Flux transitions in a superconducting ring

Berger, Jorge

doi:10.1103/physrevb.67.014531

Cited by 14 publications

(13 citation statements)

References 38 publications

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“…We find that the corresponding result is somewhat higher and broader than our jointly resummed curve. We can compare this curve to previous analyses in the literature [9,15,16]. It turns out that our "pure-Q T " resummed result is about 30% higher (in the peak of the distribution) than the one of the Resbos [15] code, and about 20% higher than the result of [16].…”

Section: Predictions For the Resummed Higgs Cross Sectionsupporting

confidence: 64%

“…A new analysis for threshold resummation, including the recently calculated [4] next-to-next-to-leading logarithmic (NNLL) coefficients C (2) and D (2) , can be found in [13,14]. The resummed Higgs-Q T distribution has also recently been reinvestigated in [15,16,17], using the NNLL B (2) coefficient calculated in [18,19], and in [17] matched to the Higgs cross section at fixed Q T at NLO [20]. A complete understanding of soft gluon effects in differential distributions also requires a study of the relation between the two sets of corrections.…”

Section: Introductionmentioning

confidence: 99%

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Joint resummation for Higgs boson production

2004

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We study the application of the joint resummation formalism to Higgs boson production via gluon-gluon fusion at the CERN LHC, defining inverse transforms by analytic continuation. We work at next-to-leading logarithmic accuracy. We find that at low Q T the resummed Higgs Q T distributions are comparable in the joint and pure-Q T formalisms, with a relatively small influence from threshold enhancement in this range. We find a modest ͑about ten percent͒ decrease in the inclusive cross section, relative to pure threshold resummation.

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Section: Predictions For the Resummed Higgs Cross Sectionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Joint resummation for Higgs boson production

2004

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“…This experiment has lead to a recent growing interest in the mechanism of flux transition in superconducting loops. 13,28,29 Multiple flux jumps and irreversible behavior of the magnetization were observed in thin mesoscopic rings by Vodolazov et al 30 At low magnetic field and for rings with sufficiently large radii, they showed experimentally and theoretically, using the time-dependent GL theory, that the vorticity may change by values larger than 1.…”

Section: Introductionmentioning

confidence: 98%

Nucleation of superconductivity in a mesoscopic loop of varying width

2004

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We study the evolution of the superconducting state in a perforated disk by varying the size of the hole. The superconducting properties are investigated by means of transport measurements around the superconducting/normal phase boundary Tc(H). A transition from a one-dimensional to a two-dimensional regime is seen when increasing the magnetic field for disks with small holes. A good agreement is found between the measured Tc(H) line and the calculations performed in the framework of the linearized Ginzburg-Landau theory. The effect of breaking the axial symmetry of the structure by moving the hole away from the center of the disk is also studied. An enhanced critical field is found for the asymmetric structures, possibly due to the recovery of the singly connected state.Comment: 12 pages, 9 figures, accpeted for publication in Phys. Rev.

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“…Fewer studies have focused on investigating fluxoid dynamics and phase slip rates [8][9][10]17]. Theoretical studies have addressed fluxoid dynamics as a function of ring geometry and magnetic field [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Imaging phase slip dynamics in micron-size superconducting rings

2018

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We present a scanning probe technique for measuring the dynamics of individual fluxoid transitions in multiply connected superconducting structures. In these measurements, a small magnetic particle attached to the tip of a silicon cantilever is scanned over a micron-size superconducting ring fabricated from a thin aluminum film. We find that near the superconducting transition temperature of the aluminum, the dissipation and frequency of the cantilever changes significantly at particular locations where the tip-induced magnetic flux penetrating the ring causes the two lowest energy fluxoid states to become nearly degenerate. In this regime, we show that changes in the cantilever frequency and dissipation are well-described by a stochastic resonance (SR) process, wherein small oscillations of the cantilever in the presence of thermally activated phase slips (TAPS) in the ring give rise to a dynamical force that modifies the mechanical properties of the cantilever. Using the SR model, we calculate the average fluctuation rate of the TAPS as a function of temperature over a 32-dB range in frequency, and we compare it to the Langer-Ambegaokar-McCumber-Halperin theory for TAPS in one-dimensional superconducting structures. arXiv:1703.08184v2 [cond-mat.supr-con]

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Flux transitions in a superconducting ring

Cited by 14 publications

References 38 publications

Joint resummation for Higgs boson production

Joint resummation for Higgs boson production

Nucleation of superconductivity in a mesoscopic loop of varying width

Imaging phase slip dynamics in micron-size superconducting rings

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