249,427 Hits in 3.0 sec


Lowell A. Carmony, Soon Teck Tan
1981 Discrete Mathematics  
The following theorem is the key to our chxacterization of a'-quasi-symmetry. Thewean 3.9.  ...  Hence in what tallows we are only interested in designs with k s&l. The followin sequence of propositions will help to eliminate many special cases when we attempt tu characterize s-quasi-symmetry.  ... 
doi:10.1016/0012-365x(81)90018-2 fatcat:kpgr3isk4va2vhfikt5vss7bqu

Some mathematics for quasi-symmetry [article]

Joshua W. Burby, Nikos Kallinikos, Robert S. MacKay
2019 arXiv   pre-print
Quasi-symmetry of a steady magnetic field means integrability of first-order guiding-centre motion. Here we derive many restrictions on the possibilities for a quasi-symmetry.  ...  We also derive an analogue of the Grad-Shafranov equation for the flux function in a quasi-symmetric magnetohydrostatic field.  ...  We also want to thank Miles Wheeler for helpful suggestions about existence of solutions of the quasi-symmetric GS equation.  ... 
arXiv:1912.06468v1 fatcat:chexyg2mjvho5d6o3saa2dfvci

Symmetry dependence of localization in quasi-one-dimensional disordered wires

S. Kettemann
2000 Physical Review B (Condensed Matter)  
The crossover in energy level statistics of a quasi-1-dimensional disordered wire as a function of its length L is used, in order to derive its averaged localization length, without magnetic field, in  ...  analytical function of the magnetic field for the local level spacing is obtained, and found to be in excellent agreement with the magnetic field dependent activation energy, recently measured in low-mobility quasi-one-dimensional  ...  The integral over the crossection S of the wire is done, giving y 2 .  ... 
doi:10.1103/physrevb.62.r13282 fatcat:drrnerlxtrarjfkxkkz6gezmaa

Impact of inversion symmetry on a quasi-one-dimensional S = 1 system

Jin-Kwang Kim, Ranjith Kumar, U Burkhardt, Yurii Prots, Michael Baenitz, Martin Valldor
2020 Journal of Physics: Condensed Matter  
Here, we report the synthesis and magnetic properties of a novel, centrosymmetric, quasi-1D spin chain system La3VWS3O6, with hexagonal crystal structure (P63/m, a = 9.460 76(3), c = 5.518 09(2) Å).  ...  X-ray powder diffraction, specific heat, magnetization, 139La-nuclear magnetic resonance (NMR), and electric resistivity measurements indicate that the compound is a low dimensional magnet with an S =  ...  magnetic systems are usually quasi 2D or 3D.  ... 
doi:10.1088/1361-648x/ab7134 pmid:31997776 fatcat:iw3lvsioq5bedh42nh2ndskmgm

Quasi-Galois symmetries of the modularS-matrix

Jürgen Fuchs, Bert Schellekens, Christoph Schweigert
1996 Communications in Mathematical Physics  
In addition, quasi-Galois symmetries allow to construct modular invariants and to relate S-matrices as well as modular invariants at different levels.  ...  The recently introduced Galois symmetries of RCFT are generalized, for the WZW case, to 'quasi-Galois symmetries'.  ...  Note that the quasi-Galois symmetries imply that (5.24) commutes with S and T 2, while the step from (5.24) to (5.29) does not follow from any symmetry we know.  ... 
doi:10.1007/bf02099557 fatcat:uutqm6wrjjdsde2ci56hhcsnty

Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb_2O_6 [article]

Michele Fava, Radu Coldea, S. A. Parameswaran
2020 arXiv   pre-print
We construct a microscopic spin-exchange Hamiltonian for the quasi-1D Ising magnet CoNb_2O_6 that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor.  ...  We perform a symmetry analysis that recalls that an individual Ising chain in this material is buckled, with two sites in each unit cell related by a glide symmetry.  ...  SUPPLEMENTARY INFORMATION FOR "GLIDE SYMMETRY BREAKING AND ISING CRITICALITY IN THE QUASI-1D MAGNET CONB2O6" Dispersion of the 2-DW spectra in perturbation theory for different terms In this appendix we  ... 
arXiv:2004.04169v1 fatcat:h6ddw264wjdm7k645tppzyljwy

A flavor symmetry for quasi-degenerate neutrinos: $L_\mu - L_\tau$

S. Choubey, W. Rodejohann
2005 European Physical Journal C: Particles and Fields  
The most general neutrino mass matrix conserving L_mu - L_tau predicts quasi-degenerate neutrino masses with one maximal and two zero mixing angles.  ...  We consider the flavor symmetry L_mu - L_tau for the neutrino mass matrix.  ...  The plots are for the inverted mass ordering, the corresponding figure for the normal ordering looks basically identical. 13 −s 12 c 1312 23 − c 12 s 23 s 13 c 12 c 23 − s 12 s 23 s 13 s 23 c 13 s 12 s  ... 
doi:10.1140/epjc/s2005-02133-1 fatcat:5b2ux72cavfvpnlnk2mxcu7b3i

Some mathematics for quasi-symmetry

J. W. Burby, N. Kallinikos, R. S. MacKay
2020 Journal of Mathematical Physics  
If u is a quasi-symmetry for B, ψ is global, S is a bounded regular component of a level set of ψ (flux surface), and S contains a regular component T of a joint level set of either i.  ...  We see no incompatibility between this and quasi-symmetry, but it depends on there being some non-axisymmetric quasi-symmetries. Quasi-symmetry may be too strong an ideal to aim for.  ...  The conditions for quasi-symmetry are unchanged.  ... 
doi:10.1063/1.5142487 fatcat:pkh3dsoswbf33foqtcwt2g32fq

Midgap edge states and pairing symmetry of quasi-one-dimensional organic superconductors

K. Sengupta, Igor Žutić, Hyok-Jon Kwon, Victor M. Yakovenko, S. Das Sarma
2001 Physical Review B (Condensed Matter)  
The singlet s-, d- and triplet p-wave pairing symmetries in quasi-one-dimensional organic superconductors can be experimentally discriminated by probing the Andreev bound states at the sample edges.  ...  So the pairing symmetry in the Bechgaard salts remains hotly debated. In this paper, we propose a phase-sensitive method to distinguish experimentally between the s-, p-, and d-wave symmetries.  ...  At the interface, we impose the boundary conditions Ψ N = Ψ S andv N Ψ N =v S Ψ S + 2iHΨ N [32] , wherev N,S are the components of the velocity operators perpendicular to the interface in metal and superconductor  ... 
doi:10.1103/physrevb.63.144531 fatcat:cql7rsu5unfvjnuhf3ng6vfxrq

Symmetry and reciprocity constraints on diffraction by gratings of quasi-planar particles

S I Maslovski, D K Morits, S A Tretyakov
2009 Journal of Optics. A, Pure and applied optics  
Symmetry and reciprocity constraints on polarization state of the field diffracted by gratings of quasi-planar particles are considered.  ...  It is shown that the optical activity effects observed recently in arrays of quasi-planar plasmonic particles on a dielectric substrate are due to the reflection of the field at the air-dielectric slab  ...  Adding a dielectric substrate breaks mirror symmetry of a quasi-planar array and makes optical activity possible, as we have shown in the previous section.  ... 
doi:10.1088/1464-4258/11/7/074004 fatcat:aqepuek3u5gmjavz5o65mmibty

Quasi-Orthogonality of Some Hypergeometric and q-Hypergeometric Polynomials

Daniel D. Tcheutia, Alta S. Jooste, Wolfram Koepf
2018 Symmetry, Integrability and Geometry: Methods and Applications  
We use an algorithmic approach to find these linear combinations for each family applicable and these equations are used to prove quasi-orthogonality of order k.  ...  We show how to obtain linear combinations of polynomials in an orthogonal sequence {P_n}_n≥ 0, such as Q_n,k(x)=∑_i=0^k a_n,iP_n-i(x), a_n,0a_n,k≠0, that characterize quasi-orthogonal polynomials of order  ...  n + 2)S(n + 1)P n,2k (x) + a n (b n + b n+1 )S(n + 1)S(n)P n−1,2k (x) 2 Classical orthogonal polynomials on a q-linear lattice In this section we consider the quasi-orthogonality of sequences of monic  ... 
doi:10.3842/sigma.2018.051 fatcat:wg4vtfvsc5ayfboyhzgg2cqpwm

Magnetotunneling spectroscopy as a probe for pairing symmetry determination in quasi-two-dimensional anisotropic superconductors

Y. Tanuma, Y. Tanaka, K. Kuroki, S. Kashiwaya
2002 Physical Review B (Condensed Matter)  
As a probe to determine the pairing symmetry of quasi-two-dimensional anisotropic superconductors, we propose tunneling spectroscopy in the presence of magnetic field, where the magnetic field is parallel  ...  symmetry.  ...  The tunneling conductance spectrum at zero-energy is then given at low temperatures by the normalized SDOS 4 , ρ(θ) = ∞ −∞ dωρ S (ω)sech 2 ω 2k B T ∞ −∞ dωρ N (ω)sech 2 ω − t 2k B T , (8) ρ S (ω) = 1 2  ... 
doi:10.1103/physrevb.66.174502 fatcat:oznux4is3zgjbnfjijpqg4whum

Determination of pairing symmetry from magnetotunneling spectroscopy: A case study for quasi-one-dimensional organic superconductors

Y. Tanuma, K. Kuroki, Y. Tanaka, R. Arita, S. Kashiwaya, H. Aoki
2002 Physical Review B (Condensed Matter)  
The shape of the Fermi surface (quasi-one-dimensional in this example) affects sensitively the pairing symmetry, which in turn affects the shape (U or V) of the gap along with the presence/absence of the  ...  Yet, an application of a magnetic field enables us to identify the symmetry, which is interpreted as an effect of the Doppler shift in Andreev bound states.  ...  4) ρ S (ω) = k b ,ν |u ν 1 | 2 δ(ω − E ν ) + |v ν 1 | 2 δ(ω + E ν ) . (5) Here ρ S (ω) denotes the surface density of states for the superconducting state while ρ N (ω) the bulk density of states in the  ... 
doi:10.1103/physrevb.66.094507 fatcat:uxj2rh7ouzhhzklccd4kmd7jry

Interplay between the extended s-wave symmetry of the gap and the spin-orbit coupling in the low-electron concentration regime of quasi-two-dimensional superconductors [article]

M. Zegrodnik, P. Wójcik
2022 arXiv   pre-print
We show that the extended s-wave pairing symmetry is the most probable scenario to appear in the low-electron concentration regime.  ...  In such situation, due to the C_4 symmetry breaking, a small d-wave and p-wave contributions to the pairing appear, which significantly change the character of the FFLO state.  ...  This effect may be potentially useful in the search of quasi-two dimensional superconductors with higher T c 's.  ... 
arXiv:2205.03632v1 fatcat:acyd2iskdfbl5gereop2fvvhju

Periodic, Quasi-Periodic, and Chaotic Motions to Diagnose a Crack on a Horizontally Supported Nonlinear Rotor System

Nasser A. Saeed, Mohamed S. Mohamed, Sayed K. Elagan
2020 Symmetry  
that the cracked system whirling motion is subjected to a continuous qualitative change as the crack size increases for the superharmonic resonance case, where the system can exhibit period-1, period-2, quasi-periodic  ...  Symmetry 2020, 12, x FOR PEER REVIEW 10 of 22 0.39 < λ ≤ 0.422 the system executes period-3 motion, but for 0.422 < λ ≤ 0. 45 the system exhibits a quasi-periodic motion again.  ...  (a) (b) (c) (d) (a) (b) (c) (d) (e) (f) Symmetry 2020, 12, x FOR PEER REVIEW 8 of 22 (g) (h) (i) (j) (k) (l) (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l) Symmetry 2020, 12, x FOR PEER REVIEW 9 of 22  ... 
doi:10.3390/sym12122059 fatcat:bfuz5c4wgbdw5hze4xm7pvoek4
« Previous Showing results 1 — 15 out of 249,427 results