins where forward drift is compensated by backward diffusion, we find a precession frequency in the absenc…
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Identifying when precession can be measured in gravitational waveforms Open
In binary-black-hole systems where the black-hole spins are misaligned with\nthe orbital angular momentum, precession effects leave characteristic\nmodulations in the emitted gravitational waveform. Here, we investigate where\nin the param…
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Recent Progress in Birdcage RF Coil Technology for MRI System Open
The radio frequency (RF) coil is one of the key components of the magnetic resonance imaging (MRI) system. It has a significant impact on the performance of the nuclear magnetic resonance (NMR) detection. Among numerous practical designs o…
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Overhauser Geomagnetic Sensor Based on the Dynamic Nuclear Polarization Effect for Magnetic Prospecting Open
Based on the dynamic nuclear polarization (DNP) effect, an alternative design of an Overhauser geomagnetic sensor is presented that enhances the proton polarization and increases the amplitude of the free induction decay (FID) signal. The …
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Anticrossing Spin Dynamics of Diamond Nitrogen-Vacancy Centers and All-Optical Low-Frequency Magnetometry Open
We investigate the photoinduced spin dynamics of single nitrogen-vacancy (N-V) centers in diamond near the electronic ground-state level anticrossing (GSLAC), which occurs at an axial magnetic field around 1024 G. Using optically detected …
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The influence of temperature dynamics and dynamic finite ion Larmor radius effects on seeded high amplitude plasma blobs Open
Thermal effects on the perpendicular convection of seeded pressure blobs in the scrape-off layer of magnetised fusion plasmas are investigated. Our numerical study is based on a four field full-F gyrofluid model, which entails the consiste…
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Gravity Probe Spin: Prospects for measuring general-relativistic precession of intrinsic spin using a ferromagnetic gyroscope Open
An experimental test at the intersection of quantum physics and general relativity is proposed: measurement of relativistic frame dragging and geodetic precession using intrinsic spin of electrons. Furthermore, the behavior of intrinsic sp…
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Magnetic-field uniformity in neutron electric-dipole-moment experiments Open
© 2019 American Physical Society. Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial mo…
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Three-Dimensional Nuclear Spin Positioning Using Coherent Radio-Frequency Control Open
Distance measurements via the dipolar interaction are fundamental to the application of nuclear magnetic resonance (NMR) to molecular structure determination, but they provide information on only the absolute distance r and polar angle θ b…