作者: harryfish (harryfish) 看板: studyabroad 标题: [分享]Phone Interview with Oxford University- Physics 时间: Tue Feb 24 23:17:53 2009 我是申请 DPhil course at Atomic and Laser Physics, University of Oxford 有两场面试 提供给现在或是以後要申请的同学 问题非常专业,建议一定要熟读原子物理以及光谱 http://www.wretch.cc/blog/harryfish/10931582 精简版 (第一次口试 一位教授) 1. Why DPhil? (Dphil 等同於美国的PhD) 2. Future plan? 3. What courses did you take in your last year of college? 4. Have you taken Quantum Mechanics class before you went to U.S. as an exchange student? 5. What are other schools that you have applied to? 6. Research (以下是针对我的领域 基本知识以及研究细节的问题, 所以申请者应该不会被问到相同的,可以参考他问的详细程度) a. What is precession? b. Why would not spin align with the external field? c. What is magnetic angular momentum? d. What is the transition line for a Potassium atom? e. What is the mechanism for that transition? f. What are the mechanisms that you may think of for spin relaxation? g. What is the limitation for spatial resolution? What are factors responsible for it? h. How do you stable the power of laser? i. What is PID control? Do you know the limit for PID for which failed to catch up the fluctuation? What is the source of your noise? j. What kind of laser do you use in your experiment? k. What are the purposes for using an Electro-Optical crystal in your experiment? l. Explain your detection system. m. How do you increase the spatial resolution? .................................................................................................... My Questions (While Prof described his research) 1. What are the applications for your research? Significance? How do you increase S/N ratio and lower the effect of noise? 2. If admitted, any chance to get funding? Sourse of funding? (not from department, have to apply by individual) 3. Colleges in Oxford. 4. What other background do I need to prepare before entering a graduate school? 第二次口试 (两位教授) 1. what is spin? why are you interested in it? 2. How does spin apply on your research? 3. Explain your research. 我解释完後就开始问 我的的系统跟别的机制有何差别,为何我们敏感度较好? 为什麽不用一般的原理操作? 非线性光学有何特别? 有什麽系统可以比过我们? 那为什麽不用他们的机制作? (还有一推问题忘记了) 4. 他描述了一个HYPERFINE的光谱,给了excited state 的量子数,问所有可能的 TRANSITION以及MECHANICS电子耀迁後光子带的角动量是多少 (不同种TRANSITION会有不同种情形都要详速) 如何以数学式表示? quantum state 怎麽写 光子电子如何作用? 机制为合? (最後是要问quantum entanglement) 这题问了很久~"~ 5. 原子受激发後,除了spontaneous emission外,还会怎样? 如果一直激发原子,又会怎样?会一直被激发吗? 这题也问很久 一些问题我忘了sorry 6. Laser cooling (where is the force from?) 7. Quantum computation 8. Eeistein AB coeff 大概记得的是这样,第二场严肃很多 我完全没有预期会被问的这麽专业 而且因为这次秘书通知我时并不告知这两位教授的名称 我也无从由教授的领域准备 希望这次经验可以提醒大家 牛津面试不会因为是口述就不用专业问题 就算你研究领域做的跟他无关 他还是会问你懂多少(比方说 我做非线性光学 他问我量子资讯>"<) 而且它不像第一场的教授会给提示,通常只会说对与不对,没有对错的题目 通常就是看你能讲多少 希望後者可以有前车之监,多多看书,不要以为他只会跟你聊聊未来和你做的研究 广为涉略才比较有希望上 ps 三位中 某一位英国腔超重,加上不停lag的通话,让我费尽所有的力气去听问题 耳朵都快要年在电话上了 请接受英国面试前,先多听听bbc 大家加油吧 :) --

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