Journal of the Korean Physical Society最新文献_第4页

Effects of symmetry energy on the equation of state for hybrid neutron stars 对称能对混合中子星状态方程的影响

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-25 DOI: 10.1007/s40042-024-01148-x

Parada T. P. Hutauruk, Hana Gil, Seung-il Nam, Chang Ho Hyun

{"title":"Effects of symmetry energy on the equation of state for hybrid neutron stars","authors":"Parada T. P. Hutauruk, Hana Gil, Seung-il Nam, Chang Ho Hyun","doi":"10.1007/s40042-024-01148-x","DOIUrl":"https://doi.org/10.1007/s40042-024-01148-x","url":null,"abstract":"In this study, we explore the impact of symmetry energy on the transitions between hadron and quark phases within compact stars. We investigate the properties of potential configurations of quark-hadron hybrid stars using energy-density functional (EDF) models and the flavor SU(2) Nambu–Jona-Lasinio (NJL) model, employing Schwinger’s covariant proper-time regularization scheme. In this theoretical framework, we utilize equations of state (EoSs) of hadronic matter obtained from EDF models to describe the hadronic phase, and the flavor SU(2) NJL model with varying repulsive-vector interaction strengths represents the quark phase. By solving the Tolman–Oppenheimer–Volkoff equation, we examine the mass-radius properties of the hybrid star configurations for different vector interactions and nuclear symmetry energies. Our findings show that the critical density at which the phase transition occurs ranges from 3.6 to 6.7 times the normal nuclear-matter density, depending on the symmetry energy and the strength of the vector coupling ((G_v)). The value of (G_v) influences the maximum mass of the neutron star (NS). In the absence of a repulsive force, the maximum mass of the NS is only about 1.5 times the mass of the Sun ((M_odot)). Still, it exceeds 2.0(M_odot) when the vector coupling constant is approximately half of the attractive scalar coupling constant. Interestingly, quark matter does not impact the canonical mass of NS (1.4(M_odot)). Therefore, observing the canonical mass of NSs can provide valuable constraints on the EoS of hadronic matter at high densities.","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inter-layer coupling strength in lipid bilayer can control the size of lipid domains 脂质双分子层的层间耦合强度可控制脂质结构域的大小

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-25 DOI: 10.1007/s40042-024-01144-1

Kan Sornbundit

引用次数: 0

Suppression of external noise in on-chip photon-pair sources 抑制片上光子对源的外部噪声

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-24 DOI: 10.1007/s40042-024-01141-4

Woncheol Shin, Kiwon Kwon, Dongjin Lee, Heedeuk Shin

{"title":"Suppression of external noise in on-chip photon-pair sources","authors":"Woncheol Shin, Kiwon Kwon, Dongjin Lee, Heedeuk Shin","doi":"10.1007/s40042-024-01141-4","DOIUrl":"https://doi.org/10.1007/s40042-024-01141-4","url":null,"abstract":"Quantum photonic integrated circuits are ideal for photon-based complex quantum information systems due to their size, stability, and scalability. Photon-pair sources integrated into these circuits help reduce connection losses. These pairs are generated by pumping strong light through optical fibers into the chip, which can introduce unwanted noise photons, lowering the performance of quantum sources. Here, we studied photon pairs generated solely from on-chip sources to improve quantum photonic applications. External filtering often fails due to environmental influences, leading us to propose on-chip filters before and after photon-pair generation to mitigate external noise. We fabricated silicon waveguides with and without on-chip asymmetric Mach–Zehnder interferometer filters and analyzed photon pair properties through experiments. The results showed that on-chip filters effectively eliminate external noise, tripling the coincidence-to-accidental coincidence ratio. This suggests that on-chip filtering holds significant promise for enhancing quantum photonic applications like quantum communications and computations.","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

$$nu$$ Oscillation: a software package for computation and simulation of neutrino oscillation and detection $$nu$ 震荡：用于计算和模拟中微子震荡和探测的软件包

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-19 DOI: 10.1007/s40042-024-01120-9

Seunghyeok Jang, Eunil Won, Kyungmin Lee, Eunju Jeon, Young Ju Ko

引用次数: 0

Analysis of the effect of the chemical composition ratio of soil samples on pretreatment methods (direct method, AMP) and MDA 土壤样品化学成分比例对预处理方法（直接法、AMP）和 MDA 的影响分析

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-16 DOI: 10.1007/s40042-024-01118-3

Eun-Sung Jang

引用次数: 0

Initial image-based approach may enhance direct reciprocity for cooperation evolution 基于图像的初始方法可加强直接互惠，促进合作演化

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-16 DOI: 10.1007/s40042-024-01135-2

Sunhee Chae, Hyeong-Chai Jeong

引用次数: 0

Investigation of structural, dielectric and electrical properties of lead-free bismuth-based layered multifunctional material: CaBiGdNbVO9 for device fabrication 无铅铋基层状多功能材料的结构、介电和电气性能研究：用于器件制造的 CaBiGdNbVO9

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-11 DOI: 10.1007/s40042-024-01140-5

N. Kumar, S. S. Hota, D. Panda, S. K. Samal, R. N. P. Choudhary, U. Prasad

{"title":"Investigation of structural, dielectric and electrical properties of lead-free bismuth-based layered multifunctional material: CaBiGdNbVO9 for device fabrication","authors":"N. Kumar, S. S. Hota, D. Panda, S. K. Samal, R. N. P. Choudhary, U. Prasad","doi":"10.1007/s40042-024-01140-5","DOIUrl":"https://doi.org/10.1007/s40042-024-01140-5","url":null,"abstract":"The current study endeavors to fabricate a lead-free bismuth-based layered multifunctional material denoted as CaBiGdNbVO9 (CBGNVO), achieved through synthesis and characterization. X-ray diffraction analysis indicates a polycrystalline nature for the developed system, exhibiting orthorhombic crystal symmetry. Structural parameters obtained are a = 14.5781 Å, b = 27.3108 Å, c = 3.7148 Å, and V = 1479.01 Å3. Electron microscopic examination reveals compactness and uniform distribution of grains of similar sizes across the pellet sample surface. Electrical data analysis, encompassing relative permittivity, loss tangent, and impedance as functions of temperature and frequency, elucidates dielectric relaxation and conduction mechanisms within the material. These findings suggest the potential suitability for various applications, such as temperature sensors and bandwidth regulation. Examination of electronic charge carriers reveals a short-range order, validated through complex modulus and impedance spectrum analysis. A comprehensive investigation into resistive, capacitive, and microstructural characteristics provides valuable insights, positioning the material as a viable electronic component for device fabrication.","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum computation by cooling 通过冷却实现量子计算

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-09 DOI: 10.1007/s40042-024-01137-0

Jaeyoon Cho

{"title":"Quantum computation by cooling","authors":"Jaeyoon Cho","doi":"10.1007/s40042-024-01137-0","DOIUrl":"https://doi.org/10.1007/s40042-024-01137-0","url":null,"abstract":"Adiabatic quantum computation is a paradigmatic model aiming to solve a computational problem by finding the many-body ground state encapsulating the solution. However, its use of an adiabatic evolution depending on the spectral gap of an intricate many-body Hamiltonian makes its analysis daunting. While it is plausible to directly cool the final gapped system of the adiabatic evolution instead, the analysis of such a scheme on a general ground is missing. Here, we propose a specific Hamiltonian model for this purpose. The scheme is inspired by cavity cooling, involving the emulation of a zero-temperature reservoir. Repeated discarding of ancilla reservoir qubits extracts the entropy of the system, driving the system toward its ground state. At the same time, the measurement of the discarded qubits hints at the energy-level structure of the system as a return. We show that quantum computation based on this cooling procedure is equivalent in its computational power to the one based on quantum circuits. We then exemplify the scheme with a few illustrative use cases for combinatorial optimization problems. To circumvent the issue of local energy minima, we implant a mechanism in the Hamiltonian that allows the population trapped in the local minima to tunnel out via high-order transitions, and support the idea with numerical simulations. We also discuss its application to preparing quantum many-body ground states, arguing that the spectral gap is a crucial factor in determining the time scale of the cooling.","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the reproducibility and accuracy of DIBH with a laser distance sensor self-monitoring system in left breast cancer patients 利用激光测距传感器自我监测系统提高左侧乳腺癌患者 DIBH 的重现性和准确性

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-09 DOI: 10.1007/s40042-024-01138-z

Dong Woon Kim, Hosang Jeon, Yongkan Ki, Ji Hyeon Joo, Wontaek Kim, Donghyen Kim, Jiho Nam, Dahl Park

{"title":"Improving the reproducibility and accuracy of DIBH with a laser distance sensor self-monitoring system in left breast cancer patients","authors":"Dong Woon Kim, Hosang Jeon, Yongkan Ki, Ji Hyeon Joo, Wontaek Kim, Donghyen Kim, Jiho Nam, Dahl Park","doi":"10.1007/s40042-024-01138-z","DOIUrl":"https://doi.org/10.1007/s40042-024-01138-z","url":null,"abstract":"When adjuvant radiation therapy (RT) is employed following breast-conserving surgery (BCS), it is imperative to exercise caution regarding the risk of radiation exposure to the heart in patients diagnosed with left-sided breast cancer. Deep-inspiration breath-hold (DIBH) is a technique that regulates the patient’s breathing and expands the chest wall to increase the distance between the treatment area and surrounding organs, thereby providing protection for the heart. The self-monitoring system with a laser distance sensor (LDS) is not attached to the patient’s body and allows for the monitoring of respiration, thereby ensuring the reproducibility of DIBH. The experiment was conducted on 11 clinical left-sided breast cancer patients per group with or without self-monitoring. When self-monitoring was not performed, patients demonstrated a tendency to breathe regardless of the DIBH baseline, and there was no evidence of any tendency to correct errors. The mean distance error between the first and second DIBH was 3.78 mm and 3.95 mm, respectively, with an overall tendency for the average distance error to increase. When self-monitoring was performed, there was a tendency to correct errors according to the DIBH baseline. The average distance error between the first DIBH and the second DIBH was 2.02 mm and 1.98 mm, respectively, which was relatively small. The self-monitoring system with LDS helps to maintain the DIBH throughout the treatment period, thereby ensuring that treatment effects are consistent with the prescribed treatment plan can be expected. Furthermore, LDS, which can measure absolute distance, enhances the accuracy of patient positioning for DIBH.","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Continuous-time worm quantum Monte Carlo study of a two-dimensional spin-one XXZ model 二维自旋一 XXZ 模型的连续时间蠕虫量子蒙特卡洛研究

IF 0.6 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-07-05 DOI: 10.1007/s40042-024-01136-1

Ji-Woo Lee

引用次数: 0