Readout and control of an endofullerene electronic spin

Pinto, Dinesh; Paone, Domenico; Kern, Bastian; Dierker, Tim; Wieczorek, René; Singha, Aparajita; Dasari, Durga Bhaktavatsala Rao; Finkler, Amit; Harneit, Wolfgang; Wrachtrup, Jörg; Kern, Klaus

doi:10.1038/s41467-020-20202-3

Cited by 17 publications

(11 citation statements)

References 32 publications

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“…It can be coupled to dielectric cavities and plasmonic resonators in order to create single-photon emitters applicable in quantum photonic technologies [9][10][11] . Laser initialization, changing and reading the spin state of an NV − electron allows to control the state of a quantum system and turn NV − centers in diamond into a promising platform for optical quantum computing [12][13][14][15][16][17][18][19] , quantum metrology, sensing and visualization [20][21][22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

NV– diamond laser

et al. 2021

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For the first time, lasing at NV− centers in an optically pumped diamond sample is achieved. A nanosecond train of 150-ps 532-nm laser pulses was used to pump the sample. The lasing pulses have central wavelength at 720 nm with a spectrum width of 20 nm, 1-ns duration and total energy around 10 nJ. In a pump-probe scheme, we investigate lasing conditions and gain saturation due to NV− ionization and NV0 concentration growth under high-power laser pulse pumping of diamond crystal.

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Section: Introductionmentioning

confidence: 99%

NV– diamond laser

et al. 2021

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“…The endohedral fullerenes, − which host various types of atoms and molecules in their cage structures, are particularly attractive, because they exhibit a variety of novel properties due to the presence of the encapsulated atom/molecule. Furthermore, the combination of the endohedral fullerene molecules and the single molecule transistor (SMT) geometry is very promising, because the source/drain electrodes of the SMTs can read out the electronic states of the encapsulated atoms/molecules. − …”

mentioning

confidence: 99%

Inelastic Electron Transport and Ortho–Para Fluctuation of Water Molecule in H₂O@C₆₀ Single Molecule Transistors

Hashikawa

Ito

et al. 2021

Nano Lett.

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Light molecules such as H 2 O are the systems in which we can have access to quantum mechanical information on their constituent atoms. Here, we have investigated electron transport through H 2 O@C 60 single molecule transistors (SMTs). The H 2 O@C 60 SMTs exhibit Coulomb stability diagrams that show multiple tunneling-induced excited states below 30 meV. Furthermore, we have performed terahertz (THz) photocurrent spectroscopy on H 2 O@C 60 SMTs and confirmed the same excitations. From comparison between experiment and theory, the excitations observed below 10 meV are identified to be the quantum rotational excitations of the water molecule. Surprisingly, the quantum rotational excitations of both para-and ortho-water molecule are observed simultaneously even for a single water molecule, indicating that the fluctuation between the ortho-and para-water states takes place in a time scale shorter than our measurement time (∼1 min), probably by the interaction between the encapsulated water molecule and conducting electrons.

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“…1). This behavior is indeed reminiscent of spin echo double resonance (SEDOR) experiments, where the control (π ) pulses drive both spins to refocus their interaction, leading to signal oscillations at the frequency set by the interaction strength [6,14,[42][43][44][45][46][47][48].…”

Section: B X Electronic Spin Qubitmentioning

confidence: 91%

Self-consistent noise characterization of quantum devices

Sun

Cappellaro²

2022

Phys. Rev. B

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Characterizing and understanding the environment affecting quantum systems is critical to elucidate its physical properties and engineer better quantum devices. We develop an approach to reduce the quantum environment causing single-qubit dephasing to a simple yet predictive noise model. Our approach, inspired by quantum noise spectroscopy, is to define a "self-consistent" classical noise spectrum, that is, compatible with all observed decoherence under various qubit dynamics. We demonstrate the power and limits of our approach by characterizing, with nanoscale spatial resolution, the noise experienced by two electronic spins in diamond that, despite their proximity, surprisingly reveal the presence of a complex quantum spin environment, both classically reducible and not. Our results overcome the limitations of existing noise spectroscopy methods and highlight the importance of finding predictive models to accurately characterize the underlying environment. Extending our work to multiqubit systems would enable spatially resolved quantum sensing of complex environments and quantum device characterization, notably to identify correlated noise between qubits, which is crucial for practical realization of quantum error correction.

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Readout and control of an endofullerene electronic spin

Cited by 17 publications

References 32 publications

NV– diamond laser

NV– diamond laser

Inelastic Electron Transport and Ortho–Para Fluctuation of Water Molecule in H₂O@C₆₀ Single Molecule Transistors

Self-consistent noise characterization of quantum devices

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Readout and control of an endofullerene electronic spin

Cited by 17 publications

References 32 publications

NV– diamond laser

NV– diamond laser

Inelastic Electron Transport and Ortho–Para Fluctuation of Water Molecule in H2O@C60 Single Molecule Transistors

Self-consistent noise characterization of quantum devices

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Product

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Inelastic Electron Transport and Ortho–Para Fluctuation of Water Molecule in H₂O@C₆₀ Single Molecule Transistors