Dynamics of the fractional quantum Hall edge probed by stroboscope measurements of trions

By using observations from pump-probe stroboscopic confocal microscopy and spectroscopy, we demonstrate the dynamics of trions and the fractional quantum Hall edge on the order of $\sim1$ ps. The propagation of the quantum Hall edge state excited by a voltage pulse is detected as a temporal change in reflectance in the downstream edge probed by optical pulses synchronized with the voltage pulse. The temporal resolution of such stroboscopic pump-probe measurements is as fast as the duration time of the probe pulse ($\sim1$ ps). This ultra-fast stroboscope measurement enables us to distinguish between the normal mode of edge excitation, known as the edge magneto-plasmon or charge density wave, and other high-energy non-linear excitations. This is the only experimental method available to study the ultra-fast dynamics of quantum Hall edges, and makes it possible to derive the metric tensor $g_{\mu \nu}$ of the $(1+1)=2$-dimensional curved spacetime in quantum universe and black hole analogs implemented in the quantum Hall edge

Optically monitored nuclear spin dynamics in individual GaAs quantum dots grown by droplet epitaxy

We report optical orientation experiments in individual, strain free GaAs quantum dots in AlGaAs grown by droplet epitaxy. Circularly polarized optical excitation yields strong circular polarization of the resulting photoluminescence at 4K. Optical injection of spin polarized electrons into a dot gives rise to dynamical nuclear polarization that considerably changes the exciton Zeeman splitting (Overhauser shift). We show that the created nuclear polarization is bistable and present a direct measurement of the build-up time of the nuclear polarization in a single GaAs dot in the order of one second.Comment: 7 pages, 3 figure

The Effect of Cranial Change on Oropharyngeal Airway and Breathing During Sleep

Mandibular micrognathia is one of the characteristics of obstructive sleep apnea syndrome. The purpose of this study was to assess the effects of bimaxillary surgery without maxillary advancement on the upper airway using computational fluid dynamics (CFD) results of comparing pre- and post-operative finite element model. Seven female patients with jaw deformity, who underwent two-jaw surgery (Le Fort1 osteotomy and bilateral sagittal split ramus osteotomy; BSSRO) were enrolled. Maxillary was moved for correcting occlusal plane and mandibular was moved to advancement. Pharyngeal airway space and breathing during sleep were evaluated, comparing the periods of 2 days before and 6 months after the operation. The cross-sectional area of the level of the hard palate (HP) and the level of the tip of the uvula (TU), and airway volume of total, HP-TU, and TP- the level of the base of the epiglottis (BE) were increased. AI and AHI in 2 days before and 6 months after were decreased. As the result of nasal ventilation condition, velocity of HP and TU in 2 days before and 6 months after were decreased. We think that it was revealed that movement of the maxilla without advancement did not affect to the morphology and function of airway

Effects of low-temperature capping on the optical properties of GaAs/AlGaAs quantum wells

We study the effects of low-temperature capping (200-450°C) on the optical properties of GaAs/AlGaAs quantum wells. Photoluminescence measurements clearly show the formation of abundant nonradiative recombination centers in an AlGaAs capping layer grown at 200°C, while there is a slight degradation of the optical quality in AlGaAs capping layers grown at temperatures above 350°C compared to that of a high-temperature capping layer. In addition, the optical quality can be restored by post-growth annealing without any structural change, except for the 200°C-capped sample

Photon correlation in GaAs self-assembled quantum dots

We report on photon coincidence measurement in a single GaAs self-assembled quantum dot (QD) using a pulsed excitation light source. At low excitation, when a neutral exciton line was present in the photoluminescence (PL) spectrum, we observed nearly perfect single photon emission from an isolated QD at 670 nm wavelength. For higher excitation, multiple PL lines appeared on the spectra, reflecting the formation of exciton complexes. Cross-correlation functions between these lines showed either bunching or antibunching behavior, depending on whether the relevant emission was from a biexciton cascade or a charged exciton recombination.Comment: 5 pages, 3 figure

ANALISIS PUTUSAN HAKIM NOMOR 41/PID.SUS/2018/PN BATU LICIN, TENTANG PERKARA SEDIAAN FARMASI OBAT DAFTAR G JENIS CARNOPEN YANG TIDAK MEMILIKI IJIN DITINJAU DARI ASPEK KEADILAN

The main task of the judge is to accept, examine and try and settle every case submitted to him. It seems very simple for the judge's duties as referred to in Article 2 paragraph 1 of Law Number 48 of 2009, but in reality it is not easy and that simple. The formulation of the problem in this study is 1) What is the Basic Consideration of Judge Judge Number 41 / Pid.Sus / 2018 / PN Batu Licin about the case of circulating pharmaceutical preparations for the list of G types of carnopen that do not have permission? 2) How is the Decision Number 41 / Pid.Sus / 2018 / PN Batu Licin concerning the case of circulating pharmaceutical preparations of the list of drugs G type carnopen that do not have permission in terms of aspects of justice? The approach used in this writing is normative juridical. The data used in this study are primary and secondary data. Analysis of legal materials used in this study is descriptive quality. The results of the analysis show that the basis for the Judgment of Judge Number 41 / Pid.Sus / 2018 / PN Batu Licin about the case of circulating pharmaceutical drug preparations list G types of carnopen which do not have permission, namely subjectively in this case, which is concerning a priori behavioral attitudes, behavioral attitudes emotional, arrogant and moral attitude. Objectively, that is regarding social, cultural and economic backgrounds, professionally. Decision Number 41 / Pid.Sus / 2018 / PN Batu Licin concerning cases circulating pharmaceutical preparations of the list of G types of carnopen which do not have permission in terms of justice, namely 1) declaring the aforementioned Defendant Candra Bin Rahmadi legally and convincingly guilty committing a criminal offense "intentionally circulating Pharmaceutical preparations that do not have marketing authorization" as in the primary indictment 2) Imposing a sentence to the Defendant because of that with imprisonment for 1 (one) year and 2 (two) months and a fine of Rp.2,000,000 00 (two million rupiahs) with the provision that if the fine is not paid is replaced by a confinement for 1 (one) month; and 3) Determine the period of arrest and detention that has been carried out by the Defendant entirely deducted from the sentence imposed