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Third generation SUSY searches in CMS
https://cds.cern.ch/record/2220150
This conference report presents searches for direct pair production of third generation squark performed with a dataset of proton-proton collision at $\sqrt{s}=13~\mathrm{TeV}$ collected by the CMS experiment at the LHC, The data used correspond to an integrated luminosity of $2.3~\mathrm{fb}^{-1}$. No deviation from the standard model background is observed. The results are interpreted in the context of few simplified models. Within such models, stop masses up to 780~\mathrm{GeV} and sbottom masses up to 890~\mathrm{GeV} have been excluded at 95\%~$\mathrm{CL}$ for low mass neutralino.Chabert, Eric ChristianWed, 28 Sep 2016 20:55:53 GMT05 Sep 2016CMS-CR-2016-217https://cds.cern.ch/record/22201502016217Silicon pixel R&D for CLIC
https://cds.cern.ch/record/2220121
Challenging detector requirements are imposed by the physics goals at the future multi-TeV e+e- Compact Linear Collider (CLIC). A single point resolution of 3μm for the vertex detector and 7μm for the tracker is required. Moreover, the CLIC vertex detector and tracker need to be extremely light weighted with a material budget of 0.2 % X0 per layer in the ver- tex detector and 1-2%X0 in the tracker. A fast time slicing of 10ns is further required to suppress background from beam-beam interactions. A wide range of sensor and readout ASIC technologies are investigated within the CLIC silicon pixel R&D; effort. Various hybrid planar sensor assemblies with a pixel size of 25x25μm2 and 55x55μm2 have been produced and characterised by laboratory measurements and during test-beam campaigns. Experimental and simulation results for thin (50μm-500μm) slim edge and active-edge planar, and High-Voltage CMOS sensors hybridised to various readout ASICs (Timepix, Timepix3, CLICpix) are presented.Munker, Ruth MagdalenaWed, 28 Sep 2016 14:35:54 GMT2016-09-28CLICdp-Conf-2016-008https://cds.cern.ch/record/22201212016008$CP$-violating asymmetries from the decay-time distribution of prompt $D^0 \to K^+ K^-$ and $D^0 \to \pi^+\pi^-$ decays in the full $\mbox{LHCb}$ Run 1 data sample
https://cds.cern.ch/record/2220093
A study of indirect $CP$ violation in $D^0$ mesons is presented through a measurement of the asymmetry of the effective decay widths of $D^0$ and $\overline{D}^0$ mesons to $CP$ eigenstates. This observable, known as $A_{\Gamma}$, is measured with the $CP$ eigenstates $K^+ K^-$ and $\pi^+ \pi^-$ using data collected in $pp$ collisions by the LHCb experiment in 2012 with an integrated luminosity of $1.9\ \rm fb^{-1}$. The results are combined with a previously published LHCb measurement using this method for data collected in 2011 to yield average values of \begin{align*} A_{\Gamma}(D^0 \to K^+ K^-) = (-0.14 \pm0.37 \pm 0.10)\times 10^{-3}, \\ A_{\Gamma}(D^0\to \pi^+\pi^-) = ( \ 0.14\pm 0.63\pm 0.15)\times 10^{-3}, \end{align*} where the first quoted uncertainty is statistical, and the second systematic. The results are compatible with $CP$ conservation and with the Standard Model prediction.The LHCb CollaborationWed, 28 Sep 2016 10:05:59 GMT28 Sep 2016LHCb-CONF-2016-010https://cds.cern.ch/record/22200932016010$CP$-violating asymmetries from the decay-time distribution of prompt $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays in the full LHCb Run~1 data sample
https://cds.cern.ch/record/2220079
Time-dependent $CP$ asymmetries in the decay rates of the singly Cabibbo-suppressed decays $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ are measured in $pp$ collision data at centre-of-mass energies of $7$ and $8\,\mathrm{TeV}$ collected by the LHCb detector, corresponding to an integrated luminosity of $3\,\mathrm{fb}^{-1}$. The strong-interaction decay $D^{*+} \to D^0\pi^+$ is used to infer the flavour of the $D^0$ mesons at production. The asymmetries in effective decay widths between $D^0$ and $\overline{D}^0$ decays, sensitive to indirect $CP$ violation, are measured to be \begin{align*} A_\Gamma(D^0 \to K^+K^-) &= (-0.30 \pm 0.32 \pm 0.14)\times 10^{-3},\\ A_\Gamma(D^0 \to \pi^+\pi^-) &=(\phantom{-}0.46 \pm 0.58 \pm 0.16)\times 10^{-3}, \end{align*} where the first quoted uncertainty is statistical, and the second systematic. These measurements are consistent with $CP$ conservation and improve by nearly a factor two the previous world leading measurements, also obtained by LHCb using the 2011 subsample of the current data.The LHCb CollaborationWed, 28 Sep 2016 08:30:16 GMT28 Sep 2016LHCb-CONF-2016-009https://cds.cern.ch/record/22200792016009Pending
https://cds.cern.ch/record/2220078
PendingThe LHCb CollaborationWed, 28 Sep 2016 08:19:51 GMT28 Sep 2016LHCb-CONF-2016-008https://cds.cern.ch/record/22200782016008The $C \: ^1 \Sigma ^+$, $A \: ^1 \Sigma ^+$, and $b \: ^3 \Pi_{0^+}$ states of LiRb
https://cds.cern.ch/record/2220060
We present the first spectroscopic studies of the $C \ ^1\Sigma^+$ electronic state and the $A \ ^1\Sigma^+$ - $b \ ^3\Pi_{0^+}$ complex in $^7$Li - $^{85}$Rb. Using resonantly-enhanced, two-photon ionization, we observed $v = 7$, 9, 12, 13 and $26-44$ of the $C \ ^1\Sigma^+$ state. We augment the REMPI data with a form of depletion spectra in regions of dense spectral lines. The $A \ ^1\Sigma^+$ - $b \ ^3\Pi_{0^+}$ complex was observed with depletion spectroscopy, depleting to vibrational levels $v=0 \rightarrow 29$ of the $A \ ^1\Sigma^+$ state and $v=8 \rightarrow 18$ of the $b \ ^3\Pi_{0^+}$ state. For all three series, we determine the term energy and vibrational constants. Finally, we outline several possible future projects based on the data presented here.Stevenson, I CBlasing, D BChen, Y PElliott, D SWed, 28 Sep 2016 06:02:03 GMT27 Sep 2016arXiv:1609.08591https://cds.cern.ch/record/2220060['arXiv:1609.08591']arXiv:1609.08591Sewing Greenberger-Horne-Zeilinger states with a quantum zipper
https://cds.cern.ch/record/2220059
A mechanism of a chiral spin wave rotation is introduced to systematically generate mesoscopic Greenberger-Horne-Zeilinger states.Wang, Da-WeiWed, 28 Sep 2016 06:02:03 GMT27 Sep 2016arXiv:1609.08589https://cds.cern.ch/record/2220059['arXiv:1609.08589']arXiv:1609.08589Asymmetric de Finetti Theorem for Infinite-dimensional Quantum Systems
https://cds.cern.ch/record/2220058
The de Finetti representation theorem for continuous variable quantum system is first developed to approximate an N-partite continuous variable quantum state with a convex combination of independent and identical subsystems, which requires the original state to obey permutation symmetry conditioned on successful experimental verification on k of N subsystems. We generalize the de Finetti theorem to include asymmetric bounds on the variance of canonical observables and biased basis selection during the verification step. Our result thereby enables application of infinite-dimensional de Finetti theorem to situations where two conjugate measurements obey different statistics, such as the security analysis of quantum key distribution protocols based on squeezed state against coherent attack.Niu, Murphy YuezhenWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08584https://cds.cern.ch/record/2220058['arXiv:1609.08584']arXiv:1609.08584Phase- and intensity-dependence of ultrafast dynamics in hydrocarbon molecules in few-cycle laser fields
https://cds.cern.ch/record/2220057
In strong laser fields, sub-femtosecond control of chemical reactions with the carrier-envelope phase (CEP) becomes feasible. We have studied the control of reaction dynamics of acetylene and allene in intense few-cycle laser pulses at 750 nm, where ionic fragments are recorded with a reaction microscope. We find that by varying the CEP and intensity of the laser pulses it is possible to steer the motion of protons in the molecular dications, enabling control over deprotonation and isomerization reactions. The experimental results are compared to predictions from a quantum dynamical model, where the control is based on the manipulation of the phases of a vibrational wave packet by the laser waveform. The measured intensity dependence in the CEP-controlled deprotonation of acetylene is well captured by the model. In the case of the isomerization of acetylene, however, we find differences in the intensity dependence between experiment and theory. For the isomerization of allene, an inversion of the CEP-dependent asymmetry is observed when the intensity is varied, which we discuss in light of the quantum dynamical model. The inversion of the asymmetry is found to be consistent with a transition from non-sequential to sequential double ionization.Kübel, MatthiasBurger, ChristianSiemering, RobertKling, Nora GBergues, BorisAlnaser, Ali SBen-Itzhak, ItzikMoshammer, Robertde Vivie-Riedle, ReginaKling, Matthias FWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08577https://cds.cern.ch/record/2220057['arXiv:1609.08577']arXiv:1609.08577Carbon nanofiber-filled conductive silicone elastomers as soft, dry bioelectronic interfaces
https://cds.cern.ch/record/2220056
Soft and pliable conductive polymer composites hold promise for application as bioelectronic interfaces such as for electroencephalography (EEG). In clinical, laboratory, and real-world EEG there is a desire for dry, soft, and comfortable interfaces to the scalp that are capable of relaying the microvolt-level scalp potentials to signal processing electronics. A key challenge is that most material approaches are sensitive to deformation-induced shifts in electrical impedance associated with decreased signal-to-noise ratio. This is a particular concern in real-world environments where human motion is present. The entire set of brain information outside of tightly controlled laboratory or clinical settings are currently unobtainable due to this challenge. Here we explore the performance of an elastomeric material solution purposefully designed for dry, soft, comfortable scalp contact electrodes for EEG that is specifically targeted to have flat electrical impedance response to deformation to enable utilization in real world environments. A conductive carbon nanofiber filled polydimethylsiloxane (CNF-PDMS) elastomer was evaluated at three fill ratios (3, 4 and 7 volume percent). To evaluate usability for EEG, pre-recorded human EEG signals were replayed through the contact electrodes subjected to quasi-static compressive strains between zero and 35%. These tests show that conductive filler ratios well above the electrical percolation threshold are desirable in order to maximize signal-to-noise ratio and signal correlation with an ideal baseline. Increasing fill ratios yield increasingly flat electrical impedance response to large applied compressive deformations with a trade in increased material stiffness, and with nominal electrical impedance tunable over greater than 4 orders of magnitude.Slipher, G AHairston, W DMrozek, R AWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08565https://cds.cern.ch/record/2220056['arXiv:1609.08565']arXiv:1609.08565Many-body methods in agent-based epidemic models
https://cds.cern.ch/record/2220055
The susceptible-infected-susceptible (SIS) agent-based model is usually employed in the investigation of epidemics. The model describes a Markov process for a single communicable disease among susceptible (S) and infected (I) agents. However, the disease spreading forecasting is often restricted to numerical simulations, while analytic formulations lack both general results and perturbative approaches since they are subjected to asymmetric time generators. Here, we discuss perturbation theory, approximations and application of many-body techniques in epidemic models in the framework for squared norm of probability vector $|P(t)| ^2$, in which asymmetric time generators are replaced by their symmetric counterparts.Nakamura, Gilberto MMartinez, Alexandre SWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08556https://cds.cern.ch/record/2220055['arXiv:1609.08556']arXiv:1609.08556Multi-component vapor-liquid equilibrium model for LES and application to ECN Spray A
https://cds.cern.ch/record/2220053
We present and evaluate a detailed multi-species two-phase thermodynamic equilibrium model for large-eddy simulations (LES) of liquid-fuel injection and mixing at high pressure. The model can represent the coexistence of supercritical states and multi-component subcritical two-phase states. LES results for the transcritical Spray A of the Engine Combustion Network (ECN) are found to agree very well to available experimental data. We also address well-known numerical challenges of trans- and supercritical fluid mixing and compare a fully conservative formulation to a quasi conservative formulation of the governing equations. Our results prove physical and numerical consistency of both methods on fine grids and demonstrate the effects of energy conservation errors associated with the quasi conservative formulation on typical LES grids.Matheis, JanHickel, StefanWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08533https://cds.cern.ch/record/2220053['arXiv:1609.08533']arXiv:1609.08533Elastic Turbulence in Channel Flows at Low Reynolds number
https://cds.cern.ch/record/2220052
We experimentally demonstrate the existence of elastic turbulence in straight channel flow at low Reynolds numbers. Velocimetry measurements show non-periodic fluctuations in the wake of curved cylinders as well as in a parallel shear flow region. The flow in these two locations of the channel is excited over a broad range of frequencies and wavelengths, consistent with the main features of elastic turbulence. However, the decay of the initial elastic turbulence around the cylinders is followed by a growth downstream in the straight region. The emergence of distinct flow characteristics both in time and space suggests a new type of elastic turbulence, markedly different from that near the curved cylinders. We propose a self-sustaining mechanism to explain the sustained fluctuations in the parallel shear region.Qin, BoyangArratia, Paulo EWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08532https://cds.cern.ch/record/2220052['arXiv:1609.08532']arXiv:1609.08532Motion Estimation and Correction in Photoacoustic Tomographic Reconstruction
https://cds.cern.ch/record/2220051
Motion, e.g., due to patient movement or improper device calibration, is inevitable in many imaging modalities such as photoacoustic tomography (PAT) by a rotating system and can lead to undesirable motion artifacts in image reconstructions, if ignored. In this paper, we establish a hybrid-type model for PAT that incorporates motion in the model. We first introduce an approximate continuous model and establish two uniqueness results for simple parameterized motion models. Then we formulate the discrete problem of simultaneous motion estimation and image reconstruction as a separable nonlinear least squares problem and describe an automatic approach to detect and eliminate motion artifacts during the reconstruction process. Numerical examples validate our methods.Chung, JulianneNguyen, LinhWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08529https://cds.cern.ch/record/2220051['arXiv:1609.08529']arXiv:1609.08529Weakening and Shifting of the Saharan Heat Low Circulation During Wet Years of the West African Monsoon
https://cds.cern.ch/record/2220050
The correlation between increased West African monsoon rainfall and anomalously low surface pressure over the Sahara is well established in observations and global climate models, and has been interpreted as a strengthening of the Saharan Heat Low (SHL) during wet monsoon years. This study uses two atmospheric reanalysis datasets to examine interannual variability of Sahel rainfall and the shallow Saharan Heat Low circulation, which consists of the near surface SHL and the Saharan High in the lower mid-troposphere. During wet Sahel years, the SHL circulation shifts poleward, producing a drop in low-level geopotential height and surface pressure over the Sahara. Statistically removing the effect of the poleward shift from the low-level geopotential eliminates significant correlations between this geopotential and Sahel precipitation. As the SHL circulation shifts poleward, its mid-tropospheric divergent outflow decreases, indicating a weakening of its overturning mass flux. The poleward shift and weakening of the SHL circulation during wet Sahel years is reproduced in an idealized, zonally periodic model of West Africa; a wide range of imposed sea surface temperature and land surface albedo perturbations in this model produce a much larger range of variations in the SHL that nevertheless have similar quantitative associations with Sahel rainfall as in the reanalyses. These results disprove the idea that enhanced Sahel rainfall is caused by strengthening of the SHL overturning. Instead, a stronger SHL circulation inhibits Sahel rainfall, or some other forcing causes both an increase in Sahel rainfall and a weakening of the SHL circulation.Shekhar, RaviBoos, William RWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08515https://cds.cern.ch/record/2220050['arXiv:1609.08515']arXiv:1609.08515Low-Dose CT via Deep Neural Network
https://cds.cern.ch/record/2220049
In order to reduce the potential radiation risk, low-dose CT has attracted more and more attention. However, simply lowering the radiation dose will significantly degrade the imaging quality. In this paper, we propose a noise reduction method for low-dose CT via deep learning without accessing the original projection data. An architecture of deep convolutional neural network was considered to map the low-dose CT images into its corresponding normal-dose CT images patch by patch. Qualitative and quantitative evaluations demonstrate a state-the-art performance of the proposed method.Chen, HuZhang, YiZhang, WeihuaLiao, PeixiLi, KeZhou, JiliuWang, GeWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08508https://cds.cern.ch/record/2220049['arXiv:1609.08508']arXiv:1609.08508Pulse-shape discrimination and energy quenching of alpha particles in Cs$_2$LiLaBr$_6$:Ce$^{3+}$
https://cds.cern.ch/record/2220048
Cs$_2$LiLaBr$_6$:Ce$^{3+}$ (CLLB) is an elpasolite scintillator that offers excellent linearity and gamma-ray energy resolution and sensitivity to thermal neutrons with the ability to perform pulse-shape discrimination (PSD) to distinguish gammas and neutrons. Our investigation of CLLB has indicated the presence of intrinsic radioactive alpha background that we have determined to be from actinium contamination of the lanthanum component. We measured the pulse shapes for gamma, thermal neutron, and alpha events and determined that PSD can be performed to separate the alpha background with a moderate figure of merit of 0.98. We also measured the electron-equivalent-energy of the alpha particles in CLLB and simulated the intrinsic alpha background from $^{227}$Ac to determine the quenching factor of the alphas. A linear quenching relationship $L_{\alpha} = E_{\alpha} \times q + L_0$ was found at alpha particle energies above 5 MeV, with a quenching factor $q = 0.71$ MeVee/MeV and an offset $L_0 = - 1.19$ MeVee.Mesick, Katherine ECoupland, Daniel D SStonehill, Laura CWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08490https://cds.cern.ch/record/2220048['arXiv:1609.08490']arXiv:1609.08490Leveraging beam deformation to improve the detection of resonances
https://cds.cern.ch/record/2220047
Decades of work on beam deformation on reflection, and especially on lateral shifts, have spread the idea that a reflected beam is larger than the incident beam. However, when the right conditions are met, a beam reflected by a multilayered resonant structure can be 10\% narrower than the incoming beam. Such an easily measurable change occurs on a very narrow angular range close to a resonance, which can be leveraged to improve the resolution of sensors based on the detection of surface plasmon resonances by a factor three. We provide theoretical tools to deal with this effect, and a thorough physical discussion that leads to expect similar phenomenon to occur for temporal wavepackets and in other domains of physics.Pollès, RémiMihailovic, MartineCenteno, EmmanuelMoreau, AntoineWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08473https://cds.cern.ch/record/2220047['arXiv:1609.08473']arXiv:1609.08473Maximum range of a projectile thrown from constant-speed circular motion
https://cds.cern.ch/record/2220046
The problem of determining the angle at which a point mass launched from ground level with a given speed is a standard exercise in mechanics. Similar, yet conceptually and calculationally more difficult problems have been suggested to improve student proficiency in projectile motion. The problem of determining the maximum distance of a rock thrown from a rotating arm motion is presented and analyzed in detail in this text. The calculational results confirm several conceptually derived conclusions regarding the initial throw position and provide some details on the angles and the way of throwing (underhand or overhand) which produce the maximum throw distance.Poljak, NikolaWed, 28 Sep 2016 06:02:02 GMT27 Sep 2016arXiv:1609.08468https://cds.cern.ch/record/2220046['arXiv:1609.08468']arXiv:1609.08468Control of Rayleigh-like waves in thick plate Willis metamaterials
https://cds.cern.ch/record/2220044
Recent advances in control of anthropic seismic sources in structured soil led us to explore interactions of elastic waves propagating in plates (with soil parameters) structured with concrete pillars buried in the soil. Pillars are $40$ m in depth and the plate is $100$ m in thickness, so that typical frequencies under study are in the frequency range 4 to 8 Hz, which is compatible with frequency ranges of particular interest in earthquake engineering. It is demonstrated in this paper that two seismic cloaks' configurations allow for an unprecedented flow of elastodynamic energy associated with Rayleigh surface waves. These designs are inspired by some ideal cloaks' parameters deduced from a geometric transform in the Navier equations that preserves the symmetry of the elasticity tensor but leads to Willis' equations as corroborated by numerical simulations. Importantly, we focus our attention on geometric transforms applied to thick plates, which is an intermediate case between thin plates and semi-infinite media, not studied previously. Cloaking effects (reduction of the disturbance of the wave wavefront and its amplitude behind an obstacle) and protection (reduction of the wave amplitude within the center of the cloak) are studied for ideal and approximated cloaks' parameters, the latter being based upon effective medium considerations. These results represent a first step towards designs of seismic cloaks for surface Rayleigh waves propagating in sedimentary soils structured with concrete pillars.Diatta, AndreAchaoui, YounesBrûlé, StéphaneEnoch, StefanGuenneau, SébastienWed, 28 Sep 2016 06:02:01 GMT24 Sep 2016arXiv:1609.08456https://cds.cern.ch/record/2220044['arXiv:1609.08456']arXiv:1609.08456Stochastic epidemic dynamics on extremely heterogeneous networks
https://cds.cern.ch/record/2220043
Networks of contacts capable of spreading infectious diseases are often observed to be highly heterogeneous, with the majority of individuals having fewer contacts than the mean, and a significant minority having relatively very many contacts. We derive a two-dimensional diffusion model for the full temporal behavior of the stochastic susceptible-infectious-recovered (SIR) model on such a network, by making use of a time-scale separation in the deterministic limit of the dynamics. This low-dimensional process is an accurate approximation to the full model in the limit of large populations, even for cases when the time-scale separation is not too pronounced, provided the maximum degree is not of the order of the population size.Parra-Rojas, CésarHouse, ThomasMcKane, Alan JWed, 28 Sep 2016 06:02:01 GMT27 Sep 2016arXiv:1609.08450https://cds.cern.ch/record/2220043['arXiv:1609.08450']arXiv:1609.08450Axiomatic, Parameterized, Off-Shell Quantum Field Theory
https://cds.cern.ch/record/2220042
Axiomatic QFT attempts to provide a rigorous mathematical foundation for QFT, and it is the basis for proving some important general results, such as the well-known spin-statistics theorem. Free-field QFT meets the axioms of axiomatic QFT, showing they are consistent. Nevertheless, even after more than 50 years, there is still no known non-trivial theory of quantum fields with interactions in four-dimensional Minkowski spacetime that meets the same axioms. This paper provides a similar axiomatic basis for parameterized QFT, in which an invariant, fifth path parameter is added to the usual four spacetime position arguments of quantum fields. Dynamic evolution is in terms of the path parameter rather than the frame-dependent time coordinate. Further, the states of the theory are allowed to be off shell. Particles are therefore fundamentally "virtual" during interaction but, in the appropriate non-interacting, large-time limit, they dynamically tend towards "physical", on-shell states. Unlike traditional QFT, it is possible to define a mathematically consistent interaction picture in parameterized QFT. This may be used to construct interacting fields that meet the same axioms as the corresponding free fields. One can then re-derive the Dyson series for scattering amplitudes, but without the mathematical inconsistency of traditional, perturbative QFT. The present work is limited to the case of scalar fields, and it does not address remaining issues of gauge symmetry and renormalization. Nevertheless, it still demonstrates that the parameterized formalism can provide a consistent foundation for the interpretation of QFT as used in practice and, perhaps, for better dealing with its further mathematical issues.Seidewitz, EdWed, 28 Sep 2016 06:02:01 GMT19 Sep 2016arXiv:1609.08448https://cds.cern.ch/record/2220042['arXiv:1609.08448']arXiv:1609.08448Radio lighting based on dynamic chaos generators
https://cds.cern.ch/record/2220041
A problem of lighting objects and surfaces with artificial sources of noncoherent microwave radiation with the aim to observe them using radiometric equipment is considered. Transmitters based on dynamic chaos generators are used as sources of noncoherent wideband microwave radiation. An experimental sample of such a device, i.e., a radio lighting lamp based on a chaos microgenerator and its performance are presented.Dmitriev, AlexanderEfremova, ElenaGerasimov, MarkItskov, VadimWed, 28 Sep 2016 06:02:01 GMT19 Sep 2016arXiv:1609.08444https://cds.cern.ch/record/2220041['arXiv:1609.08444']arXiv:1609.08444Quantum Mechanics and Common Sense
https://cds.cern.ch/record/2220040
A physical picture for Quantum Mechanics which permits to conciliate it with the usual common sense is proposed. The picture agrees with the canonical Copenhagen interpretation making more clear its statements.Gantsevich, S VWed, 28 Sep 2016 06:02:01 GMT19 Sep 2016arXiv:1609.08427https://cds.cern.ch/record/2220040['arXiv:1609.08427']arXiv:1609.08427Matter-Antimatter Propulsion via QFT Effects from Parallel Electric and Magnetic Fields
https://cds.cern.ch/record/2220039
Matter/antimatter (MAM) pair production from the vacuum through intense electric fields has been investigated theoretically for nearly a century. This history is reviewed and proposals of MAM for intra-solar system and interstellar propulsion systems are examined. The quantum mechanical foundation of MAM production was developed by MAM production occurs when the electric field strength is above the critical value at which the fields become non-linear with self-interactions (known as the Schwinger limit).MAM production occurs when the electric field strength is above the critical value at which the fields become non-linear with self-interactions (known as the Schwinger limit). As the energy density of lasers approach the critical strength of 10^16 V/cm, the feasibility and functionality of electron-positron pair production has received growing interest. Current laser intensities are approaching within 1 order of magnitude of the Schwinger limit. Processes for lowering the critical energy density below the Schwinger limit through additional quantum mechanical effects have been explored. One under study at the U. of Connecticut and the U. of Duisburg-Essen is pulsation of inhomogeneous electric fields within a carrier wave. Another is via enhancement of quantum effects by addition of a magnetic field parallel to the electric field. Magnetic field enhancement to quark/anti-quark production through chiral symmetry breaking effects in QCD was considered by J. Preskill in the 1980's. S. Pyo and D. Page showed in 2007 that parallel magnetic fields enhance electron/positron production via an analogous QED effect. MAM production as a highly efficient fuel source for intra solar system and interstellar propulsion was proposed by D. Crow in 1983. The viability of this method of propulsion will be studied, especially from the parallel electric and magnetic field approach.Cleaver, Gerald BWed, 28 Sep 2016 06:02:01 GMT13 Sep 2016arXiv:1609.08426https://cds.cern.ch/record/2220039['arXiv:1609.08426']arXiv:1609.08426