Phys.org July 30, 2024 Quantum systems of infinite dimension, such as bosonic oscillators, provide vast resources for quantum sensing. A general theory on how to manipulate such bosonic modes for sensing beyond parameter estimation is unknown. A team of researchers in the US (MIT, North Carolina State University) developed a general algorithmic framework, quantum signal processing interferometry (QSPI), for quantum sensing at the fundamental limits of quantum mechanics by generalizing Ramsey-type interferometry. The sensing protocol relied on performing nonlinear polynomial transformations on the oscillator’s quadrature operators by generalizing quantum signal processing (QSP) from qubits to hybrid qubit-oscillator systems. They used […]
Tag Archives: Quantum signal processing
Scientists tame photon-magnon interaction
Nanowerk January 14, 2021 Microwave photon-magnon interaction has emerged in recent years as a promising platform for both classical and quantum information processing. Yet, this interaction had proved impossible to manipulate in real time. By smart engineering, a team of researchers in the US (Argonne National Laboratory, University of Chicago) employed an electrical signal to periodically alter the magnon vibrational frequency and thereby inducing effective magnon-photon interaction resulting in a microwave-magnonic device with on-demand tunability. The device can control the strength of the photon-magnon interaction at any point as information is being transferred between photons and magnons. It can even […]