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Issue Info: 
  • Year: 

    2019
  • Volume: 

    9
  • Issue: 

    1
  • Pages: 

    192-198
Measures: 
  • Citations: 

    0
  • Views: 

    355
  • Downloads: 

    0
Abstract: 

In this paper, we investigate quantum renormalization group theory in transverse Ising model on one dimensional chain of spin-1/2 particles. To this end, we employ recursion relations to quantum renormalization of coherence measure at ground state. coherence measure diagram in terms of intensity of transverse field for higher renormalization steps shows the detection of quantum phase transition point for transverse Ising model which implies that the coherence measure can be a good indicator of quantum phase transition in transverse Ising model. Also, we obtain the divergence behavior that governs the first derivative of the coherence measure behavior, near to critical point. Although the coherence measure depends on the basis of writing the density matrix, results show that the quantum phase transition point detected by coherence measure is independent of selected basis.

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Author(s): 

KARAMI S. | Mortezapour a.

Issue Info: 
  • Year: 

    2019
  • Volume: 

    18
  • Issue: 

    4
  • Pages: 

    603-611
Measures: 
  • Citations: 

    0
  • Views: 

    871
  • Downloads: 

    0
Abstract: 

In this study, we consider a composed system consisting of two identical non-interacting subsystems. Each sub-system is made of a moving qubit into a leaky cavity. The study of the dynamic of the composed system revealed that compared with the stationary qubits, entanglement, quantum discord and coherence between two moving qubits remained close to their initial values as time went by. In particular, we show that the entanglement, quantum discord and the initial coherence between the two qubits could be strongly protected from decay by increasing the velocity of the qubits. Furthermore, based on such results, we have drawn a comparison between the three quantum resources (entanglement, quantum discord and coherence), demonstrating that the coherence of a bipartite system could be more robust than the two other quantum resources.

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    12
  • Issue: 

    2
  • Pages: 

    294-304
Measures: 
  • Citations: 

    0
  • Views: 

    92
  • Downloads: 

    0
Abstract: 

Currently, carbon quantum dots have attracted considerable attention due to their unique properties and desirable advantages. High crystallinity, water solubility, good dispersibility, small size, low toxicity, inexpensive raw materials, high chemical stability, environmental compatibility, low cost, stability under light, desirable charge transfer with advanced electronic conductivity, as well as specific thermal and mechanical properties are some of these features. Carbon quantum dots have various applications in different fields. Fabrication of precise chemical and biological sensors, bioimaging, solar cells, drug tracking, nanomedicine, light-emitting diodes (LEDs), and electrocatalysts are some of these applications. Biological sensors based on carbon quantum dots are capable of detecting various metal ions, acids, proteins, biotin, polypeptides, DNA and miRNA, water pollutants, hematin, drugs, vitamins, and other chemicals. In the present study, the properties of carbon quantum dots and some of their fabrication and applications methods have been addressed. In continuation of the paper, the effect of carbon quantum dots on important factors in plants such as growth and development, photosynthesis, absorption and transportation of substances, resistance to biotic and abiotic stresses, as well as their application in agriculture has been investigated.

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Issue Info: 
  • Year: 

    2024
  • Volume: 

    24
  • Issue: 

    2
  • Pages: 

    245-254
Measures: 
  • Citations: 

    0
  • Views: 

    14
  • Downloads: 

    0
Abstract: 

In this paper, the time evolution of quantum coherence and Hilbert-Schmidt speed, as a criterion to measure the memory of the quantum system, of a V-type three-level atom embedded in an anisotropic photonic crystal are investigated. The effect of the different relative positions of the upper levels from the forbidden gap and the initial relative phase values on the mentioned quantum features are studied. We show that the photonic band gap crystal, as a structured environment, significantly influences the preservation and enhancement of these quantum features. The photonic gap band materials have non-Markovian properties and offer a new approach as a basic solution in overcoming the decoherence problem and subsequently in problems related to quantum information.

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Author(s): 

Memarzadeh l.

Issue Info: 
  • Year: 

    2019
  • Volume: 

    19
  • Issue: 

    2
  • Pages: 

    405-413
Measures: 
  • Citations: 

    0
  • Views: 

    562
  • Downloads: 

    0
Abstract: 

We analyze the role of bath temperature, coherence and entanglement on excitation transfer in a spin chain induced by the environment. In Markovian regime, we show that coherence and entanglement are very sensitive to bath temperature and vanish in time in contrary to the case of having zero-temperature bath. That is while, finding the last qubit of the chain in excited state increases by increasing the bath temperature. The obtained results show the destructive role of temperature on coherence and entanglement and confirm that these quantum mechanical features cannot affect probability of finding the last qubit in excited state.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

Hosseiny S.M. | Kabi Milad

Journal: 

Optoelectronic

Issue Info: 
  • Year: 

    2023
  • Volume: 

    5
  • Issue: 

    1
  • Pages: 

    19-28
Measures: 
  • Citations: 

    0
  • Views: 

    87
  • Downloads: 

    16
Abstract: 

In this paper, we model an entangled system of two identical superconducting qubits in which Josephson junctions are coupled by a fixed capacitor. This coupling of the capacitor with Josephson junctions is added due to increase the coherence and neutralize the effects of decoherence in the system. To better understand the state of the system, using the theory of quantum computing, the qualitative behaviors of entanglement, coherence, and comparison between them are numerically investigated. It was observed that there is a limit for increasing the mutual coupling energy between two qubits, and beyond that, it will weaken the system performance. It was also seen that the behaviors of the entanglement and the coherence are almost similar and they can be maintained at high temperatures under some conditions. A remarkable point was is that, as the Josephson energy of the qubits increases, the coherence and entanglement increase even at high temperatures. Also, by increasing the mutual coupling energy between qubits, coherence and entanglement are maintained at high temperatures, which can be considered in the construction of entanglement sources. In addition, the difference between an identical and a dissimilar two-qubit system is also stated.

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Issue Info: 
  • Year: 

    2012
  • Volume: 

    6
  • Issue: 

    3 (22)
  • Pages: 

    1-7
Measures: 
  • Citations: 

    0
  • Views: 

    391
  • Downloads: 

    162
Abstract: 

The focus of this study is on developing a framework for a quantum Algorithm Processing Unit (QAPU) with the hybrid architecture for classical-quantum algorithms. The framework is used to increase the implementation performance of quantum algorithms and design quantum Processing Units (QPU). The framework shows a general plan for the architecture of quantum processors who is capable of run the quantum algorithms. In particular, the QAPU can be used as a quantum node to design a quantum multicomputer. At first, the hybrid architecture is designed for the quantum algorithms. Then, the relationship between the classical and the quantum part of hybrid algorithms is extracted, and main stages of the hybrid algorithm are developed. Next, the framework of the QAPU is designed.Furthermore, the framework is implemented and simulated for the existing quantum algorithms on a classic computer.It is shown that the framework is appropriate for quantum algorithms.

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Issue Info: 
  • Year: 

    1386
  • Volume: 

    14
Measures: 
  • Views: 

    2314
  • Downloads: 

    0
Abstract: 

الکتروانسفالوگرام (EEG) یکی از ابزارهای اساسی در ارزیابی و شناسایی اختلالات نروفیزیولوژیک است. اوتیسم از جمله بیماریهای نافذ (EEG) الکتروانسفالوگرام رشد در دوران کودکی است که در ارتباطات، درک و شناخت کودک اختلال ایجاد می کند. در این تحقیق از طیف اسپکتوگرام (مولفه های فرکانسی زمان کوتاه STFT) جهت تفکیک کودکان اوتیسم (15 نفر در محدوده سنی 6 تا 11 سال) از کودکان سالم (9 نفر در همان محدوده سنی) استفاده شده است. آنالیزها در پنج باند فرکانسی دلتا (0-4 هرتز)، تتا (4-8 هرتز)، آلفا (8-12 هرتز)، بتا (14-34 هرتز) و گاما (34-44 هرتز) بین دو گروه مقایسه شده اند. نتایج نشان داده اند که پروتکل ثبت سیگنال همراه با نشان دادن تصویر غریبه به صورت وارونه در باندهای فرکانسی بتا، آلفا و گاما به ترتیب 83.3%، 77.3% و 72.7% جداسازی دو گروه را در پی داشته است. از آنجا که باند بتا انعکاس دهنده فعالیت کانالهای همسایه می باشد، در این باند فرکانسی با استفاده از تابع شباهت همدوسی (coherence) تعامل کانالهای همسایه (112 زوج کانال) ارزیابی شده است. نتایج نشان داده است که بیشتر نابهنجاری ها در کودکان اوتیسم مربوط به نواحی لوب پیشانی و آهیانه ای و ارتباط این نواحی با ناحیه لوب مرکزی است.

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Author(s): 

Mobarak Vahid | Sahami Ali

Issue Info: 
  • Year: 

    2025
  • Volume: 

    6
  • Issue: 

    1
  • Pages: 

    115-136
Measures: 
  • Citations: 

    0
  • Views: 

    21
  • Downloads: 

    0
Abstract: 

One of the issues that text analysts pay attention to is text coherence. Halidi is one of the linguists who, in addition to paying attention to the semantics and context of the situation and functions of the text, has also paid attention to the coherence of the text. In this descriptive-analytical article based on Halidi's role-oriented theory, the factors of text cohesion have been evaluated in two Masnavi stories, and the authors in this essay aim to show Maulavi's Masnavi, linguistic abilities and grammatical coherence. , has a proper vocabulary and connection, and this theory can be used to determine the degree of coherence and coherence in the texts of narrative order. The findings of Ashagh and Beloved story show that most of the processes are material and omission and reference prevail in grammatical coherence and repetition in lexical coherence and causal relationship prevail in the linking coherence of this text; But in the story of the grocer and the parrot, it is dominated by mental and then material processes, and substitution, removal, and reference from grammatical coherence factors play an important role in creating space and building the vertical axis. Coincidence and repetition are not very evident, but the opposite, causal and time links are used with full force. The discourses of the supremacy of love and the inability of reason have made both texts more coherent, which is consistent with the entirety of the Masnavi.  Introduction: One of the issues that text analysts pay attention to is text coherence. Halidi is one of the linguists who, in addition to paying attention to the semantics and context of the situation and the functions of the text, has also paid attention to the coherence of the text. In this descriptive-analytical article based on Halliday's role-oriented theory, the factors of text cohesion in two short stories "Asheq and Beloved"; Baggal and Tuti" of Masnavi has been evaluated and the author in this essay aims to show that Masnavi has spiritual, linguistic abilities and grammatical, lexical and link coherence and this theory can be used for Determining the degree of coherence and coordination of coherence was used in the texts of narrative order.  One of the important theories of linguistics, which can lead the way in the analysis of literary texts, is the theory of Michael Halliday and Roqayeh Hassan. The two worked together in 1976 to create the book "Cohesion in the English Language". Halliday's role-oriented order explains how language is used and the basic components of meaning in it are functional components. According to this order, all languages are organized around two types of meaning or role: meanings. Intellectual and interpersonal. In combination with these two, there is a third component called intertextual trans-role, which organizes the message based on the previous two trans-functions and conveys it to others; So, systematic role-oriented instruction is a role-oriented theory of language that studies language in the form of its functions and roles in human life. (Ref: Halidi and Matiesen, 2004: 60; Halidi and Hassan, 2013: 87; Yaramhammadi, 2014: 56). One part of this theory is called coherence factors, which considers the coherence or continuity of sentences as the product of the relationship between sentence and clause components. This communication is formed at the phonetic, semantic, syntactic and logical level of the language.  If the components of the written or spoken sentences are related and coherent, that written or spoken word forms a text. The textual function of the word is based on the arrangement and order of the content elements of the word. In the textual structure of the paragraph, it is divided into two distinct constructions, "initiative and news" and "informational" and a non-structural part, namely "coherence". coherence is "a means to connect elements that are structurally unrelated, which is made possible by making use of interdependence to explain and interpret one element based on another element" (Zia Hosseini, 2011: 5).  Halidi and Hassan have defined coherence as follows: "coherence is a semantic concept that refers to the semantic relationships in the text and distinguishes it as a text from non-text" (Halidi, 1976: quoted by Sarli, 2011:55). Materials and Methods: Based on the searches that have been carried out, a research with the title of the present article, text coherence in two Masnavi stories, has not been done, but in the field of the coherence of the Persian language, theses and articles have been written in the general form, mostly in the field of linguistics. Is. Some of these studies are: -Vocabulary coherence in the Qur'an, examination of Surah Noor based on the theory of Halidi and Hassan, master's thesis, by Hossein Rajabi (2006), Razi University, Kermanshah. -Essay on "Theory of cohesion and cohesive coordination and its application in a story (the story of the ladder)" by Naser Qoli Sarli and Tahereh Ishani in Al-Zahra University Language Research Quarterly (S) number 4, spring and summer 2019. The authors of this article intend to investigate the factors of text cohesion in two stories from Masnavi based on Halidi's role-oriented linguistic theory and answer the following questions: What factors have caused grammatical, lexical and connectional coherence in Molvi's poetry? According to the factors of cohesion (Halidi's point of view), how can it be claimed that Molavi's poetry is coherent? Cohesion tools coherence refers to the semantic relations that exist between the elements of a text, and through their action, the interpretation of some elements of the text becomes possible. In his numerous works amongst in his book "Introduction to Role-Oriented Instruction" (1985), Halidi assigns three major roles to language: 1- The function of thought, in which a person expresses his experience and feelings from the outside world. 2-Intermediate function in which the speaker or writer uses a theorem to communicate with others 3- Text function in which the speaker or writer conveys a message that is based on the previous two functions in spoken or written form (or possible form) others) organizes and conveys to others. (Yarmohammadi), 2004:56. Role-oriented grammar and text analysis, the tools and factors of text cohesion are first divided into three general groups: grammatical cohesion (reference, substitution, deletion), lexical cohesion (repetition, similarity) and relational cohesion (addition, causation, contrast, time) they divide. Of course, what establishes coherence in the sentence is "knot", the knot connects one element of one sentence to another element in another sentence. The knot is created by being the same reference, being the same class, being the same extent. The role of language thinkers Since language is a means of representing the world outside and inside a person, the experiences and images that we have of the continuity of the world around us and our mental and imaginary world are categorized and become concepts through language, and coding and are expressed The intellectual role of language is related to the processes, participants of the process and surrounding elements of the process, and the processes are divided into the main processes (material, mental and relational) and sub-processes (verbal and existential behavior). In order to show coherence and coherence, first the text was divided into clauses (sentences), then among the written words, lexical coherence factors (repetition, semantic synonyms, semantic inclusion - part and whole), and grammar (reference), deletion, replacement, relational factors) were found, then the words in each paragraph were written separately, without considering conjunctions and additions, etc., and then the coherence of the text was calculated. (Ref: Yarmohammadi, 1389: 40). Results and Discussion: Said a lover to a lover O young man  You have seen so journ in the cities So which city is better than them? He said: The city in which he loves (Molavi, 2010, Vol. 3: 976). In the analysis and examination of the coherence and cohesiveness of this poem poem of Molavi's Masnavi, because the question and answer are repeated with the verb "said" and the characters of the lover and the lover are the speaker and the audience who are present in this verbal process and have been questioned and answered. In the first three stanzas of the poem, it is the speaker (beloved) who ends the narrative with the "said" plot in such a way that the reader or the recipient of the text is convinced of the existence of a different incident and conflict in the lover's mind. Of course, the practical function of the lover in searching the cities to find the superior lover is the correcting support of this mental function of the lover, because the lover confirms the first function and his attachment to the beloved by his return. The lover's response to the beloved shows that after all the difficulties, his attachment to her was the best way and the best thought, which is emphasized by the final sentence indicating the presence of the beloved. In other words, the lover transfers goodness to something beyond himself, but this confused lover returns to the first point, which is the lover and his goodness, after completing a complete cycle. Beloved can be the first and the last, and in this way it establishes the semantic coherence of the text. He was a grocer and he was a parrot with a good voice. Verbs are the central core of every sentence and speech, therefore their investigation can reflect the intellectual aspect and attitude of the writer and poet. Language is a means of representing the world outside and inside a person, and the poet's language represents his thought and worldview. Masnavi also reflects Molavi's attitude. Every part of Molavi's speech is a speech interwoven and mixed with narrative narration and expression of mystical or philosophical thought, etc. Examining the processes used in the story of Baggal and Toti of the first book of the Masnavi, which reveals the overall construction of this text and most stories of the Masnavi, shows that this story uses existential verbs such as Baggal and. ..it begins and then continues with verbal and material processes that indicate conversation and doing work (action) and is connected to behavioral and material processes to express the spiritual and spiritual conditions of the characters in the story. and when Molavi expresses his lofty thoughts or expresses the principles and rules of life and collective life, the language tends towards the use of mental processes, and as Molavi's goal is to teach this part of his statements to the audience and Disciples is the application of processes, due to the repetition and reference or the need for a lot of explanation, it reaches its peak and it includes a wide part of the teaching and ijtihad thoughts of Molavi, and therefore, the reign and dominance of the mental aspect. The processes of the text are evident on other verbs; Although material processes are used more than all processes in the narrative parts of the story due to the advancement of the story and story action, so that the realism and naturalness of the story can be maintained and the poet can successfully project his ideas. Based on allegorical reasoning and similarity scale. Masnavi is a book of thought, not a book of stories and narratives, and just as the plot of God's book has a practical and instrumental aspect, not a purposeful aspect, in Masnavi, this style of the heavenly book has been exploited by Molavi. In a better way, it can be said that secondary processes (behavioral, verbal, and existential) have become tools and precursors to express the main processes (mental, etc). The participants of this story are Tuti, Jolagi, Baggal, and Khalq, and among the surrounding elements of the process is the atmosphere of mockery, laughter, and humiliation that the people give to Tuti. Conclusion: It should be said that these two poems of Molana's Masnavi are coherent and in them, grammatical coherence prevails over lexical coherence. Most examples of grammatical coherence of both texts are related to deletion and substitution, and the frequency of verb repetition is the most important factor of lexical coherence. Of course, there is a complementary relationship between lexical coherence and grammatical coherence, and in addition to the temporal relation, causal and consequential conjunction also governs both texts. In the intellectual aspect, the participants of these two stories are the lover and the beloved, and Tuti, Jolagi, Baggal, and Khalq, and the sincerity of the lover and the importance of living in the lovely city, and the atmosphere of mockery, laughter, and contempt that the people give to Tuti are among the elements. The periphery of these two texts are considered. In the story of a lover, the dialogue process plays the main role and includes the centrality of the beloved, and questions and answers about it; But the processes used in the story of the parrot begin with the process of using existential verbs such as was grocery store... and then continue with verbal and material processes that imply conversation and doing work Behavioral and material are connected to express the condition of the characters in the story, and when Molavi expresses his lofty thoughts in the middle of the story in the usual way, the language tends towards the use of mental processes and as the goal Molvi is teaching the students mystical points. The predominance of the use of mental processes over other verbs is evident so that the singer can successfully project his mystical thoughts based on allegorical reasoning. Although the material processes are not few due to the advancement of the story and story action and maintaining the realism and naturalization of the story. From the sum of the non-structural coherences of the text, the semantic connections of the lover and the beloved; Conversation; giving orders and obeying; Men and women; place and taker of place (grocery and shop) has been mentioned. It seems that the theory of coherent coordination can be used in Persian texts and this model can be used in the analysis of literary texts.

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Journal: 

Research in Medicine

Issue Info: 
  • Year: 

    2006
  • Volume: 

    30
  • Issue: 

    1
  • Pages: 

    73-79
Measures: 
  • Citations: 

    0
  • Views: 

    3485
  • Downloads: 

    0
Abstract: 

quantum medicine is an emerging technology in medical sciences also called alternative and complementary medicine, takes advantage from low dose electromagnetic fields interaction with body organs. The main base of this specialty is originated from this fact that human body itself consists of electromagnetic fields flow inside and outside of the body that play an important role in physical, chemical and mental changes. These are the fundamentals of new medical technologies employed in medicine to diagnose and cure disorders and diseases. This article reviews the principles of quantum medicine and devices recently invented in this field.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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