Search results for "AMPs"
showing 10 items of 227 documents
Evidence for the two pole structure of the Lambda(1405) resonance
2005
The K^- p --> pi^0 pi^0 Sigma^0 reaction is studied within a chiral unitary model. The distribution of pi^0 Sigma^0 states forming the Lambda(1405) shows, in agreement with a recent experiment, a peak at 1420 MeV and a relatively narrow width of Gamma = 38 MeV. The mechanism for the reaction is largely dominated by the emission of a pi^0 prior to the K^- p interaction leading to the Lambda(1405). This ensures the coupling of the Lambda(1405) to the K^- p channel, thus maximizing the contribution of the second state found in chiral unitary theories, which is narrow and of higher energy than the nominal Lambda(1405). This is unlike the pi^- p --> K^0 ��Sigma reaction, which gives more w…
Nonadiabatic quantum search algorithms
2007
7 pages, 4 figures.-- PACS nrs.: 03.67.Lx, 05.45.Mt, 72.15.Rn.-- ISI Article Identifier: 000251326400049.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.1139
Quantum walk with a time-dependent coin
2006
We introduce quantum walks with a time-dependent coin, and show how they include, as a particular case, the generalized quantum walk recently studied by Wojcik et al. {[}Phys. Rev. Lett. \textbf{93}, 180601(2004){]} which exhibits interesting dynamical localization and quasiperiodic dynamics. Our proposal allows for a much easier implementation of this particular rich dynamics than the original one. Moreover, it allows for an additional control on the walk, which can be used to compensate for phases appearing due to external interactions. To illustrate its feasibility, we discuss an example using an optical cavity. We also derive an approximated solution in the continuous limit (long--wavel…
Simulation of many-qubit quantum computation with matrix product states
2006
Matrix product states provide a natural entanglement basis to represent a quantum register and operate quantum gates on it. This scheme can be materialized to simulate a quantum adiabatic algorithm solving hard instances of a NP-Complete problem. Errors inherent to truncations of the exact action of interacting gates are controlled by the size of the matrices in the representation. The property of finding the right solution for an instance and the expected value of the energy are found to be remarkably robust against these errors. As a symbolic example, we simulate the algorithm solving a 100-qubit hard instance, that is, finding the correct product state out of ~ 10^30 possibilities. Accum…
Information encoding of a qubit into a multilevel environment
2010
I consider the interaction of a small quantum system (a qubit) with a structured environment consisting of many levels. The qubit will experience a decoherence process, which implies that part of its initial information will be encoded into correlations between system and environment. I investigate how this information is distributed on a given subset of levels as a function of its size, using the mutual information between both entities, in the spirit of the partial-information plots studied by Zurek and co-workers. In this case we can observe some differences, which arise from the fact that I am partitioning just one quantum system and not a collection of them. However, some similar featu…
Prenatal Clinical Assessment of sFlt-1 (Soluble fms-like Tyrosine Kinase-1)/PlGF (Placental Growth Factor) Ratio as a Diagnostic Tool for Preeclampsi…
2013
Background: Aim of the study was a critical assessment of the clinical validity of the prenatal determination of sFlt-1/PlGF for preeclampsia (PE), pregnancy-induced hypertension (PIH), and proteinuria. Our analysis was based on a specificity of 95 % and a sensitivity of 82 % for the prediction of preeclampsia, as described by Elecsys (Roche). Methods: In this retrospective study the ratio of the prenatal antiangiogenic factor sFlt-1 (soluble fms-like tyrosine kinase-1) to the proangiogenic factor PIGF (placental growth factor) was analyzed using the electrochemiluminescence immunoassay of Elecsys (Roche Diagnostics, Mannheim, Germany) in 173 pregnant women. Sixty-three women with PE, 34 wo…
Responding to the Nazi Crimes: The British Press and the Nuremberg Trial
2011
Ever since the news of the liberated concentration camps had filled the pages of British newspapers, the majority attitude of the press was that Nazi criminality, including the Final Solution, had to be recorded and remembered. Throughout the summer of 1945, the victorious Allies were wrestling with the question of how the unbelievable scenes, exposed by advancing Allied armies who liberated concentration camps, and the criminality of the Nazi regime that had made them possible, should be investigated.
Transatlantiskās tirdzniecības un investīciju partnerības (TTIP) līguma apturēšana. Demokrātu un Republikāņu politisko partiju nostādņu analīze
2017
Tēma: Transatlantiskās tirdzniecības un investīciju partnerības (TTIP) līguma apturēšana. Demokrātu un Republikāņu politisko partiju nostādņu analīze. Lai arī agrāk Republikāņu politiskā partija atbalstīja brīvo tirdzniecību, Donalds Tramps, kļūstot par ASV prezidentu, ir apturējis brīvās tirdzniecības līgumus starp ASV un citām partnervalstīm. Darba mērķis ir noskaidrot iemeslu TTIP līguma apturēšanai no ASV puses, par teorētisko pamatu ņemot politisko partiju ideoloģiskās pārkārtošanās teoriju. Rezultāts – politisko partiju ideoloģiskās pārkārtošanās rezultātā ASV Republikāņu politiskā partija ir kļuvusi par partiju, kas neatbalsta brīvo tirdzniecību.
Epidemiology of preeclampsia in a Sicilian Hospital
2016
Multivariate logistic regression has shown that the following variables are independent risk factors for preeclampsia: age, BMI, parity, and twin pregnancy. Moreover, preeclampsia is significantly associated with the examined clinical effects, confirming itself as a leading cause of maternal-fetal morbidity.
Status epilepticus in der Spätschwangerschaft - Eklampsie oder Subarachnoidalblutung?
1997
After a largely inconspicuous pregnancy, a 31-year old primipara suffered from a status epilepticus in the third trimenon. The convulsions could not be terminated by emergency medical services, resulting in aspiration of gastric contents. Assuming eclampsia, an emergency caesarean section was performed immediately in a central hospital. Postoperatively, a pathological pattern of tendon reflexes was noticed. A CT scan revealed subarachnoid haemorrhage. The causal aneurysm of the right A. pericallosa was clipped subsequently. Eclampsia is the leading cause of epileptic seizures during pregnancy. However, a different aetiology should always be considered, especially if medical history does not…