Student Presenter(s): Gurpreet Singh, Thomas Cherry
Faculty Mentor: Yusui Chen
Department: Computer Science
School/College: School of Engineering and Computing Sciences, Long Island

As a unique quantum coherence, quantum entanglement between qubits can be used to transfer information and realize the potential of quantum computing. However, a qubit system cannot be ideally isolated from its surrounding environment, which refers to external factors such as radiation, photons, sound waves, mechanical vibrations, heat, and electromagnetic fields. The interactions between the qubit system and its environment reduce the entanglement inside the qubit system and turn it into the shared entanglement between the system and environment. Such a process is called quantum decoherence, which is viewed as a process of losing the information stored between two qubits. Our project focuses on the effects of the environment on the two-qubit system. Through the graphical analysis of the non-Markovian stochastic Schrodinger equations, we study the dynamics of the entanglement between two qubits and visualize the state of either qubit on the Bloch sphere. The study on the dynamics of entanglement can help better understand the quantum decoherence process and how to reduce and control the impact of decoherence in a real quantum device.