Limit on Lorentz and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:math>violation of the bound neutron using a free precession<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts /><mml:none /><mml:mn>3</mml:mn></mml:mmultiscripts><mml:mo>/</mml:mo><mml:mmultiscripts><mml:mi>Xe</mml:mi><mml:mprescripts /><mml:none /><mml:mn>129</mml:mn></mml:mmul

Gemmel, Claudia; Heil, W.; Karpuk, S.; Lenz, K.; Sobolev, Yu.; Tullney, K.; Burghoff, M.; Kilian, Wolfgang; Knappe-Grüneberg, S.; Müller, Wolfgang; Schnabel, A.; Seifert, F.; Trahms, Lutz; Schmidt, Ulrich

doi:10.1103/physrevd.82.111901

Cited by 71 publications

(50 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the He-Xe magnetometer, the comagnetometry is difficult to quantify simply, as it is dependent on the time-dependent drifts in the magnetic field. However, for simplicity, we assume a constant conservative shielding factor of 10 2 on the nuclear magnetic moment as demonstrated by the measurement in [73]. The comagnetometry measurement for atom interferometry as described in Sec.…”

Section: Appendix: Magnetic Field Backgroundsmentioning

confidence: 99%

“…The nuclear spins are then tipped perpendicular to and precess around the holding field, and the oscillating magnetic field generated by the precessing nuclear magnetic moments is then measured using a SQUID, with ∼1 fT/ ffiffiffiffiffiffi Hz p sensitivity. The strength of the guiding magnetic field is chosen such that the two samples have precession frequencies on the order of 10 Hz, which is low enough to allow for long interrogation times but still above the low-frequency vibrational noise picked up by the SQUID detector [73].…”

mentioning

confidence: 99%

“…To remove the effects of magnetic field drifts in the laboratory, a weighted frequency difference is calcu- 73]. We discuss two separate methods for analyzing an oscillating signal at low and high frequencies, but these two methods naturally merge into each other and thus are only represented together in Fig.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Spin precession experiments for light axionic dark matter

et al. 2018

View full text Add to dashboard Cite

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, axionlike particles and hidden photons, can be as light as roughly 10 −22 eV (∼10 −8 Hz), with astrophysical anomalies providing motivation for the lightest masses ("fuzzy dark matter"). We propose experimental techniques for direct detection of axionlike dark matter in the mass range from roughly 10 −13 eV (∼10 2 Hz) down to the lowest possible masses. In this range, these axionlike particles act as a time-oscillating magnetic field coupling only to spin, inducing effects such as a timeoscillating torque and periodic variations in the spin-precession frequency with the frequency and direction of these effects set by the axion field. We describe how these signals can be measured using existing experimental technology, including torsion pendulums, atomic magnetometers, and atom interferometry. These experiments demonstrate a strong discovery capability, with future iterations of these experiments capable of pushing several orders of magnitude past current astrophysical bounds.

show abstract

Section: Appendix: Magnetic Field Backgroundsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Spin precession experiments for light axionic dark matter

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In this paper, we discuss clock-comparison experiments [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], a particular class of experiments, which have yielded some of the highest sensitivity to Lorentz-violating effects in ordinary matter [27].…”

Section: Introductionmentioning

confidence: 99%

Using Comparisons of Clock Frequencies and Sidereal Variation to Probe Lorentz Violation

Lane

2017

Symmetry

View full text Add to dashboard Cite

show abstract

“…Examples of such high resolution experiments are spin experiments with 3 He or 129 Xe [1], neutrons [2,3], ultra-low field NMR [4], or MRI [5] or biomagnetic recordings [6]. Each of these experiments has special magnetic requirements, like low residual magnetic fields, low magnetic field gradients and/or low residual field drifts.…”

Section: Introductionmentioning

confidence: 99%

Measures to reduce the residual field and field gradient inside a magnetically shielded room by a factor of more than 10

Voigt¹,

Knappe-Grüneberg²,

Schnabel³

et al. 2013

Metrology and Measurement Systems

View full text Add to dashboard Cite

Very low residual magnetic field and field gradients are essential for a number of high resolution fundamental physical experiments and for further improvement of very sensitive magnetic measurement devices. The scope ranges from spin precession experiments, e.g. with 3 He or neutrons, to biomagnetic measurements, like magnetoencephalograms, and to low field MR spectroscopy. One method of reducing environmental magnetic noise is to use a magnetically shielded room (MSR). Here, measures are demonstrated to improve residual field and field gradient inside a common MSR by a factor of more than 10 by a specific degaussing procedure, material selection of prefabricated parts and active shielding. The process is independent of the shielding factor and works also properly for heavily shielded rooms.

show abstract

Limit on Lorentz andCPTviolation of the bound neutron using a free precessionHe3/Xe129

Cited by 71 publications

References 31 publications

Spin precession experiments for light axionic dark matter

Spin precession experiments for light axionic dark matter

Using Comparisons of Clock Frequencies and Sidereal Variation to Probe Lorentz Violation

Measures to reduce the residual field and field gradient inside a magnetically shielded room by a factor of more than 10

Contact Info

Product

Resources

About