Problem-specific Parameterized Quantum Circuits of the VQE Algorithm for Optimization Problems

The Variational Quantum Eigensolver (VQE) algorithm is attracting much attention to utilize current limited quantum devices. The VQE algorithm requires a quantum circuit with parameters, called a parameterized quantum circuit (PQC), to prepare a quantum state, and the quantum state is used to calculate the expectation value of a given Hamiltonian. Creating sophisticated PQCs is important from the perspective of the convergence speed. Thus, we propose problem-specific PQCs of the VQE algorithm for optimization problems. Our idea is to dynamically create a PQC that reflects the constraints of an optimization problem. With a problem-specific PQC, it is possible to reduce a search space by restricting unitary transformations in favor of the VQE algorithm. As a result, we can speed up the convergence of the VQE algorithm. Experimental results show that the convergence speed of the proposed PQCs is significantly faster than that of the state-of-the-art PQC

SOS Message Distribution for Searching Disaster Victims

This chapter presents the design and implementation of the SOSCast application which enables SOS message distribution for searching victims in a disaster-damaged area. During catastrophic disasters such an earthquake or tsunami, people may be injured or trapped in fallen buildings and debris. In situations like these, it is critical that rescue operations must be done within the first 72 h to save many lives. It is also during these events where communication infrastructures are severely damaged, and thus, makes it difficult for victims to ask for help due to the absence of communication channels. By using the SOSCast application in such scenario, victims are able to exchange SOS messages automatically by communicating directly among smartphones with less operation. By collecting these SOS messages, rescuers can find the existences of the victims as mapped on their smartphones. We have shown in our preliminary experiment within a residential area that SOSCast is capable of determining the existence of a propagator based on the collected SOS messages

Effect of single-dose extended-release oral azithromycin on anticoagulation status in warfarinized patients

Objective. The aim of this study was to investigate the possible influence of single-dose 2.0-g azithromycin (AZ-ER) on anticoagulation in patients taking warfarin. Study Design. Eighteen consecutive patients receiving long-term stable warfarin therapy were enrolled in this study. AZ-ER was administered 1 hour prior to tooth extraction. The international normalized ratio (INR) value was measured prior to AZ-ER administration as well as during, 1 day after, and 7 days after the tooth extraction. Additionally, the azithromycin concentration in the extraction wound as well as in the peripheral venous blood was assessed. Results. The changes in INR throughout the study period were not statistically significant (2-factor analysis of variance, NS). The azithromycin concentration in extraction wounds was higher than that in peripheral veins. Conclusions. The results of this study suggest that prophylactic administration of AZ-ER to patients receiving daily warfarin therapy with a stable coagulation status has no relevant effect on the anticoagulant effect of warfarin. (Oral Surg Oral Med Oral Pathol Oral Radiol 2013;115:148-151)ArticleORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY. 115(2):148-151 (2013)journal articl

Fluctuation properties of strength function associated with the giant quadrupole resonance in 208Pb

We performed fluctuation analysis by means of the local scaling dimension for the strength function of the isoscalar (IS) giant quadrupole resonance (GQR) in 208Pb where the strength function is obtained by the shell model calculation including 1p1h and 2p2h configurations. It is found that at almost all energy scales, fluctuation of the strength function obeys the Gaussian orthogonal ensemble (GOE) random matrix theory limit. This is contrasted with the results for the GQR in 40Ca, where at the intermediate energy scale about 1.7 MeV a deviation from the GOE limit was detected. It is found that the physical origin for this different behavior of the local scaling dimension is ascribed to the difference in the properties of the damping process.Comment: 10 pages, 14 figures, submitted to Physical Review