About

Shibani Ghosh is associated with the Bronfenbrenner Center for Translational Research at Cornell University. The center assists faculty in developing translational research projects by providing support such as proposal preparation assistance, training, technical support, and help in brokering collaborative relationships. The center also offers workshops, summer institutes, and talks on current research topics related to translational research. The BCTR's mission includes facilitating research that can be translated into practical applications, supporting faculty in gaining access to diverse research participants and unique data sets, and fostering collaborative efforts to enhance research impact.

Research topics

• Physics
• Computer Science
• Quantum mechanics
• Internal medicine
• Embedded system
• Combinatorics
• Mathematics
• Materials science
• Nanotechnology
• Optoelectronics
• Thermodynamics
• Medicine

Selected publications

• Cavity-Driven Multispectral Gain for High-Sensitivity NV Center Magnetometers

  ArXiv.org · 2026-01-07

  articleOpen access

  We report a cavity-enabled solid-state magnetometer based on an NV ensemble coupled with a dielectric cavity, achieving 12 pT/$\sqrt{\rm{Hz}}$ sensitivity and a nearly threefold gain from multispectral features. The features originate from cavity-induced splitting of the NV hyperfine levels and leverages robust quantum coherence in the doubly dressed states of the system to achieve high sensitivity. We project simulated near-term sensitivities approaching 100 fT/$\sqrt{\rm{Hz}}$, close to the Johnson-Nyquist limit. Our results establish frequency multiplexing as a new operational paradigm, offering a robust and scalable quantum resource for metrology under ambient conditions.

  PublisherOA PDF

• Cavity-Driven Multispectral Gain for High-Sensitivity NV Center Magnetometers

  arXiv (Cornell University) · 2026-01-07

  preprintOpen access

  We report a cavity-enabled solid-state magnetometer based on an NV ensemble coupled with a dielectric cavity, achieving 12 pT/$\sqrt{\rm{Hz}}$ sensitivity and a nearly threefold gain from multispectral features. The features originate from cavity-induced splitting of the NV hyperfine levels and leverages robust quantum coherence in the doubly dressed states of the system to achieve high sensitivity. We project simulated near-term sensitivities approaching 100 fT/$\sqrt{\rm{Hz}}$, close to the Johnson-Nyquist limit. Our results establish frequency multiplexing as a new operational paradigm, offering a robust and scalable quantum resource for metrology under ambient conditions.

  PublisherDOI

• Observation of Optically Induced Collective Effects in Floquet Driven Three-Level Atoms

  2025-01-01

  articleSenior author

  Observation of a novel, emergent spectroscopic feature in a Floquet driven ensemble of cold 87 Rb atoms, as narrowing of one-photon spectral envelope with the total number of interacting atoms and results from numerical simulation.

  PublisherDOI

• Vector Magnetometry With Spin-1 Manifold of Ultracold 87Rb Atoms

  2024-01-01

  articleSenior author

  We simultaneously store and retrieve light pulses in the long-lived ground state coherences of 87 Rb spin-1 manifold. The retrieved signal from this atomic interferometer can be characterised and used for vector magnetometry with high precision.

  PublisherDOI

• Coherence as an indicator to discern electromagnetically induced transparency and Autler-Townes splitting

  arXiv (Cornell University) · 2023-09-05

  preprintOpen accessSenior author

  Electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS) are generally characterized and distinguished by the width of the transparency created in the absorption profile of a weak probe in presence of a strong control field. This often leads to ambiguities, as both phenomena yield similar spectroscopic signature. However, an objective method based on Akaike's Information Criterion (AIC) test offers a quantitative way to discern the two regimes when applied on the probe absorption profile. The obtained transition value of control field strength was found to be higher than the value given by pole analysis of the corresponding off-diagonal density matrix element. By contrast, we apply the test on ground state coherence and the measured coherence quantifier, which yields a distinct transition point around the predicted value even in presence of noise. Our test accurately captures the transition between two regimes, indicating that a proper measure of coherence is essential for making such distinctions.

  PublisherOA PDFDOI

• Coherence as an indicator to discern electromagnetically induced transparency and Autler–Townes splitting

  Journal of the Optical Society of America B · 2023-11-14 · 2 citations

  articleSenior authorCorresponding

  Electromagnetically induced transparency (EIT) and Autler–Townes splitting (ATS) are generally characterized and distinguished by the width of the transparency created in the absorption profile of a weak probe in presence of a strong control field. This often leads to ambiguities, as both phenomena yield similar spectroscopic signatures. However, an objective method based on Akaike’s information criterion (AIC) test offers a quantitative way to discern the two regimes when applied on the probe absorption profile. The obtained transition value of control field strength was found to be higher than the value given by pole analysis of the corresponding off-diagonal density matrix element. By contrast, we apply the test on ground state coherence and the measured coherence quantifier, which yields a distinct transition point around the predicted value even in presence of noise. Our test accurately captures the transition between two regimes, indicating that a proper measure of coherence is essential for making such distinctions.

  PublisherDOI

• A polariton interferometer

  Conference on Lasers and Electro-Optics · 2021-01-01

  articleSenior authorCorresponding

  We report a novel interferometer, where two dark-state polaritons, stored in a spin-1 atom, interfere. One can thereby measure both optical and atomic phases, in the form of field polarizations and applied magnetic fields.

  PublisherDOI

• Observation of Quantum Phase Synchronization in Spin-1 Atoms

  Physical Review Letters · 2020 · 95 citations

  Senior authorCorresponding
  • Physics
  • Quantum mechanics

  With growing interest in quantum technologies, possibilities of synchronizing quantum systems have garnered significant recent attention. In experiments with dilute ensemble of laser cooled spin-1 ^{87}Rb atoms, we observe phase difference of spin coherences to synchronize with phases of external classical fields. An initial limit-cycle state of a spin-1 atom localizes in phase space due to dark-state polaritons generated by classical two-photon tone fields. In particular, when the two couplings fields are out of phase, the limit-cycle state synchronizes only with two artificially engineered, anisotropic decay rates. Furthermore, we observe a blockade of synchronization due to quantum interference and emergence of Arnold-tongue-like features. Such anisotropic decay induced synchronization of spin-1 systems with no classical analog can provide insights in open quantum systems and find applications in synchronized quantum networks.

  PublisherOA PDFDOI

• Observation of quantum synchronization and blockade in spin-1 atom

  Bulletin of the American Physical Society · 2020

  Senior authorCorresponding
  • Computer Science
  • Physics
  • Quantum mechanics
  Publisher

• Quantum phase synchronization and blockade in spin-1 system

  Conference on Lasers and Electro-Optics · 2020-01-01

  articleSenior authorCorresponding

  We report observation of quantum phase synchronization of spin-1 atoms, with the relative phase getting entrained with external drive phases in presence of anisotropic decay channels.

  PublisherDOI

Frequent coauthors

• Haruka Tanji

  Fukushima Medical University Hospital

  30 shared

• Jonathan Simon

  30 shared

• Vladan Vuletić

  MIT-Harvard Center for Ultracold Atoms

  22 shared

• R. Kolbeck

  19 shared

• Arif Warsi Laskar

  University of Bonn

  16 shared

• Pratik Adhikary

  14 shared

• Benjamin Bloom

  13 shared

• Stefanie Thiele

  13 shared

Education

• Ph.D., Physics

  Cornell University

  2006