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Showing 1–17 of 17 results for all: bray-ali, n

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  1. arXiv:2308.11650  [pdf, ps, other

    hep-ph

    Standard Model Muon Magnetic Dipole Moment

    Authors: Noah Bray-Ali

    Abstract: The most recent high-precision determination of the hadronic leading order contribution to the muon magnetic dipole moment within the Standard Model of particle physics has revealed a five standard deviation discrepancy with the previous determination with the highest precision. A systematic effect of the luminous volume created during the measurements leading to the determinations seems to be the… ▽ More

    Submitted 5 October, 2023; v1 submitted 19 August, 2023; originally announced August 2023.

    Comments: Five pages, three tables. Updated following discussions in Muon g-2 Theory Initiative Hadronic Vacuum Polarization Working Group

  2. arXiv:2305.05624  [pdf, other

    physics.bio-ph hep-ph q-bio.BM

    Spontaneous Mutations from Terahertz Proton Tunneling

    Authors: Noah Bray-Ali

    Abstract: Protons in the gap between base pairs of the double helix store the code of life by breaking the chiral symmetry that swaps the sense strand with its complementary partner. When these hydrogen bonds break during replication and transcription, pairs of protons switch sides restoring chiral symmetry and destroying genetic information. Using time-independent second-order perturbation theory, we show… ▽ More

    Submitted 14 August, 2023; v1 submitted 13 April, 2023; originally announced May 2023.

    Comments: 6 pages, 1 figure, polished in preparation for 2023 American Chemical Society meeting

  3. arXiv:2203.15810  [pdf, other

    hep-ph hep-ex hep-lat nucl-ex nucl-th

    Prospects for precise predictions of $a_μ$ in the Standard Model

    Authors: G. Colangelo, M. Davier, A. X. El-Khadra, M. Hoferichter, C. Lehner, L. Lellouch, T. Mibe, B. L. Roberts, T. Teubner, H. Wittig, B. Ananthanarayan, A. Bashir, J. Bijnens, T. Blum, P. Boyle, N. Bray-Ali, I. Caprini, C. M. Carloni Calame, O. Catà, M. Cè, J. Charles, N. H. Christ, F. Curciarello, I. Danilkin, D. Das , et al. (57 additional authors not shown)

    Abstract: We discuss the prospects for improving the precision on the hadronic corrections to the anomalous magnetic moment of the muon, and the plans of the Muon $g-2$ Theory Initiative to update the Standard Model prediction.

    Submitted 29 March, 2022; originally announced March 2022.

    Comments: Contribution to the US Community Study on the Future of Particle Physics (Snowmass 2021)

    Report number: FERMILAB-CONF-22-236-T, LTH 1303, MITP-22-030

  4. arXiv:2108.12243  [pdf, other

    hep-ph cond-mat.str-el hep-ex hep-th

    Weighing the Axion with Muon Haloscopy

    Authors: Noah Bray-Ali

    Abstract: Recent measurements of muon spin precession confirm a long-standing tension with the standard model of particle physics. We argue that axions form the dark matter in the universe and that axions from the local dark matter halo of the galaxy are responsible for the tension. The argument gives a percent level prediction for the mass of the axion that can be tested by measuring the mid-infrared elect… ▽ More

    Submitted 15 March, 2024; v1 submitted 27 August, 2021; originally announced August 2021.

    Comments: 5 pages, 2 figure. Updated axial phase rotation symmetry. Now with Raman

  5. arXiv:1908.09253  [pdf, ps, other

    quant-ph cs.IT hep-th

    Holographic Code Rate

    Authors: Noah Bray-Ali, David Chester, Dugan Hammock, Marcelo M. Amaral, Klee Irwin, Michael F. Rios

    Abstract: Holographic codes grown with perfect tensors on regular hyperbolic tessellations using an inflation rule protect quantum information stored in the bulk from errors on the boundary provided the code rate is less than one. Hyperbolic geometry bounds the holographic code rate and guarantees quantum error correction for codes grown with any inflation rule on all regular hyperbolic tessellations in a c… ▽ More

    Submitted 25 August, 2019; originally announced August 2019.

    Comments: 7 pages, 4 figures, 3 tables

  6. arXiv:1709.08726  [pdf, ps, other

    cond-mat.str-el cond-mat.supr-con

    Standard Temperature and Pressure Superconductivity

    Authors: Noah Bray-Ali

    Abstract: Superconductivity at standard temperature and pressure is far from the extreme conditions where new fundamental laws of physics are expected to arise. Yet it is widely believed that the Landau-Ginzburg-Wilson-Fisher paradigm of broken symmetry and renormalization does not give a satisfactory account of the phenomenon. Almost a decade ago, we used the Bardeen-Cooper-Shrieffer wavefunction to show t… ▽ More

    Submitted 25 September, 2017; originally announced September 2017.

    Comments: 2 pages, 1 figure, 2nd International Workshop Towards Room Temperature Superconductivity held 2017 at Institute for Quantum Studies, Chapman University

    Journal ref: Quantum Stud.: Math. Found. (2018) 5:137-140

  7. arXiv:1302.5431  [pdf, other

    cond-mat.str-el cond-mat.mes-hall

    Direct observation of the Mott gap in strontium iridate with a scanning tunneling microscope

    Authors: John Nichols, Noah Bray-Ali, Gang Cao, Kwok-Wai Ng

    Abstract: The single-layer Mott insulator strontium iridate Sr$_2$IrO$_4$ was studied using a scanning tunneling microscope. This measurement technique is unique due to the transport properties of this Mott insulator allowing tunneling measurements to be performed, even at cryogenic temperatures. We obtained high-resolution images of the sample surface and the differential tunneling conductance at different… ▽ More

    Submitted 21 February, 2013; originally announced February 2013.

    Comments: 5 pages, 4 figures, submitted to Phys. Rev. B

    Journal ref: Phys. Rev. B 89, 085125 (2014)

  8. arXiv:1105.3100  [pdf, other

    cond-mat.quant-gas

    Chern numbers hiding in time-of-flight images

    Authors: Erhai Zhao, Noah Bray-Ali, Carl J. Williams, I. B. Spielman, Indubala I. Satija

    Abstract: We present a technique for detecting topological invariants -- Chern numbers -- from time-of-flight images of ultra-cold atoms. We show that the Chern numbers of integer quantum Hall states of lattice fermions leave their fingerprints in the atoms' momentum distribution. We analytically demonstrate that the number of local maxima in the momentum distribution is equal to the Chern number in two lim… ▽ More

    Submitted 6 January, 2012; v1 submitted 16 May, 2011; originally announced May 2011.

    Comments: Published version

    Journal ref: Phys. Rev. A 84, 063629 (2011)

  9. Bilayer Quantum Hall Ferromagnet in a Periodic Potential

    Authors: Jianmin Sun, Ganpathy Murthy, H. A. Fertig, Noah Bray-Ali

    Abstract: The bilayer quantum Hall system at a total filling of $ν_T=1$ has long resisted explanation in terms of a true counterflow superfluid, though many experimental features can be seen to be "almost" that of a superfluid. It is widely believed that quenched disorder is the root cause of this puzzle. Here we model the nonperturbative effects of disorder by investigating the $ν=1$ bilayer in a strong pe… ▽ More

    Submitted 10 March, 2010; originally announced March 2010.

    Journal ref: Phys. Rev. B 81, 195314 (2010) - Published May 13, 2010

  10. arXiv:0908.0104  [pdf, ps, other

    cond-mat.dis-nn cond-mat.mes-hall

    Fractal dimension and threshold properties in a spatially correlated percolation model

    Authors: Hongting Yang, Wen Zhang, Noah Bray-Ali, Stephan Haas

    Abstract: We consider the effects of spatial correlations in a two-dimensional site percolation model. By generalizing the Newman-Ziff Monte Carlo algorithm to include spatial correlations, percolation thresholds and fractal dimensions of percolation clusters are obtained. For a wide range of spatial correlations, the percolation threshold differs little from the uncorrelated result. In contrast, the frac… ▽ More

    Submitted 8 August, 2009; v1 submitted 1 August, 2009; originally announced August 2009.

    Comments: 5 pages, 3 figures, submitted version

  11. arXiv:0905.2946  [pdf, ps, other

    cond-mat.str-el cond-mat.mes-hall

    Topological order in paired states of fermions in two-dimensions with breaking of parity and time-reversal symmetries

    Authors: N. Bray-Ali, L. Ding, S. Haas

    Abstract: We numerically evaluate the entanglement spectrum (singular value decomposition of the wavefunction) of paired states of fermions in two dimensions that break parity and time-reversal symmetries, focusing on the spin-polarized $p_x+ip_y$ case. The entanglement spectrum of the weak-pairing (BCS) phase contains a Majorana zero mode, indicating non-Abelian topological order. In contrast, for the st… ▽ More

    Submitted 19 August, 2009; v1 submitted 18 May, 2009; originally announced May 2009.

    Comments: 4 pages, 4 figures; submitted version

    Journal ref: Phys. Rev. B 80, 180504(R) (2009)

  12. arXiv:0803.0984  [pdf, ps, other

    cond-mat.mes-hall

    Conservation and persistence of spin currents and their relation to the Lieb-Schulz-Mattis twist operators

    Authors: N. Bray-Ali, Z. Nussinov

    Abstract: Systems with spin-orbit coupling do not conserve "bare" spin current $\bf{j}$. A recent proposal for a conserved spin current $\bf{J}$ [J. Shi {\it et.al} Phys. Rev. Lett. {\bf 96}, 076604 (2006)] does not flow persistently in equilibrium. We suggest another conserved spin current $\bar{\bf{J}}$ that may flow persistently in equilibrium. We give two arguments for the instability of persistent cu… ▽ More

    Submitted 15 May, 2009; v1 submitted 7 March, 2008; originally announced March 2008.

    Comments: 5 pages; added references, simplified notation, clearer introduction

    Journal ref: Phys. Rev. B 80, 012401 (2009)

  13. arXiv:0801.2473  [pdf, other

    cond-mat.stat-mech cond-mat.other quant-ph

    The fidelity approach to the Hubbard model

    Authors: L. Campos Venuti, M. Cozzini, P. Buonsante, F. Massel, N. Bray-Ali, P. Zanardi

    Abstract: …the phase diagram, with particular care to the critical points. Specifically we show that close to the Mott transition, taking place at on-site repulsion U=0 and electron density n=1, the fidelity metric satisfies an hyper-scaling form which we calculate. This implies that in general, as one approaches the critical point U=0,… ▽ More

    Submitted 20 June, 2008; v1 submitted 16 January, 2008; originally announced January 2008.

    Comments: 8 pages, 4 figures, added results on the hyper-scaling form of the fidelity metric

    Journal ref: Phys. Rev. B 78, 115410 (2008)

  14. arXiv:0801.0713  [pdf, ps, other

    cond-mat.str-el cond-mat.stat-mech quant-ph

    Subarea law of entanglement in nodal fermionic systems

    Authors: Letian Ding, Noah Bray-Ali, Rong Yu, Stephan Haas

    Abstract: We investigate the subarea law scaling properties of the block entropy in bipartite fermionic systems which do not have a finite Fermi surface. It is found that in gapped regimes the leading subarea term is a negative constant, whereas in critical regimes with point nodes the leading subarea law is a logarithmic additive term. At the phase boundary that separates the critical and non-critical re… ▽ More

    Submitted 24 September, 2008; v1 submitted 4 January, 2008; originally announced January 2008.

    Comments: 4 pages,4 figures; published version

    Journal ref: Phys. Rev. Lett. 100, 215701 (2008)

  15. arXiv:0709.4061  [pdf, ps, other

    cond-mat.str-el cond-mat.other

    Scaling Analysis and Application: Phase Diagram of Magnetic Nanorings and Elliptical Nanoparticles

    Authors: Wen Zhang, Rohit Singh, Noah Bray-Ali, Stephan Haas

    Abstract: The magnetic properties of single-domain nanoparticles with different geometric shapes, crystalline anisotropies and lattice structures are investigated. A recently proposed scaling approach is shown to be universal and in agreement with dimensional analysis coupled with an assumption of {\em incomplete} self-similarity. It is used to obtain phase diagrams of magnetic nanoparticles featuring thr… ▽ More

    Submitted 29 August, 2008; v1 submitted 25 September, 2007; originally announced September 2007.

    Comments: 9 pages, 7 figures; added references, and discussion, as suggested by referees

    Journal ref: Phys Rev B 77, 144428 (2008),

  16. arXiv:cond-mat/0507587  [pdf, ps, other

    cond-mat.dis-nn cond-mat.supr-con

    Ordering near the percolation threshold in models of 2D interacting bosons with quenched dilution

    Authors: N. Bray-Ali, J. E. Moore, T. Senthil, A. Vishwanath

    Abstract: Randomly diluted quantum boson and spin models in two dimensions combine the physics of classical percolation with the well-known dimensionality dependence of ordering in quantum lattice models. This combination is rather subtle for models that order in two dimensions but have no true order in one dimension, as the percolation cluster near threshold is a fractal of dimension between 1 and 2: two… ▽ More

    Submitted 25 July, 2005; originally announced July 2005.

    Journal ref: Physical Review B 73, 064417 (2006)

  17. Quantum destruction of stiffness in diluted antiferromagnets and superconductors

    Authors: N. Bray-Ali, J. E. Moore

    Abstract: The reduction of 2D superconducting or antiferromagnetic order by random dilution is studied as a model for the 2D diluted Heisenberg antiferromagnet (DHAF) La$_2$Cu$_{1-p}$(Zn,Mg)$_p$O$_4$ and randomly inhomogeneous 2D suerconductors. We show in simplified models that long-range order can persist at the percolation threshold despite the presence of disordered one-dimensional segments, contrary… ▽ More

    Submitted 10 October, 2003; v1 submitted 30 April, 2003; originally announced May 2003.

    Comments: 4 pages, 3 figures

    Journal ref: Phys. Rev. B 69, 184505 (2004)