Driven-Dissipative Entanglement of Distant Giant Atoms
ORAL
Abstract
The giant-atom regime of quantum optics—where an atom is comparable in size to the interacting wavelength of light—is readily accessible using superconducting circuits [1]. Coupling qubits to multiple points along a microwave waveguide gives rise to interference effects that enable decoherence-free interactions mediated by the 1D photonic continuum. Here, we engineer a system of two giant atoms coupled in series to the same waveguide. To stabilize entanglement between the distant giant atoms, we exploit the phenomena of superradiance and subradiance in driven-dissipative systems [2]. To store and characterize this remote entanglement, we tune the qubit frequencies in situ to employ a complementary interference effect that decouples the atoms from the waveguide. This entanglement-generation scheme naturally supports all-to-all connectivity between sequential giant atoms for applications in distributed quantum computation. In this talk, we present experimental progress toward realizing driven-dissipative entanglement between distant giant atoms.
[1] B. Kannan et al. Waveguide quantum electrodynamics with superconducting artificial giant atoms. Nature 583, 775–779 (2020).
[2] A. Soro et al. Chiral quantum optics with giant atoms. Phys. Rev. A 105, 023712 (2022).
*This research was funded in part by the Army Research Office under Award No. W911NF-23-1-0045; in part by the AWS Center for Quantum Computing; and in part under Air Force Contract No. FA8702-15-D-0001. A.S. and A.F.K. acknowledge support from the Swedish Foundation for Strategic Research (Grant No. FFL21-0279), the Swedish Research Council (Grant No. 2019-03696), and the Knut and Alice Wallenberg Foundation through the Wallenberg Centre for Quantum Technology (WACQT). A.A. acknowledges support from the Clare Boothe Luce Graduate Fellowship. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the U.S. Government.
