Publications (47)
Detection of precursor charge-density-wave order in 2H-NbSe2 by muSR
C. Gomez, D. Braam, S. Tezok +1
We demonstrate the sensitivity of transverse-field muon spin rotation (TF-muSR) to static charge-density-wave (CDW) order in the bulk of 2H-NbSe2. In the presence of CDW order the…
On the Algebraic Structure of the Holomorphic Anomaly for N=2 Topological Strings
C. Gomez, E. Lopez
The special geometry (-equations) for twisted strings are derived as consistency conditions of a new contact term algebra. The dilaton appears in the contact te…
From Quantum Monodromy to Duality
C. Gomez, E. Lopez
For SUSY theories with non-vanishing -function and one-dimensional quantum moduli, we study the representation on the special coordinates of the group of motions on t…
New Integrable Deformations of Higher Spin Heisenberg-Ising Chains
C. Gomez, G. Sierra
We show that the anisotropic Heisenberg-Ising chains with higher spin allow, for special values of the anisotropy, integrable deformations intimately related to the theory of quant…
Zero-Field muSR Search for a Time-Reversal-Symmetry-Breaking Mixed Pairing State in Superconducting Ba1-xKxFe2As2
Z. Lotfi Mahyari, A. Cannell, C. Gomez +6
We report the results of a zero-field muon spin relaxation (ZF-muSR) study of superconducting Ba1-xKxFe2As2 (0.5 < x < 0.9) in search of weak spontaneous internal magnetic fields a…
Non-Critical Poincaré Invariant Bosonic String Backgrounds and Closed String Tachyons
E. Alvarez, C. Gomez, L. Hernandez
A new family of non critical bosonic string backgrounds in arbitrary space time dimension and with Poincaré invariance are presented. The metric warping factor an…
-Fibrations and Softly Broken Supersymmetric Gauge Theories
C. Gomez, R. Hernandez, E. Lopez
Global geometry of -fibration Calabi-Yau threefolds, with Hodge number , is used to define softly broken gauge theories, with the bare coupling con…
Marijuana on Main Streets? The Story Continues in Colombia: An Endogenous Three-part Model
A. Ramirez-Hassan, C. Gomez, S. Velasquez +1
Cannabis is the most common illicit drug, and understanding its demand is relevant to analyze the potential implications of its legalization. This paper proposes an endogenous thre…
Non-Critical Confining Strings and the Renormalization Group
E. Alvarez, C. Gomez
String vacua for non critical strings satisfying the requirements of Zig-Zag invariance are constructed. The Liouville mode is shown to play the rôle of scale in the Renormalizati…
Magnetic properties of the helimagnet Cr1/3NbS2 observed by muSR
D. Braam, C. Gomez, S. Tezok +5
We have performed muon spin rotation/relaxation (muSR) measurements on single crystals of the chiral helimagnet Cr1/3NbS2 at zero to low magnetic field. The transition from the par…
On the integrability of N=2 Landau-Ginzburg models: A graph generalization of the Yang-Baxter equation
C. Gomez, G. Sierra
The study of the integrability properties of the N=2 Landau- Ginzburg models leads naturally to a graph generalization of the Yang-Baxter equation which synthetizes the well known…
Holography and the C-Theorem
E. Alvarez, C. Gomez
We review the geometric definition of C-function in the context of field theories that admit a holographic gravity dual.
On the integrability of N=2 supersymmetric massive theories
C. Gomez, G. Sierra
In this paper we propose a criteria to establish the integrability of N=2 supersymmetric massive theories.The basic data required are the vacua and the spectrum of Bogomolnyi solit…
q--Magnetism at roots of unity
A. Berkovich, G. Sierra, C. Gomez
We study the thermodynamic properties of a family of integrable 1D spin chain hamiltonians associated with quantum groups at roots of unity. These hamiltonians depend for each prim…
Coherent control of a solid-state quantum bit with few-photon pulses
V. Giesz, N. Somaschi, G. Hornecker +12
Single photons are the natural link between the nodes of a quantum network: they coherently propagate and interact with many types of quantum bits including natural and artificial…
QPACE -- a QCD parallel computer based on Cell processors
H. Baier, H. Boettiger, M. Drochner +32
QPACE is a novel parallel computer which has been developed to be primarily used for lattice QCD simulations. The compute power is provided by the IBM PowerXCell 8i processor, an e…
A Comment on Fisher Information and Quantum Algorithms
J. J. Alvarez, C. Gomez
We show that Grover's algorithm defines a geodesic in quantum Hilbert space with the Fubini-Study metric. From statistical point of view Grover's algorithm is characterized by cons…
Centralised Design and Production of the Ultra-High Vacuum and Laser-Stabilisation Systems for the AION Ultra-Cold Strontium Laboratories
B. Stray, O. Ennis, S. Hedges +69
This paper outlines the centralised design and production of the Ultra-High-Vacuum sidearm and Laser-Stabilisation systems for the AION Ultra-Cold Strontium Laboratories. Commissio…
Unstable and stable regimes of polariton condensation
F. Baboux, D. De Bernardis, V. Goblot +10
Modulational instabilities play a key role in a wide range of nonlinear optical phenomena, leading e.g. to the formation of spatial and temporal solitons, rogue waves and chaotic d…
Quantum Harmonic Oscillator Algebra and Link Invariants
C. Gomez, G. Sierra
The --deformation of the harmonic oscillator algebra is defined and proved to be a Ribbon Hopf algebra.Associated with this Hopf algebra we define an infinite dimens…
Integrability, Duality and Strings
C. Gomez, R. Hernandez, E. Lopez
In these notes evidence is presented for intepreting the moduli space of the integrable model associated to gauge theories with matter content, in terms of Cala…
-Duality and the Calabi-Yau Interpretation of the to Flow
C. Gomez, R. Hernandez, E. Lopez
The action of the -duality group on the moduli of the Calabi-Yau manifold $W\IP^{12}_{11226}$ appearing in the rank two dual pair $(K^{3}\times T^{2}/W\IP^{12}_{11226}…
Topology and Strings: Topics in
C. Gomez, E. Lopez
A review on topological strings and the geometry of the space of two dimensional theories. (Lectures given by C. Gomez at the Enrico Fermi Summer School, Varenna, July 1994)
Preliminary Report of the AMS analysis of tsunami deposits in Tohoku -- Japan -- 18th to the 21st Century
P. Wassmer, C. Gomez, D. E. Hart +4
Sedimentary records of tsunamis are a precious tool to assess the occurrence of past events, as attested by an abundant literature, which has seen a particular 'boom' in the afterm…
The Holographic Principle and the Renormalization Group
E. Alvarez, C. Gomez
We prove a c-theorem for holographic theories.
Entanglement, Observers and Cosmology: a view from von Neumann Algebras
C. Gomez
Infinite entanglement fluctuations appear when a quantum field theory on a causally complete domain of space-time is a type factor. In the weak gravity limit this fac…
On the String Interpretation of the -geometry
C. Gomez, E. Lopez
We derive the -equations for generic topological field theories as consistency conditions for the contact term algebra of topological strings. A generalization…
L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam
D. Defrère, O. Absil, P. Hinz +20
We present the first observations obtained with the L'-band AGPM vortex coronagraph recently installed on LBTI/LMIRCam. The AGPM (Annular Groove Phase Mask) is a vector vortex coro…
Black Hole Formation and Classicalization in Ultra-Planckian 2 -> N Scattering
G. Dvali, C. Gomez, R. S. Isermann +2
We establish a connection between the ultra-Planckian scattering amplitudes in field and string theory and unitarization by black hole formation in these scattering processes. Usin…
Integrability, Jacobians and Calabi-Yau Threefolds
C. Gomez, R. Hernandez, E. Lopez
The integrable systems associated with Seiberg-Witten geometry are considered both from the Hitchin-Donagi-Witten gauge model and in terms of intermediate Jacobians of Calabi-Yau t…
Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states
O. Gladii, L. Frangou, G. Forestier +12
We investigated spin injection by spin pumping from a spin-injector(NiFe) into a spin-sink to detect spin fluctuations in the spin-sink. By scanning the ordering-temperature of sev…
String Representation of Wilson Loops
E. Alvarez, C. Gomez, T. Ortin
We explore the consequences of imposing Polyakov's zig/zag-invariance in the search for a confining string. We first find that the requirement of zig/zag-invariance seems to be inc…
Thermal tuning of dynamic response in Ag-based nanowire networks
J. I. Diaz Schneider, C. Gomez, C. Acha +3
Self-assembled networks of metallic nanowires (NWs) are being intensively explored as test benches for neuromorphic proposals. In this work, we study the electric transport propert…
Fields, Strings and Branes
C. Gomez, R. Hernandez
Lecture notes reviewing most recent developments in string/M/brane theory given by C. G. at the CIME Summer International Center of Mathematics at Cetraro. July 1997.
The Hidden Quantum Group of the 8-vertex Free Fermion Model: q-Clifford Algebras
R. Cuerno, C. Gomez, E. Lopez +1
We prove in this paper that the elliptic --matrix of the eight vertex free fermion model is the intertwiner --matrix of a quantum deformed Clifford--Hopf algebra. This algebr…
Gluon Saturation and Black Hole Criticality
L. Alvarez-Gaume, C. Gomez, A. Sabio Vera +2
We discuss the recent proposal in hep-th/0611312 where it was shown that the critical anomalous dimension associated to the onset of non-linear effects in the high energy limit of…
On Integrable Quantum Group Invariant Antiferromagnets
R. Cuerno, G. Sierra, C. Gomez
A new open spin chain hamiltonian is introduced. It is both integrable (Sklyanin`s type matrices are used to achieve this) and invariant under transformati…
Graph Quantum Groups
C. Gomez, G. Sierra
We define a new mathematical structure ( graph quantum group) which combines the tower of algebras associated with a graph and the structure of a Hopf algebra {\cal A}.…
The Quijote CMB Experiment
J. A. Rubino-Martin, R. Rebolo, M. Tucci +37
We present the current status of the QUIJOTE (Q-U-I JOint TEnerife) CMB Experiment, a new instrument which will start operations early 2009 at Teide Observatory, with the aim of ch…
A Note on the String Analog of Super-Symmetric Yang-Mills
C. Gomez, E. Lopez
A connection between the conifold locus of the type II string on the Calabi-Yau manifold and the geometry of the quantum moduli of super Yang-Mills…
Near optimal single photon sources in the solid state
N. Somaschi, V. Giesz, L. De Santis +15
Single-photons are key elements of many future quantum technologies, be it for the realisation of large-scale quantum communication networks for quantum simulation of chemical and…
On a New Class of Integrable Models
A. Berkovich, C. Gomez, G. SIERRA
We define a new class of integrable vertex models associated to quantum groups at roots of unit
12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD
J. Bartels, K. Borras, M. Diehl +118
Proceedings of the 12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD
Measuring topological invariants from generalized edge states in polaritonic quasicrystals
F. Baboux, E. Levy, A. Lemaître +7
We investigate the topological properties of Fibonacci quasicrystals using cavity polaritons. Composite structures made of the concatenation of two Fibonacci sequences allow invest…
Monolithic AlGaAs second-harmonic nanoantennas
V. F. Gili, L. Carletti, A. Locatelli +9
We demonstrate monolithic aluminum gallium arsenide (AlGaAs) optical anoantennas. Using a selective oxidation technique, we fabricate such epitaxial semiconductor nanoparticles on…
Penetration depth of Cooper pairs in the IrMn antiferromagnet
R. L. Seeger, G. Forestier, O. Gladii +8
Suppression of superconductivity due to the proximity effect between a superconductor and a ferromagnet can be partially alleviated when a Cooper pair simultaneously samples differ…
Spin-Anisotropy Commensurable Chains: Quantum Group Symmetries and N=2 SUSY
A. Berkovich, C. Gomez, G. Sierra
In this paper we consider a class of the 2D integrable models. These models are higher spin XXZ chains with an extra condition of the commensurability between spin and anisotropy.…