Collective coupling of a macroscopic number of single-molecule magnets with a microwave cavity mode

Abstract

We report the observation of strong coupling of a macroscopic ensemble of ~10^{16} Fe_8 molecular nanomagnets to the resonant mode of a microwave cavity. We use millimeter-wave spectroscopy to measure the splitting of the system's resonant frequency induced by the coupling between the spins and the cavity mode. The magnitude of this splitting is found to scale with Sqrt[N], where N is the number of collectively coupled spins. We control N by changing the system's temperature and, thereby, the populations of the relevant spin energy levels. Strong coupling is observed for two distinct transitions between spin energy states. Our results indicate that at low temperatures nearly all of the spins in the sample couple with the cavity's resonant mode even though there is substantial inhomogeneous broadening of the Fe8 spin resonances.

Main text: 12 pages, including 3 figures. Supplement: 5 pages, including 2 figures. 17 pages total

References in corpus (15)

• Will spin-relaxation times in molecular magnets permit quantum information processing?
• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Supramolecular Spin Valves
• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
• Solid state quantum memory using the 31P nuclear spin
• Anisotropic rare-earth spin ensemble strongly coupled to a superconducting resonator
• Direct Observation of Quantum Coherence in Single-Molecule Magnets
• Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets
• Electron spin ensemble strongly coupled to a three-dimensional microwave cavity
• Probing dynamics of an electron-spin ensemble via a superconducting resonator
• Spectroscopic properties of inhomogeneously broadened spin ensembles in a cavity
• Magnetic strong coupling in a spin-photon system and transition to classical regime
• Phonon superradiance and phonon laser effect in nanomagnets
• Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets

Cited by in corpus (13)

• Strongly coupled magnons and cavity microwave photons
• Cavity Magnonics
• Magnon dark modes and gradient memory
• Study of strong photon-magnon coupling in a YIG-film split-ring resonant system
• YBCO microwave resonators for strong collective coupling with spin ensembles
• Normal-mode splitting in the coupled system of hybridized nuclear magnons and microwave photons
• Magnon blockade in magnon-qubit systems
• Observation of tunneling-assisted highly forbidden single-photon transitions in a Ni${}_4$ single-molecule magnet
• Dynamics of discrete-time quantum walk with time-correlated unitary noise
• Exceptional points treatment of cavity spectroscopies
• Strong coupling of a Gd${}^{3+}$ multilevel spin system to an on-chip superconducting resonator
• High temperature collective spin-photon coupling in a microwave cavity
• Cavity-Modified Zeeman Effect via Spin-Polariton Formation