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arXiv · 2501.18751

Observation of Photon Blockade in a Tavis-Cummings System

Brian Marinelli·Alex H. Rubin·Victoria A. Norman·Santai Yang·Ravi Naik·Bethany M. Niedzielski·David K. Kim·Rabindra Das·Mollie Schwartz·David I. Santiago·Christopher Spitzer·Irfan Siddiqi·Marina Radulaski
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Abstract

We observe blockade of microwave photons in a Tavis-Cummings system comprising a superconducting cavity and up to $N=3$ transmon qubits. The effect is characterized with photon number-resolving spectroscopy using an additional dispersively coupled transmon "witness" qubit to directly probe the cavity's photon number distribution. We first observe polariton formation with splitting proportional to $\sqrt{N}$, confirming the Tavis-Cummings coupling, and subsequently obtain sub-Poissonian cavity photon statistics when the cavity is driven at polariton frequencies.

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Brian Marinelli, Alex H. Rubin, Victoria A. Norman, Santai Yang, Ravi Naik, Bethany M. Niedzielski, David K. Kim, Rabindra Das, Mollie Schwartz, David I. Santiago, Christopher Spitzer, Irfan Siddiqi, Marina Radulaski. 2025-01-30. Observation of Photon Blockade in a Tavis-Cummings System. https://arxiv.org/abs/2501.18751

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