M. Affolter
National Institute of Standards and Technology
PhysicsKinetic energyIonFourier transform ion cyclotron resonanceAmplitudeQuantum limitAtomic physicsWaves in plasmasMaterials scienceIon cyclotron resonanceInstabilityRange (particle radiation)CyclotronMolecular physicsMechanicsElectric fieldDragPlasmaQuantumQuantum sensor
35Publications
6H-index
57Citations
Publications 35
Newest
#1Kevin A. GilmoreH-Index: 8
#2M. Affolter (NIST: National Institute of Standards and Technology)H-Index: 6
Last. John J. Bollinger (NIST: National Institute of Standards and Technology)H-Index: 56
view all 7 authors...
Fully controllable ultracold atomic systems are creating opportunities for quantum sensing, yet demonstrating a quantum advantage in useful applications by harnessing entanglement remains a challenging task. Here, we realize a many-body quantum-enhanced sensor to detect displacements and electric fields using a crystal of ~150 trapped ions. The center-of-mass vibrational mode of the crystal serves as a high-Q mechanical oscillator, and the collective electronic spin serves as the measurement dev...
Source
#1Kevin A. GilmoreH-Index: 8
#2M. AffolterH-Index: 6
Last. John J. BollingerH-Index: 56
view all 7 authors...
Developing the isolation and control of ultracold atomic systems to the level of single quanta has led to significant advances in quantum sensing, yet demonstrating a quantum advantage in real world applications by harnessing entanglement remains a core task. Here, we realize a many-body quantum-enhanced sensor to detect weak displacements and electric fields using a large crystal of \sim 150trapped ions. The center of mass vibrational mode of the crystal serves as high-Q mechanical oscillato...
Source
#1M. Affolter (NIST: National Institute of Standards and Technology)H-Index: 6
#2Kevin A. GilmoreH-Index: 8
Last. John J. BollingerH-Index: 56
view all 4 authors...
Trapped ions are sensitive detectors of weak forces and electric fields that excite ion motion. Here measurements of the center-of-mass motion of a trapped-ion crystal that are phase-coherent with an applied weak external force are reported. These experiments are conducted far from the trap motional frequency on a two-dimensional trapped-ion crystal of approximately 100 ions, and determine the fundamental measurement imprecision of our protocol free from noise associated with the center-of-mass ...
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#8John R. Bollinger (NIST: National Institute of Standards and Technology)H-Index: 4
The authors theoretically and numerically investigate the in-plane motion of two-dimensional ion crystals stored in Penning traps. They find that the thermal fluctuations in the in-plane positions of ions, described by normal modes whose potential energy is several hundred times larger than their kinetic energy, strongly contribute to the spectral broadening of the transverse drumhead motion.
Source
#1M. AffolterH-Index: 6
#2Kevin A. GilmoreH-Index: 8
Last. John J. BollingerH-Index: 56
view all 4 authors...
#1M. Affolter (UCSD: University of California, San Diego)H-Index: 6
#2Francois Anderegg (UCSD: University of California, San Diego)H-Index: 16
Last. C. F. Driscoll (UCSD: University of California, San Diego)H-Index: 24
view all 5 authors...
Large amplitude, near-acoustic plasma waves have a temperature-dependent harmonic content and nonlinear frequency shifts. On cold plasmas, experiments show that fluid nonlinearities dominate, and the observed harmonic content is well predicted by a recent fluid analysis. In contrast, the measured nonlinear frequency shift is smaller than this theory prediction, suggesting the presence of other nonlinear effects neglected in this analysis. When the plasma is heated, kinetic effects become importa...
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