شبیه‌سازی چلاندگی خلأ در یک کاواک واهلشی دو فوتونی

صادقی, محمود

doi:10.22055/jrmbs.2021.16785

شبیه‌سازی چلاندگی خلأ در یک کاواک واهلشی دو فوتونی

نوع مقاله : مقاله پژوهشی کامل

نویسنده

محمود صادقی

گروه فیزیک،دانشکده علوم پایه، دانشگاه هرمزگان، بندرعباس، ایران

10.22055/jrmbs.2021.16785

چکیده

در این پژوهش فرایند تولید نور کوانتومی خلأ چلانده شبیه‌سازی شده است. به این منظور، از یک کاواک واهلشی تک مد با یک محیط غیرخطی با پذیرفتاری مرتبه دوم غیر صفر استفاده ‌شده است. محیط غیرخطی کاواک، با یک پمپ لیزر با فرکانس معین تحریک می‌شود و جفت فوتون‌های یکسان با فرکانس نصف لیزر محرک تولید می‌گردد. به این فرایند اصطلاحاً تبدیل نزولی پارامتری واگن می‌گویند. در غیاب هر نوع اتلافی، شبیه‌سازی، یک چلاندگی با پارامتر تابع خطی از زمان را به دست می‌دهد که با محاسبات تحلیلی کاملاً سازگار است. در حضور اتلاف دو فوتونی ناشی از تماس سیستم با یک محیط کاملاً سرد، شبیه‌سازی نشان می‌دهد که رقابت بین بهره حاصل از لیزر محرک و اتلاف دو فوتونی، منجر به چلاندگی پایدار برای خلأ اولیه در حالت پایای سیستم می‌گردد.

کلیدواژه‌ها

موضوعات

فیزیک اتمی-مولکولی

عنوان مقاله [English]

Vacuum squeezing simulation in two photon lossy cavity

نویسنده [English]

Mahmoud Sadeghi

Department of Physics, Faculty of Science, University of Hormozgan, Bandar-e-Abbas, Iran

چکیده [English]

In this research, squeeze vacuum state of quantum light is simulated. For this purpose, single mode dissipative cavity with non-zero second-order susceptibility is used. Cavity nonlinear medium is driving by laser pump with known frequency, and pairs of identical photons are created, with one-half frequency of driving pump. This process known as degenerate parametric down conversion. In the absence of any dissipation, simulation shows linear time dependent squeezing parameter, which is in agreement with theoretical results. In two photon loss of cavity in contact with cold reservoir, competition between gain and two photon loss, results in stable squeezing of initial vacuum, in steady state of system.

کلیدواژه‌ها [English]

Simulation
Squeezed vacuum
Optical parametric oscillator

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