51 citations · 177 across the 13 of their papers we have counts for
14 papers
FTB Graph: Determining and Validating First-token Broadcasters and Language-Identity Head Circuits in Multilingual Language Models
Arjun Pillai, Christian Hoang, Anjelo Laroza
Large language models operating in multilingual contexts must resolve target response languages early in generation, yet the causal circuitry governing first-token language identit…
Quantum Sensors for Chemistry and Materials Science
Piotr Put, Arjun Pillai, Xuan Hoang Le +2
The advancement of chemistry and materials science relies on transformative analytical tools which can overcome the sensitivity, spatial resolution, and throughput limitations of c…
First-Token Broadcasters: Mechanistic Origins of Language Identity and Distributed Robustness in Transformers
Arjun Pillai, Christian Hoang, Anjelo Jann Laroza
Why do multilingual language models sometimes generate in the wrong language, and why is this so hard to fix? We introduce Language Identity Head Ablation (LIHA), a causal interven…
Gemini 2.5: Pushing the Frontier with Advanced Reasoning, Multimodality, Long Context, and Next Generation Agentic Capabilities
Gheorghe Comanici, Eric Bieber, Mike Schaekermann +3431
In this report, we introduce the Gemini 2.X model family: Gemini 2.5 Pro and Gemini 2.5 Flash, as well as our earlier Gemini 2.0 Flash and Flash-Lite models. Gemini 2.5 Pro is our…
Wideband covariance magnetometry below the diffraction limit
Xuan Hoang Le, Pavel E. Dolgirev, Piotr Put +6
We experimentally demonstrate a method for measuring correlations of wideband magnetic signals with spatial resolution below the optical diffraction limit. Our technique employs tw…
Roadmap on Nanoscale Magnetic Resonance Imaging
Raffi Budakian, Amit Finkler, Alexander Eichler +22
The field of nanoscale magnetic resonance imaging (NanoMRI) was started 30 years ago. It was motivated by the desire to image single molecules and molecular assemblies, such as pro…
Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
Kieren Harkins, Christoph Fleckenstein, Noella D'Souza +16
Thermalization phenomena, while ubiquitous in quantum systems, have traditionally been viewed as obstacles to be mitigated. In this study, we demonstrate the ability, instead, to h…
Electron induced nanoscale nuclear spin relaxation probed by hyperpolarization injection
William Beatrez, Arjun Pillai, Otto Janes +2
We report on experiments that quantify the role of a central electronic spin as a relaxation source for nuclear spins in its nanoscale environment. Our strategy exploits hyperpolar…
Continuously tracked, stable, large excursion trajectories of dipolar coupled nuclear spins
Ozgur Sahin, Hawraa Al Asadi, Paul Schindler +9
We report an experimental approach to excite, stabilize, and continuously track Bloch sphere orbits of dipolar-coupled nuclear spins in a solid. We demonstrate these results on a m…
Observation of a critical prethermal discrete time crystal created by two-frequency driving
William Beatrez, Christoph Fleckenstein, Arjun Pillai +8
We report the observation of long-lived Floquet prethermal discrete time crystalline (PDTC) order in a three-dimensional position-disordered lattice of interacting dipolar-coupled…
Rapidly enhanced spin polarization injection in an optically pumped spin ratchet
Adrisha Sarkar, Brian Blankenship, Emanuel Druga +6
Rapid injection of spin polarization into an ensemble of nuclear spins is a problem of broad interest, spanning dynamic nuclear polarization (DNP) to quantum information science. W…
Electron-to-nuclear spectral mapping via "Galton board" dynamic nuclear polarization
Arjun Pillai, Moniish Elanchezhian, Teemu Virtanen +2
We report on a strategy to indirectly readout the spectrum of an electronic spin via polarization transfer to nuclear spins in its local environment. The nuclear spins are far more…
"Galton board" nuclear hyperpolarization
Moniish Elanchezhian, Arjun Pillai, Teemu Virtanen +1
We consider the problem of determining the spectrum of an electronic spin via polarization transfer to coupled nuclear spins and their subsequent readout. This suggests application…
Floquet prethermalization with lifetime exceeding 90s in a bulk hyperpolarized solid
William Beatrez, Otto Janes, Amala Akkiraju +9
We report the observation of long-lived Floquet prethermal states in a bulk solid composed of dipolar-coupled C nuclei in diamond at room temperature. For precessing nuclear…