درهم‌تنیدگی دو اتم سه‌ترازی در یک کاواک در حضور واکوکی و اتلاف

نوع مقاله : پژوهشی

نویسندگان

1 دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته

2 دانشگاه ولی‌عصر(عج) رفسنجان

چکیده
در این مقاله برهم‌کنش بین دو اتم سه‌ترازی نوع و یک میدان تک‌مد، در حضور پارامترهای واکوکی و اثرات اتلافی مورد مطالعه قرار می‌گیرد. با درنظرگرفتن حالت اولیه سامانه (دو اتم در حالت برانگیخته و میدان در حالت همدوس)، بردار حالت سامانه در حالت تشدید و نبود اثرات اتلافی به‌ صورت تحلیلی، و در حالت غیرتشدید و حضور اثرات اتلافی به‌صورت عددی به ‌دست می‌آید. سپس، مقدار درهم‌تنیدگی بین دو اتم و میدان با استفاده از سنجه آنتروپی خطّی و بین دو اتم با استفاده از سنجه منفیّت مورد بررسی می‌شود. نتایج عددی نشان می‌دهند که رفتار سنجه‌های درهم‌تنیدگی به تنظیم پارامترهای سامانه وابسته بوده و با تغییر شرایط تشدید و شدّت اتلاف می‌توان بیشینه و ماندگاری آن‌ها را کنترل کرد.

کلیدواژه‌ها


عنوان مقاله English

Entanglement of two three-level atoms in a cavity in the presence of detuning and Dissipation

نویسندگان English

Mohammad Javad Faghihi 1
Mohammad Rahpeyma 1
Hamid Reza Baghshahi 2
1 Graduate University of Advanced Technolohy
2 Vali-e-Asr University of Rafsanjan
چکیده English

In this paper, the interaction between two Lambda-type three-level atoms and a single-mode field is investigated in the presence of detuning parameters and dissipation. Assuming that the two atoms are initially prepared in their excited states and the field is in a coherent state, the state vector of the total system is obtained analytically under resonance conditions in the absence of dissipation, and numerically under off-resonant conditions in the presence of dissipation. The entanglement between the atoms and the field is quantified using the linear entropy, while the entanglement between the two atoms is evaluated by means of the negativity measure. The numerical results show that the behavior of the entanglement measures strongly depends on the system parameters, and that both the maximum value and the persistence of entanglement can be controlled by adjusting the resonance conditions and the strength of dissipation.

کلیدواژه‌ها English

Three-level atom
Detuning parameter
Dissipation effect
Entanglement
Linear entropy
Negativity
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