Research

Research Area: Algebraic Graph Theory with applications to quantum information and quantum computation. More specifically, quantum walks on graphs. Currently, we are investigating quantum state transfer in Grover walks on graphs. The Grover walk is a discrete-time quantum walk.

Supervisor: Prof. Bikash Bhattacharjya

Publications

1. Koushik Bhakta and Bikash Bhattacharjya, Periodicity and perfect state transfer of Grover walks on quadratic unitary Cayley graphs. Quantum Information Processing, 24:260, 2025. [arXiv] 

Preprints

2. Koushik Bhakta and Bikash Bhattacharjya. Grover walks on unitary Cayley graphs and integral regular graphs, 2024. [arXiv]

3. Koushik Bhakta and Bikash Bhattacharjya. State transfer in Grover walks on unitary and quadratic unitary Cayley graphs over finite commutative rings, 2025. [arXiv]

4. Koushik Bhakta and Bikash Bhattacharjya. Perfect state transfer in Grover walks on association schemes and distance-regular graphs, 2025. [arXiv]

5. Koushik Bhakta and Bikash Bhattacharjya. Pretty good state transfer in Grover walks on abelian Cayley graphs, 2025. [arXiv]