arXiv abstract link

Atomtronics, a burgeoning field within quantum science and technology, involves the manipulation of ultracold atoms in matter wave circuits, allowing for precise control over a range of physical configurations. Atomtronic devices, such as the atomtronic quantum interference device (AQUID), emulate known electronic components like diodes, batteries, and transistors. Quantum superposition is a key component in atomtronics, used to create atomic qubits. Atomtronics has potential applications in emulating superconducting circuit elements. Research by H M Cataldo from the Universidad de Buenos Aires provides insights into the quantum features of stationary states, paving the way for the development and control of atomtronic devices.

Observation of both integer and, crucially, fractional Shapiro steps within Bose-Einstein condensates coupled to optical cavities presents a nondestructive protocol for real-time analysis of the AC and DC Josephson effects, potentially advancing atomtronics, precision sensing via superconducting quantum interference devices, and the development of Josephson qubits without compromising quantum state integrity.

Observation of both integer and, crucially, fractional Shapiro steps within Bose-Einstein condensates coupled to optical cavities presents a nondestructive protocol for real-time analysis of the AC and DC Josephson effects, potentially advancing atomtronics, precision sensing via superconducting quantum interference devices, and the development of Josephson qubits without compromising quantum state integrity.