Christine Silberhorn

Abstract The two-qubit controlled-not (C-NOT) gate is an essential component for gate-based quantum circuits. In fact, its operation, combined with single qubit rotations allows to realise any quantum circuit. Several strategies have been adopted in order to build quantum gates. Among them, photonics offers the dual advantage of excellent isolation from the environment and ease of manipulation at the single qubit level.

Abstract Simulating vibronic spectra is a central task in physical chemistry, offering insight into important properties of molecules. Recently, it has been experimentally demonstrated that photonic platforms based on Gaussian boson sampling (GBS) are capable of performing these simulations. However, whether an actual GBS approach is required depends on the molecule under investigation.

Many emerging quantum technologies, which promise advances in fields like sensing, communication, or computation, rely on the use of so-called linear optical quantum networks (LOQNs). These networks allow us to harness the fundamental quantum properties of light (photons) by enabling the controlled interaction of many photons. Different properties of light can be used to encode information in such networks, for example, the location of a photon or the time at which it arises.