15 research outputs found
Dynamical Characterization and Room-Temperature Control of an Optically Addressable Single Spin in Hexagonal Boron Nitride
Hexagonal boron nitride (h-BN), a wide bandgap, two-dimensional solid-state
material, hosts pure single-photon emitters that have shown signatures of
optically-addressable electronic spins. Here, we report on a single emitter in
h-BN exhibiting optically detected magnetic resonance at room temperature, and
we propose a model for its electronic structure and optical dynamics. Using
photon emission correlation spectroscopy in conjunction with time-domain
optical and microwave experiments, we establish key features of the emitter's
electronic structure. Specifically, we propose a model that includes a spinless
optical ground and excited state, a metastable spin-1/2 configuration, and an
emission modulation mechanism. Using optical and spin dynamics simulations, we
constrain and quantify transition rates in the model, and we design protocols
that optimize the signal-to-noise ratio for spin readout. This constitutes a
necessary step toward quantum control of spin states in h-BN.Comment: 14 pages, 15 figures. arXiv admin note: text overlap with
arXiv:2201.0888
Mapping a 50-spin-qubit network through correlated sensing
Spins associated to optically accessible solid-state defects have emerged as
a versatile platform for exploring quantum simulation, quantum sensing and
quantum communication. Pioneering experiments have shown the sensing, imaging,
and control of multiple nuclear spins surrounding a single electron-spin
defect. However, the accessible size and complexity of these spin networks has
been constrained by the spectral resolution of current methods. Here, we map a
network of 50 coupled spins through high-resolution correlated sensing schemes,
using a single nitrogen-vacancy center in diamond. We develop concatenated
double-resonance sequences that identify spin-chains through the network. These
chains reveal the characteristic spin frequencies and their interconnections
with high spectral resolution, and can be fused together to map out the
network. Our results provide new opportunities for quantum simulations by
increasing the number of available spin qubits. Additionally, our methods might
find applications in nano-scale imaging of complex spin systems external to the
host crystal.Comment: 7 pages, 5 figure
Mapping a 50-spin-qubit network through correlated sensing
Abstract Spins associated to optically accessible solid-state defects have emerged as a versatile platform for exploring quantum simulation, quantum sensing and quantum communication. Pioneering experiments have shown the sensing, imaging, and control of multiple nuclear spins surrounding a single electron spin defect. However, the accessible size of these spin networks has been constrained by the spectral resolution of current methods. Here, we map a network of 50 coupled spins through high-resolution correlated sensing schemes, using a single nitrogen-vacancy center in diamond. We develop concatenated double-resonance sequences that identify spin-chains through the network. These chains reveal the characteristic spin frequencies and their interconnections with high spectral resolution, and can be fused together to map out the network. Our results provide new opportunities for quantum simulations by increasing the number of available spin qubits. Additionally, our methods might find applications in nano-scale imaging of complex spin systems external to the host crystal