Research project Dynamics of open and closed quantum systems
While entanglement is the primary threat of quantum mechanics, it is also the reason why simulating quantum systems by classical means is challenging. We explore complex quantum systems and explore methods for their simulation.
The dynamics of quantum systems are governed by a Hamiltonian. However, this ceases to be accurate when the system interacts with an environment or another system. In such cases, one grapples with open quantum systems, and alternative methods are needed. Within our research group, we investigate the characteristics of both intricate closed quantum systemsand open quantum systems. Our interests encompass entanglement spreading, equilibrium and non-equilibrium phase transitions, and quantum simulators. We employ a combination of theoretical and numerical tools, maintaining collaborative efforts with experimentalists.
Project description
We analyze a plethora of different quantum systems, with a significant focus on open quantum systems, elucidated within the framework of a Lindblad equation. Unlike the unitary time evolution governed by a Hamiltonian, the Lindblad equation describes the dynamics of a system weakly coupled to an environment. The conceptual distinction lies in the information loss from the system to its environment, rendering the accumulation of entanglement between the two. Our research delves into both stationary and dynamic properties, exploring how entanglement evolves and the role it plays in system properties. For closed quantum systems governed by a Hamiltonian, we scrutinize both few- and many-body systems. In few-body systems, our interest lies in the evolution of entanglement and the emulation of phenomena such as gauge fields. In many-body systems, we explore methods to realize exotic states of matter within the domain of "quantum simulators." Our investigations bridge theoretical frameworks and practical applications, advancing our comprehension of quantum phenomena.
Project members
Project managers
Jonas Ola Oscar Larson
Universitetslektor
Members
Caio Botelho Naves
Doktorand
