The old quadrupole down
November 6, 2026 at 7:14 PM
The old quadrupole down
New paper: "Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy", link: https://arxiv.org/abs/2611.04696
November 6, 2026 at 8:00 PM
New paper: "Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy", link: https://arxiv.org/abs/2611.04696
The quadrupole and octopole are not the only relevant directions. Their relationship to the CMB dipole and the ecliptic is also part of the anomaly.
November 8, 2026 at 12:49 AM
The quadrupole and octopole are not the only relevant directions. Their relationship to the CMB dipole and the ecliptic is also part of the anomaly.
Thulium atoms show ~4x smaller electric quadrupole polarizability than cesium, making them more resistant to stray electric fields. This advances development of ultra-precise thulium optical atomic clocks with improved accuracy in precision timekeeping.
#QuantumSensing #AtomicClocks #Research
#QuantumSensing #AtomicClocks #Research
Relativistic Calculation of Atomic Quadrupole Polarizability in Thulium for Precision Atomic Clocks
arxiv.org
November 6, 2026 at 7:52 AM
Thulium atoms show ~4x smaller electric quadrupole polarizability than cesium, making them more resistant to stray electric fields. This advances development of ultra-precise thulium optical atomic clocks with improved accuracy in precision timekeeping.
#QuantumSensing #AtomicClocks #Research
#QuantumSensing #AtomicClocks #Research
However, during vibration, their quadrupole moment changes, enabling a much weaker, quadrupole-allowed infrared spectrum.
2. Electric quadrupole transitions:
In atomic spectroscopy, transitions can occur via the electric quadrupole mechanism.
2. Electric quadrupole transitions:
In atomic spectroscopy, transitions can occur via the electric quadrupole mechanism.
November 2, 2026 at 6:21 PM
However, during vibration, their quadrupole moment changes, enabling a much weaker, quadrupole-allowed infrared spectrum.
2. Electric quadrupole transitions:
In atomic spectroscopy, transitions can occur via the electric quadrupole mechanism.
2. Electric quadrupole transitions:
In atomic spectroscopy, transitions can occur via the electric quadrupole mechanism.
Monopole: overall temperature.
Dipole: large-scale directional variation, dominated by our motion relative to the CMB.
Quadrupole: a two-lobed angular structure.
Octopole: a more complex eight-region angular structure.
Dipole: large-scale directional variation, dominated by our motion relative to the CMB.
Quadrupole: a two-lobed angular structure.
Octopole: a more complex eight-region angular structure.
November 8, 2026 at 12:56 AM
Monopole: overall temperature.
Dipole: large-scale directional variation, dominated by our motion relative to the CMB.
Quadrupole: a two-lobed angular structure.
Octopole: a more complex eight-region angular structure.
Dipole: large-scale directional variation, dominated by our motion relative to the CMB.
Quadrupole: a two-lobed angular structure.
Octopole: a more complex eight-region angular structure.
(IJMS) Ion-dynamic consequences of skew-symmetric geometry in a quadrupole mass filter: Publication date: Available online 6 November 2026
Source: International Journal of Mass Spectrometry
Author(s): Bhawana, Anushree Dutta, Pintu Mandal, Nabanita Deb #ijms #MassSpecRSS
Source: International Journal of Mass Spectrometry
Author(s): Bhawana, Anushree Dutta, Pintu Mandal, Nabanita Deb #ijms #MassSpecRSS
Ion-dynamic consequences of skew-symmetric geometry in a quadrupole mass filter
Publication date: Available online 6 November 2026
Source: International Journal of Mass Spectrometry
Author(s): Bhawana, Anushree Dutta, Pintu Mandal, Nabanita Deb
dlvr.it
November 8, 2026 at 12:01 AM
(IJMS) Ion-dynamic consequences of skew-symmetric geometry in a quadrupole mass filter: Publication date: Available online 6 November 2026
Source: International Journal of Mass Spectrometry
Author(s): Bhawana, Anushree Dutta, Pintu Mandal, Nabanita Deb #ijms #MassSpecRSS
Source: International Journal of Mass Spectrometry
Author(s): Bhawana, Anushree Dutta, Pintu Mandal, Nabanita Deb #ijms #MassSpecRSS
Sergey Tomin: Beam Transport Through a Quadrupole with Offsets in Both Transverse Planes https://arxiv.org/abs/2611.06730 https://arxiv.org/pdf/2611.06730 https://arxiv.org/html/2611.06730
November 5, 2026 at 6:55 AM
Sergey Tomin: Beam Transport Through a Quadrupole with Offsets in Both Transverse Planes https://arxiv.org/abs/2611.06730 https://arxiv.org/pdf/2611.06730 https://arxiv.org/html/2611.06730
New paper: "Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy", link: https://arxiv.org/abs/2611.04696
November 4, 2026 at 8:00 PM
New paper: "Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy", link: https://arxiv.org/abs/2611.04696
(J Chrom A) Detection of estrogens using 2-furoyl chloride derivatization coupled with ultra-high-performance liquid chromatography–quadrupole time-of-flight mass spectrometry: Publication date: Available online 5 November 2026
Source: Journal of Chromatography A
Author(s):… #JChrom #MassSpecRSS
Source: Journal of Chromatography A
Author(s):… #JChrom #MassSpecRSS
Detection of estrogens using 2-furoyl chloride derivatization coupled with ultra-high-performance liquid chromatography–quadrupole time-of-flight mass spectrometry
Publication date: Available online 5 November 2026
Source: Journal of Chromatography A
Author(s): Qingyu Ding, Tianyou Zhang, Peng Zhang, Weiye Chen, Jiayi Li, Guixin Dong, Guanhua Wang
dlvr.it
November 7, 2026 at 5:02 AM
(J Chrom A) Detection of estrogens using 2-furoyl chloride derivatization coupled with ultra-high-performance liquid chromatography–quadrupole time-of-flight mass spectrometry: Publication date: Available online 5 November 2026
Source: Journal of Chromatography A
Author(s):… #JChrom #MassSpecRSS
Source: Journal of Chromatography A
Author(s):… #JChrom #MassSpecRSS
The lowest order of gravitational radiation is quadrupole, not dipole, meaning it requires a change in the system's quadrupole moment. Electromagnetic radiation is primarily emitted as dipole radiation
November 2, 2026 at 4:42 PM
The lowest order of gravitational radiation is quadrupole, not dipole, meaning it requires a change in the system's quadrupole moment. Electromagnetic radiation is primarily emitted as dipole radiation
Quadrupole radiation is the dominant form of gravitational wave emission.
The energy flux is proportional to the third time derivative of the system's mass quadrupole moment, 𝐼ᵢⱼ
The energy flux is proportional to the third time derivative of the system's mass quadrupole moment, 𝐼ᵢⱼ
November 2, 2026 at 4:43 PM
Quadrupole radiation is the dominant form of gravitational wave emission.
The energy flux is proportional to the third time derivative of the system's mass quadrupole moment, 𝐼ᵢⱼ
The energy flux is proportional to the third time derivative of the system's mass quadrupole moment, 𝐼ᵢⱼ
Timo Fleig: Atomic Static Electric Quadrupole Polarizability from Relativistic Many-Body Theory With Application To Thulium $\left(6s^2\, 4f^{13}\right)$\, $^2F_{7/2}$ and $^2F_{5/2}$ https://arxiv.org/abs/2611.08348 https://arxiv.org/pdf/2611.08348 https://arxiv.org/html/2611.08348
November 6, 2026 at 6:56 AM
Timo Fleig: Atomic Static Electric Quadrupole Polarizability from Relativistic Many-Body Theory With Application To Thulium $\left(6s^2\, 4f^{13}\right)$\, $^2F_{7/2}$ and $^2F_{5/2}$ https://arxiv.org/abs/2611.08348 https://arxiv.org/pdf/2611.08348 https://arxiv.org/html/2611.08348
C. M. Fajardo-Zambrano, et al.: Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy https://arxiv.org/abs/2611.04696 https://arxiv.org/pdf/2611.04696 https://arxiv.org/html/2611.04696
November 4, 2026 at 6:55 AM
C. M. Fajardo-Zambrano, et al.: Precise and accurate nuclear electric quadrupole moment of $^{223}$Ra from molecular spectroscopy https://arxiv.org/abs/2611.04696 https://arxiv.org/pdf/2611.04696 https://arxiv.org/html/2611.04696
Gravitational:
Quadrupole (due to conservation of linear momentum, which forces the dipole moment to be constant).
Quadrupole (due to conservation of linear momentum, which forces the dipole moment to be constant).
November 2, 2026 at 6:25 PM
Gravitational:
Quadrupole (due to conservation of linear momentum, which forces the dipole moment to be constant).
Quadrupole (due to conservation of linear momentum, which forces the dipole moment to be constant).
Experimental realization of loss-induced quadrupole topology from a gapped trivial insulator in RLC circuits
https://arxiv.org/pdf/2611.02435
Wenxue He, Chen Wang, Fan Yang, Hechen Ren.
https://arxiv.org/pdf/2611.02435
Wenxue He, Chen Wang, Fan Yang, Hechen Ren.
https://arxiv.org/abs/2611.02435
arXiv abstract link
arxiv.org
November 4, 2026 at 5:28 AM
Experimental realization of loss-induced quadrupole topology from a gapped trivial insulator in RLC circuits
https://arxiv.org/pdf/2611.02435
Wenxue He, Chen Wang, Fan Yang, Hechen Ren.
https://arxiv.org/pdf/2611.02435
Wenxue He, Chen Wang, Fan Yang, Hechen Ren.
A time-varying quadrupole moment, which describes how a system's mass distribution deviates from spherical symmetry, can generate gravitational waves.
November 2, 2026 at 6:16 PM
A time-varying quadrupole moment, which describes how a system's mass distribution deviates from spherical symmetry, can generate gravitational waves.
A time-varying quadrupole moment, which describes how a system's mass distribution deviates from spherical symmetry, can generate gravitational waves.
November 2, 2026 at 4:47 PM
A time-varying quadrupole moment, which describes how a system's mass distribution deviates from spherical symmetry, can generate gravitational waves.
For nuclei with a quantum spin number, (𝐼 > ½), a permanent electric quadrupole moment is present due to their non-spherical charge distribution.
November 2, 2026 at 6:22 PM
For nuclei with a quantum spin number, (𝐼 > ½), a permanent electric quadrupole moment is present due to their non-spherical charge distribution.
A varying quadrupole moment is the lowest-order multipole that can cause radiation in a non-dipole system, such as gravitational waves.
November 2, 2026 at 6:20 PM
A varying quadrupole moment is the lowest-order multipole that can cause radiation in a non-dipole system, such as gravitational waves.
Expressing the gravitational wave strain in the transverse traceless gauge, by replacing the mass quadrupole moment 𝐼ᵢⱼ with the transverse traceless projection 𝐼ᵀᵀᵢⱼ
November 2, 2026 at 6:17 PM
Expressing the gravitational wave strain in the transverse traceless gauge, by replacing the mass quadrupole moment 𝐼ᵢⱼ with the transverse traceless projection 𝐼ᵀᵀᵢⱼ
Corner responses show a new quantum phase in RLC circuits
Read more:
https://quantumzeitgeist.com/tianjin-university-quantum-phase-rlc-corner/
Read more:
https://quantumzeitgeist.com/tianjin-university-quantum-phase-rlc-corner/
Corner Responses Show A New Quantum Phase In RLC Circuits
Researchers demonstrate a new Quantum Phase in RLC circuits, realizing loss-induced quadrupole topology from a gapped trivial insulator.
quantumzeitgeist.com
November 4, 2026 at 1:06 PM
Corner responses show a new quantum phase in RLC circuits
Read more:
https://quantumzeitgeist.com/tianjin-university-quantum-phase-rlc-corner/
Read more:
https://quantumzeitgeist.com/tianjin-university-quantum-phase-rlc-corner/
In NMR, the interaction of the nuclear quadrupole moment with a non-uniform electric field gradient causes extensive peak broadening and alters the nuclear spin energy levels.
November 2, 2026 at 6:22 PM
In NMR, the interaction of the nuclear quadrupole moment with a non-uniform electric field gradient causes extensive peak broadening and alters the nuclear spin energy levels.
Since these lower-order moments are forbidden from radiating due to fundamental conservation laws, the first possible source of gravitational radiation is the mass-quadrupole moment.
November 2, 2026 at 4:47 PM
Since these lower-order moments are forbidden from radiating due to fundamental conservation laws, the first possible source of gravitational radiation is the mass-quadrupole moment.