Quantum electron-photon coupling has emerged from two seemingly distinct interactions of free-electron beams with light: stimulated energy gain- and loss driven by strong lasers, and spontaneous radiative electron-energy loss.
Any quantum system is inherently open, continuously interacting with its environment. Therefore, effective manipulation of quantum devices must account for this reality. Control of open quantum systems is vital for advancing modern quantum science and technology.
Quantum information processing is reshaping both the theory and practice of computer science, with cryptography undergoing this transformation particularly intensely.
The interface between quantum computation and cryptography spans a broad and fascinating spectrum of questions.
Changing the properties of materials on demand is crucial both for understanding the conditions which allow for the appearance of emergent order and for generating new functionalities.
Magic state generation is a key ingredient in quantum computing, and until recently it was believed to consume a large amount of computational resources.
Blind quantum computing (BQC) allows a client to delegate quantum computations to a server while keeping both data and algorithms private.
However, practical BQC faces major challenges when scaling to fault-tolerant regimes due to losses, overhead, and limited client capabilities.
In this talk, I will present a beautiful—yet seemingly little-known—relation that expresses the SWAP operator in quantum mechanics as an average over Heisenberg-Weyl displacements.
This relation holds for qubits, qudits, and even continuous-variable systems in quantum optics.