Hello

Yes you can .If you would like to try and do it in India you would like to qualify GATE with good score and a guide(mentor) who will accept you after some set of interviews .

In other countries you would like to satisfy their criterias. But it's generally dependents on the institute and guide .The requirements would generally include certain calculus based physics courses, mathematics courses, etc. you would also have to meet minimum grade point average (CGPA) requirements.Also the necessities vary from university to university .

Hope this helps.