Summary
Developing hybrid quantum systems is essential to harnessing the complementary advantages of different quantum technology platforms. This necessitates the successful transfer of quantum information between platforms, which can be achieved, e.g., by harnessing magnons, or spin wave excitations, in magnetic materials. Decoherence due to uncontrolled coupling of qubits to the environment remains a fundamental challenge in many current platforms but can be potentially overcome by harnessing magnon Bose-Einstein condensates (BECs) and non-Abelian Majorana fermion excitations that arise from a Kitaev quantum spin liquid (QSL). The goals of this project are (1) to generate and detect coherent magnons in 2D magnets for quantum magnonics; and (2) to induce collective quantum states in 2D magnets (magnon BECs and Kitaev QSLs), which can provide an alternative route to defeat quantum decoherence. 2D magnetic insulators interfaced with topological semimetals will be fabricated to generate and detect coherent magnons, magnon BECs and QSLs. Radio-frequency (RF) current driven through the metallic layers will yield a spin and/or anomalous Hall current that will exert torques and excite spin waves in the magnetic layers. The excited magnons will be detected using electron tunnelling. Success in these experiments will allow for alternative qubit implementations, which can significantly benefit the quantum technology sector, including mediating quantum information transfer in hybrid quantum systems and potentially being used as a platform for noise-tolerant quantum computing.
Related Content

Entangled Photon Orbital Angular Momentum Arrays
Summary Arrays of orbital angular momentum (OAM) states of light are a new form of structured light so far relatively unexplored in quantum information science. Unlike spin angular momentum of light, which is related to light’s polarization and covers two dimensions, OAM states, sometimes described as ‘donut beams’ due to the shape of the field […]
September 19, 2019

Novel High-Speed Receiver for Quantum Communication and Sensing
Summary An essential aspect of a quantum channel is the detection and analysis of quantum signals in the form of photons. For most free-space applications, the photons are polarization encoded, e.g. by assigning the ‘0’ to horizontally polarized photons and ‘1’ to vertically polarized photons. However, where the geometric reference is not constant at all […]
January 1, 2019

Quantum Dynamics of Cavity Interactions with Spin Ensembles
Summary High quality factor cavities can be powerful control elements for ensembles of spins, enabling unitary control as well as on demand cooling. They can also be used to couple two otherwise non-interacting ensembles. The goal of the project is to explore the physics and engineering of such systems both theoretically and experimentally. The laboratory contains a […]
September 7, 2016

Extensible Technology for a Medium-Scale Superconducting Quantum Processor
Summary Superconducting quantum bits, or qubits, use circuits made from superconducting materials to harness quantum mechanical states. These devices contain many atoms, but can behave as simple, controllable qubits. We are building technologies for the control and measurement of superconducting qubits to enable the first demonstration of an extensible, medium-scale quantum processor. Our approach […]
November 28, 2016