نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکدة فیزیک، دانشگاه تحصیلات تکمیلی علوم پایة زنجان، زنجان مرکز پژوهشی اپتیک، دانشگاه تحصیلات تکمیلی علوم پایة زنجان، زنجان
2 دانشکدة فیزیک، دانشگاه تحصیلات تکمیلی علوم پایة زنجان، زنجان
چکیده
در این پژوهش به مطالعة تونل‌زنی یک اتم در داخل یک چاه پتانسیل دوتایی پرداخته‌ایم. اتم در برهم‌کنش با یک یون است که در یک چاه هماهنگ ساده در مرکز چاه دوتایی قرار دارد. تونل‌زنی اتم را می‌توان با استفاده از اسپین و یا حالت‌های فضایی یون کنترل کرد. با در نظر گرفتن یک پتانسیل مدل نشان داده‌ایم که می‌توان یک حالت درهم‌تنیده بین حالت فضایی یون و تابع موج اتم تولید کرد. با استفاده از روش کنترل بهینه به بررسی سریع‌ترین فرایند ممکن برای دستیابی به این حالت درهم‌تنیده پرداخته‌ایم. این دستگاه می‌تواند به عنوان کیوبیت در کامپیوترهای کوانتومی مورد استفاده قرار گیرد.
کلیدواژه‌ها
عنوان مقاله [English]
Quantum speed limit in producing atom-ion entanglement in Josephson junction
نویسندگان [English]
- Sh Saeidian 1
- M Rajabi Ebgha 2
1 Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran. Optics Research Center, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
2 Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran.
چکیده [English]
In this work, we have studied the tunneling of a single atom in a double-well. The atom is interacting with a single ion in a simple harmonic trap placed in the center of the double-well. The tunneling of the atom is controlled by the spin and/or motional state of the ion. Considering a model potential, we have shown that it is possible to generate an entangled state between the spatial state of the ion and the atomic wavefunction. By employing the optimal control method, the quantum speed limit of generating this entangled process has been explored. This system can be used as qubit in quantum computers.
کلیدواژه‌ها [English]
- atom-ion entanglement
- chopped random basis algorithm
- optimal control
- quantum speed limit
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