Alexander O. Sushkov
Boston University
Particle physicsAxionMagnetic fieldOpticsPhysicsMagnetometerDark matterDipoleField (physics)Materials scienceElectric dipole momentCondensed matter physicsDiamondSpinsMagnetizationNuclear magnetic resonanceSpin (physics)Quantum mechanicsPrecessionSpin-½Quantum
Publications 115
#1Andrea VinanteH-Index: 23
#2Chris TimberlakeH-Index: 5
Last. Hendrik UlbrichtH-Index: 33
view all 6 authors...
We discuss the fundamental noise limitations of a ferromagnetic torque sensor based on a levitated magnet in the tipping regime. We evaluate the optimal magnetic field resolution taking into account the thermomechanical noise and the mechanical detection noise at the standard quantum limit (SQL). We find that the Energy Resolution Limit (ERL), pointed out in recent literature as a relevant benchmark for most classes of magnetometers, can be surpassed by many orders of magnitude. Moreover, simila...
We derive spectral lineshapes of the expected signal for a haloscope experiment searching for axionlike dark matter. The knowledge of these lineshapes is needed to optimize the experimental design and data analysis procedure. We extend the previously known results for the axion-photon and axion-gluon couplings to the case of gradient (axion-fermion) coupling. A unique feature of the gradient interaction is its dependence not only on magnitudes but also on directions of velocities of galactic hal...
#1Deniz AybasH-Index: 7
#2Hendrik BekkerH-Index: 1
Last. Alexander O. SushkovH-Index: 29
view all 10 authors...
Nuclear magnetic resonance is a promising experimental approach to search for ultra-light axion-like dark matter. Searches such as the cosmic axion spin-precession experiments (CASPEr) are ultimately limited by quantum-mechanical noise sources, in particular, spin-projection noise. We discuss how such fundamental limits can potentially be reached. We consider a circuit model of a magnetic resonance experiment and quantify three noise sources: spin-projection noise, thermal noise, and amplifier n...
#1Deniz Aybas (BU: Boston University)H-Index: 7
#2Janos Adam (BU: Boston University)H-Index: 3
Last. Alexander O. Sushkov (BU: Boston University)H-Index: 29
view all 25 authors...
We report the results of an experimental search for ultralight axionlike dark matter in the mass range 162-166 neV. The detection scheme of our Cosmic Axion Spin Precession Experiment is based on a precision measurement of ^{207}Pb solid-state nuclear magnetic resonance in a polarized ferroelectric crystal. Axionlike dark matter can exert an oscillating torque on ^{207}Pb nuclear spins via the electric dipole moment coupling g_{d} or via the gradient coupling g_{aNN}. We calibrate the detector a...
#1Alexander O. Sushkov (BU: Boston University)H-Index: 29
#1Pavel Fadeev (University of Mainz)H-Index: 4
#2Tao WangH-Index: 10
Last. Derek F. Jackson Kimball (CSUEB: California State University, East Bay)H-Index: 25
view all 7 authors...
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. The behavior of intrinsic spin in spacetime dragged and warped by a massive rotating body is an experimentally open question, hence the results of such a measurement could have important theoretical consequences. Such a measurement is possible by using mm-scale ferromagnetic gyroscopes in orbit around...
A subset of QuantISED Sensor PIs met virtually on May 26, 2020 to discuss a response to a charge by the DOE Office of High Energy Physics. In this document, we summarize the QuantISED sensor community discussion, including a consideration of HEP science enabled by quantum sensors, describing the distinction between Quantum 1.0 and Quantum 2.0, and discussing synergies/complementarity with the new DOE NQI centers and with research supported by other SC offices. Quantum 2.0 advances in sensor tech...
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