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
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
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