Yes, it is possible to pursue a Ph.D. in quantum computing even if your previous research field was computer vision. While it can be advantageous to have a background in a related field, such as physics or computer science, it is not always a strict requirement for entering a Ph.D. program in quantum computing.
Quantum computing is an interdisciplinary field that draws knowledge from various domains, including physics, mathematics, computer science, and engineering. Many universities and research institutions offer Ph.D. programs specifically in quantum computing or quantum information science, recognizing the diverse backgrounds of students interested in the field.
Having a Master's degree in computer vision can actually be beneficial for a Ph.D. in quantum computing. Quantum computing has connections to many areas of computer science, including algorithms, optimization, machine learning, and data analysis. Your expertise in computer vision may provide valuable insights and applications in quantum image processing, quantum pattern recognition, or other quantum-based approaches to computer vision tasks.
When applying for a Ph.D. program in quantum computing, make sure to highlight your research experience and explain how your knowledge and skills can be transferred and applied to the quantum computing domain. Additionally, consider reaching out to potential advisors or researchers in the field to discuss your interests and see if there are any research opportunities available that align with your background and goals.