Welcome to the Quantum Spin Lab in the Department of Physics and Astronomy at Dartmouth College. We are an experimental research group working at the interface of quantum information processing and condensed matter physics. Our laboratory develops and uses magnetic resonance methods to control and characterize the quantum dynamics of solid state spin systems. Our experiments utilize a variety of techniques including DC, radiofrequency and microwave electronics and cryogenics. We have a number of undergraduate and graduate students working together on a variety of projects. You can find out more about the specific projects under the research tab.
We are actively looking for talented graduate students and postdocs to join the group. Please contact Professor Ramanathan if you are interested!
Recent Lab Highlights
Winter 2024
- Ethan successfully defended his PhD Thesis! Congratulations Dr. Williams! All the best in your postdoc at the Fu lab in Washington.
- We will be presenting at the 2024 APS March Meeting in Minneapolis.
Andrew Cupo: T14.00013 Preparation of Topological Floquet States by Quantum Optimal Control Theory
Ilija Nikolov: D10.00010 Novel Multi-modal Spectroscopy Probe of Emergent Quanutm Order in Materials
Madhumati Seetharaman: S50.00004 Reinforcement Learning for Hamiltonian Engineering of Dipolar Coupled Spin Systems
Ethan Williams: Q46.00011 Decoupling magnetic dipolar interactions between electron spins in diamond
Fall 2023
- Ethan’s manuscript Quantifying the magnetic noise power spectrum for ensembles of P1 and NV centers in diamond is on the arXiv. Learn how to quantify the magnetic noise spectra seen by P1 and NV centers in diamond at different magnetic fields using CPMG dynamical decoupling.
- More DNP and high-field pulsed EPR experiments! Santiago Bussandri’s paper P1 center electron spin clusters are prevalent in type Ib diamond is on the arXiv and has been published in JACS. Collaborative work with Songi Han, Asif Equbal, Daphna Shimon and Susumu Takahashi.
- Anantha’s paper Machine-learning-assisted determination of electronic correlations from magnetic resonance is published in Physical Review Research.
- Margaret Hubble (’21) joins the group.
Summer 2023
- Sekhar is awarded an Experimental Physics Investigator Award from the Gordon and Betty Moore Foundation. Check out the Dartmouth news article.
- Steven’s paper is published in Physical Review B.
- Andrew’s paper is published in Physical Review B.
- Visiting student Madhumati Seetharaman (IISER-Mohali) joins the group.
- Sekhar receives the John M. Manley Huntington Award for Newly Promoted Faculty.
Winter and Spring 2023
- Melody wins an EE Just Undergraduate Fellowship to pursue research into nitrogen-vacancy centers in diamond. Congratulations Melody!
- Wynter is awarded the 2023 Haseltine Chemistry-Physics Prize. They are off to the University of Rochester for graduate school.
- Wynter (Analysis of Dipolar Decoupling Sequences Using Average Hamiltonian Theory and Floquet Theory) and Kat (Quantum Control of Nitrogen-Vacancy Centers in Diamond) successfully defend their senior honors theses.
- Andrew’s paper Optical Conductivity Signatures of Floquet Electronic Phases is submitted. Learn how optical conductivity measurements can indicate signatures of different Floquet phases.
- Undergraduates Divik Verma (’26) and Edward Glover (’25) join the lab. Divik is awarded a UGAR off-term research grant for Summer 2023.
- We present a number of papers at the 2023 APS March Meeting in Las Vegas. Andrew Cupo: G33.00012 Optical Conductivity Signatures of Floquet Electronic Phases
Rong Cong: G39.00009 Observation of orbital fluctuation inducing unconventional magnetic order in a correlated insulator
Sekhar Ramanathan: M58.00001 Suppressing spectral diffusion of phosphorus donor electron spins in natural silicon using optical excitation
Ilia Nikolov: Q56.00013 A Multi-Modal Spectroscopy Technique to Probe Emergent Quantum Order using Magnetic Resonance
Stephen Carr: T56.00013 Multi-modal spectroscopy of phase transitions
Linta Joseph: W74.00013 Entanglement dynamics of an Ising spin chain coupled to a central ancilla - WISP intern Catherine Chu (’26) joins the lab.
See the News Archive here