Year: 2022
Type: article
Abstract: Deterministic photon-photon gates enable the controlled generation of entanglement between mobile carriers of quantum information.Such gates have thus far been exclusively realized in the optical domain and by relying on postselection.Here, we present a nonpostselected, deterministic, photon-photon gate in the microwave frequency range realized using superconducting circuits.We emit photonic qubits from a source chip and route those qubits to a gate chip with which we realize a universal gate set by combining controlled absorption and reemission with single-qubit gates and qubit-photon controlled-phase gates.We measure quantum process fidelities of 75% for single-and of 57% for two-qubit gates, limited mainly by radiation loss and decoherence.This universal gate set has a wide range of potential applications in superconducting quantum networks.
Source: Physical Review X
Institution: ETH Zurich
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,016
OpenAlex ID: W3168720035