I am an Institute for Quantum Information and Matter (IQIM) postdoctoral scholar in Oskar Painter’s group at Caltech. I received my PhD from Harvard where I worked in Marko Loncar’s group.

I perform experimental research on a broad variety of solid-state quantum platforms including superconducting circuits, defect center spins, and nanoscale optical and acoustic devices. I am interested in connecting quantum particles coherently across these very different systems. My work aims to develop new tools and techniques to build large-scale quantum systems for computation, communication and sensing.

You can reach me by email at srujan[at]caltech[dot]edu.




News

  • 3/6/2024 I will be giving a talk at the APS March Meeting in Minneapolis [link].

  • 2/29/2024 I am visiting Boston University and giving a seminar.

  • 2/23/2024 Our work on the non-classical microwave-optical photon-pair source is now published in Nature Physics! [link]

  • 2/20/2024 I will be visiting Rice University and giving a seminar.

  • 1/31/2024 I will be visiting JILA and giving a colloquium titled ‘Generating quantum correlations between light and microwaves with a chip-scale device’.

  • 12/22/2023 My last paper of this year reports generation of entangled states of photons of light and photons in an electrical circuit. This is the first observation of microwave-optical Bell pairs. Preprint titled ‘Quantum entanglement between optical and microwave photonic qubits’ is now up on the arXiV!

  • 12/04/2023 New preprint titled ‘In-situ tuning of optomechanical crystals with nano-oxidation’ up on the arXiV.

  • 11/17/2023 I am giving the ECE Quantum Seminar at the University of Southern California (USC).

  • 11/14/2023 I have been awarded the Boeing Quantum Creator’s Prize and will be giving a talk at the Chicago Quantum Summit. Many thanks to the Chicago Quantum Exchange and Boeing for this recognition!

  • 10/30/2023 New preprint titled ‘High Q-factor diamond optomechanical resonators with silicon vacancy centers at millikelvin temperatures’ up on the arXiV. These are the first measurements of microwave frequency diamond nanomechanical devices at mK temperatures.

  • 07/25/2023 I am giving an invited seminar in Marko Loncar’s group at Harvard. Excited to visit my old home :).

  • 07/19/2023 I am presenting at the AWS Quantum Networks (QuNeW) Workshop in Beverly MA.

  • 07/07/2023 Our paper titled ‘Design of an ultra-low mode volume piezo-optomechanical quantum transducer’ is now out in Optics Express. This work presents a new design approach for low-noise microwave-optical quantum transducers.

  • 06/29/2023 I am giving an invited seminar in Alp Sipahigil’s group at UC Berkeley.

  • 03/30/2023 New preprint titled ‘Non-classical microwave-optical photon pair generation with a chip-scale transducer’ up on the arXiV. We made the first microwave-optical photon-pair source and observed quantum correlations between light and an electrical circuit. Super excited to put this work out!

  • 03/27/2023 I am giving an invited talk on my recent work on microwave-optical quantum transducers at the AWS Center for Quantum Networks.

  • 03/10/2023 I am giving a talk at the APS March Meeting titled ‘Microwave-optical photon correlations in a piezo-optomechanical transducer’.