Spin Resonance Clock Transition of the Endohedral Fullerene ^{15}N@C_{60}.

  title={Spin Resonance Clock Transition of the Endohedral Fullerene ^\{15\}N@C\_\{60\}.},
  author={Reuben Harding and S. H. Zhou and J. Zhou and Thomas Lindvall and William K Myers and Arzhang Ardavan and G. Andrew D. Briggs and Kyriakos Porfyrakis and E. A. Laird},
  journal={Physical review letters},
  volume={119 14},
The endohedral fullerene ^{15}N@C_{60} has narrow electron paramagnetic resonance lines which have been proposed as the basis for a condensed-matter portable atomic clock. We measure the low-frequency spectrum of this molecule, identifying and characterizing a clock transition at which the frequency becomes insensitive to magnetic field. We infer a linewidth at the clock field of 100 kHz. Using experimental data, we are able to place a bound on the clock's projected frequency stability. We… Expand
Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
High-spin magnetic molecules are promising candidates for quantum information processing because their intrinsic multiplicity facilitates information storage and computational operations. However,Expand
Exploiting clock transitions for the chemical design of resilient molecular spin qubits†
A python-based computational tool is employed for the systematic theoretical analysis and chemical optimization of CTs, which arise at anticrossings between spin energy levels and constitute a rich source of physical phenomena in very different kinds of quantum systems. Expand
Parallel-Mode EPR of Atomic Hydrogen Encapsulated in POSS Cages
In a typical EPR experiment, the transitions require that the static magnetic field $$B_0$$ is oriented perpendicular to the microwave field $$B_1$$ (perpendicular mode). This is determined by theExpand
Confinement enhanced spin–orbit interchannel coupling effect on the atomic photoionization
The photoionization cross-section of an atom trapped inside a fullerene anion in the near-threshold region is dominated by the Coulomb confinement resonances. These prominent structures facilitateExpand
Photoionization and Structure of the Superheavy Atoms No, Cn and Og
The photoionization and structure of the superheavy elements No (Nobelium, Z=102), Cn (Copernicium, Z=112) and Og (Oganesson, Z=118) have been studied using Dirac-Fock (DF) andExpand
Bias-tunable two-dimensional magnetic and topological materials.
  • Jie Li, R. Wu
  • Medicine, Physics
  • Nanoscale
  • 2021
A series of 2D materials based on endohedral fullerenes are designed and it is revealed that many of them integrate different functions in a single system, such as ferroelectricity with large electric dipole moments, multiple magnetic phases with both strong magnetic anisotropy and high Curie temperature. Expand
Cavity magnon polaritons with lithium ferrite and three-dimensional microwave resonators at millikelvin temperatures
Single crystal Lithium Ferrite (LiFe) spheres of sub-mm dimension are examined at mK temperatures, microwave frequencies and variable DC magnetic field, for use in hybrid quantum systems andExpand
Electron Spin Echo Envelope Modulation at Clock Transitions in Molecular Spin Qubits
Department of Physics, University of Florida, Gainesville, FL 32611, USA Quantum Theory Project, University of Florida, Gainesville, FL 32611, USA Center for Molecular Magnetic Quantum MaterialsExpand
Permeation of second row neutral elements through Al12P12 and B12P12 nanocages; a first-principles study.
Both exohedral and endohedral complexes of second row elements doped X12Y12 (X = B, Al and Y = P) nano-cages are evaluated for thermodynamic stabilities, electronic properties and kinetic barriers and it is revealed that due to larger diameter, AlP nanocage exhibits low encapsulation barriers in comparison to BP nano- cage. Expand
Quantum phase interference in a fullerene-based molecular qutrit
High spin magnetic molecules are promising candidates for quantum information processing because they intrinsically have multiple sublevels for information storage and computational operations.Expand


Electron paramagnetic resonance study of atomic phosphorus encapsulated in [60]fullerene
Well resolved EPR spectra of P@C60 in solution have been recorded, proving that the encased phosphorus atoms are in their quartet spin ground state. The isotropic hyperfine interaction is increasedExpand
Properties of endohedral N@C60
Abstract Endohedral N@C 60 (atomic nitrogen inside C 60 ) is produced by ion implantation. N@C 60 is soluble in organic solvents and stable in air. A special feature is that it gives a very clearExpand
Group V Endohedral Fullerenes: N@C60, N@C70, and P@C60
In this article, the production and the properties of endohedral fullerenes N@C60, P@C60 and N@C70 are described. The distinct feature of these systems is that the enclosed nitrogen and phosphorousExpand
Time-keeping with electron spin states in diamond
Frequency standards based on atomic states, such as Rb or Cs vapors, or single trapped ions, are the most precise measures of time. Here we introduce a complementary device based on spins in aExpand
Architectures for a Spin Quantum Computer Based on Endohedral Fullerenes
We present a discussion of recent concepts for the construction of a spin quantum computer using endohedral fullerenes. The fullerene molecule is a static, room-temperature trap for atoms with slowlyExpand
Observation of Atomlike Nitrogen in Nitrogen-Implanted Solid C60.
The hyperfine splitting and the isotope effect unambiguously show that the paramagnetic center contains one nitrogen nucleus, and the complex responsible for this center is soluble in toluene and C and is stable. Expand
Conceptual Design of a Micron-Scale Atomic Clock
A theoretical proposal for reducing an entire atomic clock to micron dimensions. A phosphorus or nitrogen atom is introduced into a fullerene cage. This endohedral fullerene is then coated with anExpand
Atomic clock transitions in silicon-based spin qubits.
It is found that electron spin qubits based on clock transitions become less sensitive to the local magnetic environment, including the presence of (29)Si nuclear spins as found in natural silicon. Expand
Designing a quantum computer based on pulsed electron spin resonance
Pulsed ESR measurements show that the decoherence time at 20 K is 13 μs, which is 20 times longer than had been previously reported, and N@C₆₀ can be used for universal two-qubit quantum computing. Expand
Double Resonance Spectra of N14 and N15 Ammonium Ion
The double resonance spectra of N14 and N15 ammonium ion are in good agreement with the spectra calculated with a Hamiltonian that is made stationary by transformation to a rotating coordinateExpand