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آنتروپی و اثرات واهمدوسی در رادار چلانده دو مدی کوانتومی | ||
| فصلنامه علمی اپتوالکترونیک | ||
| دوره 5، شماره 1 - شماره پیاپی 12، اسفند 1401، صفحه 9-18 اصل مقاله (865.75 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.30473/jphys.2023.66281.1129 | ||
| نویسندگان | ||
| جمیله سیدیزدی* 1؛ سید محمد حسینی2؛ میلاد نوروزی3؛ فاطمه ایران نژاد4 | ||
| 1'گروه فیزیک، دانشکده علوم پایه، دانشگاه ولی عصر (عج) رفسنجان | ||
| 2دانشگاه ارومیه | ||
| 3گروه فیزیک، دانشکده علوم، دانشگاه ولی عصر (عج) رفسنجان | ||
| 4دانشگاه ولی عصر (عج) رفسنجان | ||
| چکیده | ||
| در این کار، برای اولین بار به محاسبه و بررسیِ رفتار کیفیِ آنتروپی و اثرات واهمدوسی در رادار چلانده دومدی کوانتومی زمانی‌که هدف حضور دارد و سیگنال تولید شده به سمت هدف ارسال می‌شود، پرداخته می‌شود. به طور کلی، واهمدوسی با کاهش خلوص حالت سامانه، یعنی انتقال از حالت خالص به حالت آمیخته همراه است. علاوه بر این با بررسی آنتروپی، درهم‌تنیدگی سامانه را برای تعداد مؤثر فوتون‌ها در ورودی آشکارساز بررسی می‌کنیم. افزون بر این، شرایط مختلف مؤثر بر بهبود عملکرد یک آشکارساز کوانتومی در رادار چلانده دو مدی کوانتومی مورد ارزیابی قرار می‌گیرد. حالت کوانتومی سامانه از حالت همدوس با افزایش دما و پارامتر چلاندگی (در دماهای بالا) به حالت ناهمدوس تبدیل می‌شود. اثرات واهمدوسی با پارامتر چلاندگی و توان سیگنال نسبت عکس دارد. نسبت فوتون‌های دریافتی در گیرنده با پارامتر چلاندگی و توان سیگنال نسبت مستقیم دارد. افزایش نسبت فوتون‌های دریافتی در گیرنده، هم آنتروپی سامانه را افزایش می‌دهد و هم اثرات واهمدوسی سامانه را کاهش می‌دهد که نتیجه بسیار مهمی است. علاوه بر این، رفتارهای کیفیِ آنتروپی و خلوص کاملاً مشابه هستند. | ||
| کلیدواژه‌ها | ||
| رادار کوانتومی؛ برتابش کوانتومی؛ خلوص؛ رادار چلانیده دومدی کوانتومی؛ آنتروپی | ||
| عنوان مقاله [English] | ||
| Formation Entropy and Decoherence Effects in Quantum Two-Mode Squeezed Radar | ||
| نویسندگان [English] | ||
| Jamileh Seyedyazdi1؛ Seyed Mohammad Hosseiny2؛ Milad Norouzi3؛ Fatemeh Irannezhad4 | ||
| 1Physics Department Faculty of Science Vali-e-Asr University of Rafsanjan | ||
| 2Urmia University | ||
| 3Vali-e-Asr University of Rafsanjan | ||
| 4Vali-e-Asr University of Rafsanjan | ||
| چکیده [English] | ||
| In this study, for the first time, the calculation and investigation of the qualitative behaviors of entropy and decoherence effects in quantum two-mode squeezed (QTMS) radar when the target is present and the generated signal is transmitted to the target is discussed. In general, incoherence is associated with a decrease in the purity of the state of the system, that is, the transition from a pure state to a mixed state. Additionally, by examining the entropy, we examine the entanglement of the system for the effective number of photons at the detector input. In addition, various conditions affecting the performance improvement of a quantum detector in QTMS radar are evaluated. The quantum state of the system changes from the coherent state to the incoherent state with the increase of temperature and squeezing parameter (at high temperatures). The decoherence effects are inversely proportional to the squeezing parameter and signal power. The ratio of received photons in the receiver is directly proportional to the squeezing parameter and signal power. Increasing the ratio of received photons in the receiver increases the entropy of the system and reduces the decoherence effects of the system, which is a very important result. Moreover, the qualitative behaviors of entropy and purity are quite similar. | ||
| کلیدواژه‌ها [English] | ||
| Quantum Radar, Quantum Illumination, Purity, Quantum Two-Mode Squeezed Radar, Formation Entropy | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 1,057 تعداد دریافت فایل اصل مقاله: 430 |
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