Observing black holes spin
Sign Up to like & getrecommendations! Published in 2019 at "Nature Astronomy"
DOI: 10.1038/s41550-018-0665-z
Abstract: The spin of a black hole retains the memory of how the black hole grew, and can be a potent source of energy for powering relativistic jets. To understand the diagnostic power and astrophysical significance… read more here.
Keywords: black holes; astronomy; black hole; hole ... See more keywords
A singlet-triplet hole spin qubit in planar Ge
Sign Up to like & getrecommendations! Published in 2021 at "Nature Materials"
DOI: 10.1038/s41563-021-01022-2
Abstract: Spin qubits are considered to be among the most promising candidates for building a quantum processor. Group IV hole spin qubits are particularly interesting owing to their ease of operation and compatibility with Si technology.… read more here.
Keywords: spin; spin qubit; hole spin; singlet triplet ... See more keywords
Thin accretion disk around a Kerr black hole immersed in swirling universes
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/08/094
Abstract: We have studied the properties of thin accretion disks around swirling-Kerr black holes, which own an extra swirling parameter describing the rotation of the immersed universe. Our results show that the swirling parameter leaves distinct… read more here.
Keywords: disk; hole spin; black hole; hole ... See more keywords
The relation between black hole spin and molecular gas in massive galaxies
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae2256
Abstract: Molecular gas is the key probe for the complex interaction between the accretion of black holes and star formation of the host galaxy of active galactic nuclei (AGN). The molecular gas discovered around the AGN… read more here.
Keywords: hole spin; black hole; molecular gas; gas ... See more keywords
Optical pumping and initialization of a hole spin in site-controlled InGaAs pyramidal quantum dots
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/fps4-vb8c
Abstract: We characterize site-controlled In0.25Ga0.75As quantum dots in (111)B GaAs pyramidal recesses as a platform for spin qubit implementation. By combining scanning confocal cryomicroscopy, magnetophotoluminescence studies, and resonant excitation, we identify and isolate a positively charged… read more here.
Keywords: hole spin; site controlled; spin; quantum dots ... See more keywords
Theory of hole-spin qubits in strained germanium quantum dots
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.103.125201
Abstract: We theoretically investigate the properties of holes in a Si$_{x}$Ge$_{1-x}$/Ge/ Si$_{x}$Ge$_{1-x}$ quantum well in a perpendicular magnetic field that make them advantageous as qubits, including a large ($>$100~meV) intrinsic splitting between the light and heavy… read more here.
Keywords: hole spin; quantum dots; theory hole; spin ... See more keywords
Heavy-hole spin relaxation in quantum dots: Isotropic versus anisotropic effects
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.110.045422
Abstract: Non-charge based logic in single-hole spin of semiconductor quantum dots (QDs) can be controlled by anisotropic gate potentials providing a notion for making next generation solid-state quantum devices. In this study, we investigate the isotropic… read more here.
Keywords: hole spin; spin; heavy hole; spin relaxation ... See more keywords
Precise simulation of single-hole spin control in quantum dots
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.245426
Abstract: The precise simulation of the preparation, control, and readout of a single-hole spin is investigated via hierarchical equations of motion(HEOM) approach. By ionization of a resonantly excited electron-hole pair and tunneling the conduction level electrons… read more here.
Keywords: control; hole; single hole; hole spin ... See more keywords
Spin-Mechanical Coupling of an InAs Quantum Dot Embedded in a Mechanical Resonator.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.246801
Abstract: We demonstrate strain-induced coupling between a hole spin in a quantum dot and mechanical motion of a cantilever. The optical transitions of quantum dots integrated into GaAs mechanical resonators are measured synchronously with the motion… read more here.
Keywords: coupling inas; quantum dot; mechanical coupling; spin ... See more keywords
Charge-Noise-Induced Dephasing in Silicon Hole-Spin Qubits.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.247701
Abstract: We investigate, theoretically, charge-noise-induced spin dephasing of a hole confined in a quasi-two-dimensional silicon quantum dot. Central to our treatment is accounting for higher-order corrections to the Luttinger Hamiltonian. Using experimentally reported parameters, we find… read more here.
Keywords: charge noise; noise induced; hole spin; induced dephasing ... See more keywords
Oscillating x-rays reveal black hole spin
Sign Up to like & getrecommendations! Published in 2019 at "Science"
DOI: 10.1126/science.363.6426.494-n
Abstract: Black Hole Physics When a star passes close to a massive black hole (MBH), it is ripped apart by the strong tidal forces. As the resulting debris falls toward the MBH, it heats up, emitting… read more here.
Keywords: rays reveal; black hole; hole; reveal black ... See more keywords