درهم‌تنیدگی و فشردگی در حالت پایه در یک شبکة مربعی اسپینی در حضور میدان مغناطیسی

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

1 گروه شیمی، واحد امیدیه، دانشگاه آزاد اسلامی، امیدیه، ایران

2 گروه فیزیک، واحد امیدیه، دانشگاه آزاد اسلامی، امیدیه ، ایران

3 گروه فیزیک، واحد امیدیه، دانشگاه آزاد اسلامی، امیدیه، ایران

چکیده

در این پژوهش فشردگی اسپینی برای دو سیستم مربعی رایج، با پارامتر کیتاگاوا و برحسب متغیرهای سیستم، محاسبه شده و با درهم‌تنیدگی این سیستم‌ها برحسب دو سنجه میر-والاش و LE ، مقایسه شد. محاسبات نشان داد که در این سیستم‌ها رابطة مشخصی بین پارامتر کیتاگاوا و سنجه میر-والاش وجود دارد و در مواردی که فشردگی به‌میزان برهم‌کنش بین سایت‌ها وابسته است در همبستگی بین فشردگی و سنجة میر-والاش تغییری ایجاد نمی‌شود. همچنین هیچگونه همبستگی مابین میزان درهم‌تنیدگی برحسب سنجة LE و فشردگی در سیستم‌های مورد بررسی به‌دست نیامد. با این حال، در یکی از سیستم‌ها همبستگی ضعیفی بین آنها مشاهده شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Entanglement and squeezing of two-dimensional spin square lattice in ground state in a magnetic field

نویسندگان [English]

  • Noushin Zalaki Ghorbanpour 1
  • Abbaas Sabour 2
  • Fereydoon Khazali 1
  • Soghra GHanavati 3
1 Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.
2 Department of Physics, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.
3 Department of Physic, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.
چکیده [English]

In this study, spin squeezing was calculated for two common square systems in terms of the system variables using the Kitagawa parameter, and entanglement of these systems was compared based on the Meyer–Wallach and LE measures. Calculations showed a certain relationship between the Kitagawa parameter and the Meyer–Wallach measure in the two square systems. The correlation between squeezing and the Meyer–Wallach measure remains unchanged in cases where squeezing is dependent on the interaction between the sites. No correlation was found between entanglement in terms of the LE measure and squeezing in the studied systems. However, in one of the systems, a weak correlation between them was observed.

کلیدواژه‌ها [English]

  • Spin squeezing
  • Kitagawa parameter
  • Entanglement
  • LE measure
  • Square system
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