Research in theoretical atomic physics and particle astrophysics. My work focusses on high-precision atomic structure calculations, and how atomic processes can be used for testing fundamental theories, probing for physics beyond the standard model, and searching for dark matter.

*Les Houches, 2023*

### Available projects at UQ (PhD, masters, honours, and undergraduate)

- Atomic physics as a probe of the Standard Model at low energies
- Development of high-precision atomic structure methods
- Theoretical characterisation of systems for the development of atomic clocks
- Enlightening the search for dark matter (and other exotic physics)
- For more details, see: researchers.uq.edu.au/researcher/24237
- Projects are flexible and other projects are available, contact me with any questions
- Formal applications are made through the University of Queensland – smp.uq.edu.au/study/higher-degree-research. Feel free to contact me directly with any questions

### Links

- ORCiD: orcid.org/0000-0002-0345-6375
- arXiv profile (all papers, free downloads): arxiv.org/a/roberts_b_1
- Google Scholar profile
- InspireHEP: B.M.Roberts.1
- ADS publications page
- UQ page
- Brief CV (pdf)
- Full publications list (pdf)
- Recent slides/presentations

## Recent publications

# Ultralight Dark Matter Search with Space-Time Separated Atomic Clocks and Cavities

Melina Filzinger, Ashlee R. Caddell, Dhruv Jani, Martin Steinel, Leonardo Giani, Nils Huntemann, and Benjamin M. Roberts, arXiv:2312.13723

# Accurate electron-recoil ionization factors for dark matter direct detection in xenon, krypton and argon

A. R. Caddell, V. V. Flambaum, and B. M. Roberts, Phys. Rev. D **108**, 083030 (2023)

# Electric dipole transition amplitudes for atoms and ions with one valence electron

B. M. Roberts, C.J. Fairhall, and J. S. M. Ginges, Physical Review A **107**, 052812 (2023)

# Experimental and theoretical study of dynamic polarizabilities in the 5S_1/2 - 5D_5/2 clock transition in rubidium-87 and determination of E1 matrix elements

R. Hamilton, B. M. Roberts, S. K. Scholten, C. Locke, A. N. Luiten, J. S. M. Ginges, and C. Perrella, Physical Review Applied **19**, 054059 (2023)

# QED radiative corrections to electric dipole amplitudes in heavy atoms

C.J. Fairhall, B. M. Roberts, and J. S. M. Ginges, Phys. Rev. A. **107**, 022813 (2023)

# Empirical determination of the Bohr-Weisskopf effect in cesium and improved tests of precision atomic theory in searches for new physics

G. Sanamyan, B. M. Roberts, J. S. M. Ginges, Phys. Rev. Lett. **130**, 053001 (2023)

# Bohr-Weisskopf effect: From hydrogenlike-ion experiments to heavy-atom calculations of the hyperfine structure

B. M. Roberts, P. G. Ranclaud, J. S. M. Ginges, Phys. Rev. A. **105**, 018301 (2022)

# Comment on 'New physics constraints from atomic parity violation in 133-Cs'

B. M. Roberts, J. S. M. Ginges, Phys. Rev. D. **105**, 018301 (2022)

# The hyperfine anomaly in heavy atoms and its role in precision atomic searches for new physics

B. M. Roberts, J. S. M. Ginges Phys. Rev. A. **104**, 022823 (2021)

# Searching for Dark Matter with an Optical Cavity and an Unequal-Delay Interferometer

Etienne Savalle, Aurelien Hees, Florian Frank, Etienne Cantin, *et al.*, Phys. Rev. Lett. **126**, 051301 (2021)

# Precision Measurement Noise Asymmetry and Its Annual Modulation as a Dark Matter Signature

Benjamin M. Roberts, Andrei Derevianko, Universe **7**, 50 (2021)

# Applying the matched-filter technique to the search for dark matter transients with networks of quantum sensors

Guglielmo Panelli, B. M. Roberts, A. Derevianko, EPJ Quantum Technol. **7**, 5 (2020)

# Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks

Benjamin M. Roberts, Pacome Delva, Ali Al-Masoudi, Anne Amy-Klein, *et al.*, New J. Phys. **22**, 093010 (2020) – **Featured article**

# Nuclear Magnetic Moments of Francium-207–213 from Precision Hyperfine Comparisons

B. M. Roberts, J. S. M. Ginges, Phys. Rev. Lett. **125**, 063002 (2020)

# Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

A. Hees, T. Do, B. M. Roberts, Andrea M. Ghez, *et al.*, Phys. Rev. Lett. **124**, 081101 (2020) – **Editors’ Suggestion**

# Correlation trends in the hyperfine structure for Rb, Cs, and Fr, and high-accuracy predictions for hyperfine constants

S. J. Grunefeld, B. M. Roberts, J. S. M. Ginges, Phys. Rev. A **100**, 042506 (2019)

# Electron-interacting dark matter: Implications from DAMA/LIBRA-phase2 and prospects for liquid xenon detectors and NaI detectors

B. M. Roberts, V. V. Flambaum, Phys. Rev. D **100**, 063017 (2019)

# Calculations of the atomic structure for the low-lying states of actinium

V. A. Dzuba, V. V. Flambaum, B. M. Roberts, Phys. Rev. A **100**, 022504 (2019)

# Search for transient ultralight dark matter signatures with networks of precision measurement devices using a Bayesian statistics method

B. M. Roberts, G. Blewitt, C. Dailey, A. Derevianko, Phys. Rev. D **97**, 083009 (2018)

# Search for domain wall dark matter with atomic clocks on board global positioning system satellites

B. M. Roberts, G. Blewitt, C. Dailey, M. Murphy, *et al.*, Nature Commun. **8**, 1195 (2017)

# Dark matter scattering on electrons: Accurate calculations of atomic excitations and implications for the DAMA signal

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, M. Pospelov, *et al.*, Phys. Rev. D **93**, 115037 (2016)

# Low-energy atomic phenomena: probing fundamental physics and searching for dark matter

B. M. Roberts, PhD Thesis, UNSW, (2016)

# Ionization of Atoms by Slow Heavy Particles, Including Dark Matter

B. M. Roberts, V. V. Flambaum, G. F. Gribakin, Phys. Rev. Lett. **116**, 023201 (2016)

# Parity and Time-Reversal Violation in Atomic Systems

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Annu. Rev. Nucl. Part. Sci. **65**, 63–86 (2015)

# 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, V. V. Flambaum, N. Leefer, D. Budker, Phys. Rev. D **90**, 096005 (2014) – **Editors’ Suggestion**

# Tests of CPT and Lorentz symmetry from muon anomalous magnetic dipole moment

Y. V. Stadnik, B. M. Roberts, V. V. Flambaum, Phys. Rev. D **90**, 045035 (2014)

# Limiting P-Odd Interactions of Cosmic Fields with Electrons, Protons, and Neutrons

B. M. Roberts, Y. V. Stadnik, V. A. Dzuba, V. V. Flambaum, N. Leefer, D. Budker, Phys. Rev. Lett. **113**, 081601 (2014)

# Strongly enhanced atomic parity violation due to close levels of opposite parity

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Phys. Rev. A **89**, 042509 (2014)

# Nuclear-spin-dependent parity nonconservation in s-d5/2 and s-d3/2 transitions

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Phys. Rev. A **89**, 012502 (2014)

# Double-core-polarization contribution to atomic parity-nonconservation and electric-dipole-moment calculations

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Phys. Rev. A **88**, 042507 (2013)

# Parity nonconservation in Fr-like actinide and Cs-like rare-earth-metal ions

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Phys. Rev. A **88**, 012510 (2013)

# Quantum electrodynamics corrections to energies, transition amplitudes, and parity nonconservation in Rb, Cs, Ba^+, Tl, Fr, and Ra^+

B. M. Roberts, V. A. Dzuba, V. V. Flambaum, Phys. Rev. A **87**, 054502 (2013)

# Calculation of the parity-violating 5s-6s E1 amplitude in the rubidium atom

V. A. Dzuba, V. V. Flambaum, B. M. Roberts, Phys. Rev. A **86**, 062512 (2012)

# Revisiting Parity Nonconservation in Cesium

V. A. Dzuba, J. C. Berengut, V. V. Flambaum, B. M. Roberts, Phys. Rev. Lett. **109**, 203003 (2012)

# Parity Nonconservation in Atomic Transitions and Tests of Unification Theories

B. M. Roberts, Honours Thesis (UNSW) (2012)