Kavli Affiliate: Irfan Siddiqi
| First 5 Authors: Brian Marinelli, Alex H. Rubin, Victoria A. Norman, Santai Yang, Ravi Naik
| Summary:
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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