Kumar Lab · Stony Brook University
Quantum science with atoms and photons
We build experiments that couple ultracold atoms to optical and microwave photons. We use atom arrays with exquisite control over each atom to engineer efficient atom–photon interfaces — both as tools for quantum information and metrology, and as testbeds for quantum many-body physics.
Current research
Experimental platforms underway in the lab
Cavity-atom arrays of Ytterbium
We are building reconfigurable arrays of ytterbium atoms strongly coupled to optical cavities with wavelength-scale mode waists, in which every atom emits into its own cavity. The platform enables fast cavity-mediated state detection for quantum error correction, photonic interconnects for networking, and measurement-based preparation of entangled states for optical-clock metrology.
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Cryogenic atom array with a superconducting resonator
We are coupling reconfigurable arrays of rubidium atoms to a superconducting millimeter-wave cavity through high-lying Rydberg states. The resulting single-atom cooperativity is orders of magnitude beyond what is possible with optical cavity QED, opening a path to hybrid atom–superconducting-qubit systems and to long-range, photon-mediated interactions across the array.
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Previous work
Earlier collaborations as a graduate student and postdoc.
- 2024Cavity QED in a High-NA ResonatorScience Advances
- 2023Quantum-enabled millimetre-wave to optical transductionNature
- 2018Sorting ultracold atoms in a 3D optical latticeNature
Join
If you are an undergraduate or graduate prospective or current student, or a postdoc interested in doing physics in our lab, please get in touch.
Department
Department of Physics & Astronomy, Stony Brook University. Long Island, New York.