Publications (16)
Measurement of hyperfine structure and isotope shifts in the Dy 421-nm transition
N. Leefer, A Cingöz, D. Budker
A measurement of the hyperfine coefficients and isotope shifts for the Dy I 421.291 nm transition [] using atomic beam laser-induced fluoresc…
New limits on variation of the fine-structure constant using atomic dysprosium
N. Leefer, C. T. M. Weber, A. Cingöz +2
We report on the spectroscopy of radio-frequency transitions between nearly-degenerate, opposite-parity excited states in atomic dysprosium (Dy). Theoretical calculations predict t…
All-optical atomic magnetometers based on nonlinear magneto-optical rotation with amplitude modulated light
S. Pustelny, A. Wojciechowski, M. Kotyrba +11
We demonstrate a magnetometric technique based on nonlinear magneto-optical rotation using amplitude modulated light. The magnetometers can be operated in either open-loop (typical…
Parity-violating interactions of cosmic fields with atoms, molecules, and nuclei: Concepts and calculations for laboratory searches and extracting limits
B. M. Roberts, Y. V. Stadnik, V. A. Dzuba +3
We propose methods and present calculations that can be used to search for evidence of cosmic fields by investigating the parity-violating effects, including parity nonconservation…
BASE - The Baryon Antibaryon Symmetry Experiment
C. Smorra, K. Blaum, L. Bojtar +17
The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moment…
Limits on Violations of Lorentz Symmetry and the Einstein Equivalence Principle using Radio-Frequency Spectroscopy of Atomic Dysprosium
M. A. Hohensee, N. Leefer, D. Budker +3
We report a joint test of local Lorentz invariance and the Einstein equivalence principle for electrons, using long-term measurements of the transition frequency between two nearly…
Nonlinear Magneto-Optical Rotation in Rubidium Vapor Excited with Blue Light
S. Pustelny, L. Busaite, A. Akulshin +3
We present experimental and numerical studies of nonlinear magneto-optical rotation (NMOR) in rubidium vapor excited with resonant light tuned to the $5^2\!S_{1/2}\rightarrow 6^2\!…
Cavity-enhanced room-temperature magnetometry using absorption by nitrogen-vacancy centers in diamond
K. Jensen, N. Leefer, A. Jarmola +5
We demonstrate a cavity-enhanced room-temperature magnetic field sensor based on nitrogen-vacancy centers in diamond. Magnetic resonance is detected using absorption of light reson…
Limit on the Temporal Variation of the Fine-Structure Constant Using Atomic Dysprosium
A. Cingoz, A. Lapierre, A. -T. Nguyen +4
Over a period of eight months, we have monitored transition frequencies between nearly degenerate, opposite-parity levels in two isotopes of atomic dysprosium (Dy). These transitio…
Investigation of the Gravitational Potential Dependence of the Fine-Structure Constant Using Atomic Dysprosium
S. J. Ferrell, A. Cingöz, A. Lapierre +6
Radio-frequency E1 transitions between nearly degenerate, opposite parity levels of atomic dysprosium were monitored over an eight month period to search for a variation in the fin…
Search for the effect of massive bodies on atomic spectra and constraints on Yukawa-type interactions of scalar particles
N. Leefer, A. Gerhardus, D. Budker +2
We propose a new method to search for hypothetical scalar particles that have feeble interactions with Standard-Model particles. In the presence of massive bodies, these interactio…
Limiting P-odd interactions of cosmic fields with electrons, protons and neutrons
B. M. Roberts, Y. V. Stadnik, V. A. Dzuba +3
We propose methods for extracting limits on the strength of P-odd interactions of pseudoscalar and pseudovector cosmic fields with electrons, protons and neutrons. Candidates for s…
Towards a new measurement of parity violation in dysprosium
N. Leefer, L. Bougas, D. Antypas +1
The dysprosium parity violation experiment concluded nearly 17 years ago with an upper limit on weak interaction induced mixing of nearly degenerate, opposite parity states in atom…
Transverse laser cooling of a thermal atomic beam of dysprosium
N. Leefer, A. Cingöz, B. Gerber-Siff +3
A thermal atomic beam of dysprosium (Dy) atoms is cooled using the transition at 421 nm. The cooling is done via a standing light wave ort…
Investigation of ac-Stark shifts in excited states of dysprosium relevant to testing fundamental symmetries
C. T. M. Weber, N. Leefer, D. Budker
We report on measurements of the differential polarizability between the nearly degenerate, opposite parity states in atomic dysprosium at 19797.96 cm. The differential scal…
The Infrared Absorption Band and Vibronic Structure of the Nitrogen-Vacancy Center in Diamond
P. Kehayias, M. W. Doherty, D. English +7
Negatively-charged nitrogen-vacancy (NV) color centers in diamond have generated much interest for use in quantum technology. Despite the progress made in developing their appl…