TY - JOUR
T1 - Parametrically controlled microwave-photonic interface for the fluxonium
AU - Nie, Ke
AU - Bista, Aayam
AU - Chow, Kaicheung
AU - Pfaff, Wolfgang
AU - Kou, Angela
N1 - We acknowledge useful discussions with Xi Cao, Michael Mollenhauer, Rafael Goncalves, Sonia Rani, Cheeranjeev Purmessur, Supriya Mandal, Shyam Shankar, and Srivatsan Chakram. Our traveling-wave parametric amplifier is provided by IBM. We are grateful to Chunyang Ding and David Schuster for providing us with PCBs. This research is carried out in part in the Materials Research Lab Central Facilities and the Holonyak Micro and Nanotechnology Lab, University of Illinois. This research is partially supported by the Air Force Office of Scientific Research under Award No. FA9550-21-1-032. Research is also sponsored by the Army Research Office and is accomplished under Grant No. W911NF-23-1-0096.
PY - 2024/11
Y1 - 2024/11
N2 - Converting quantum information from stationary qubits to traveling photons enables both fast qubit initialization and efficient generation of flying qubits for redistribution of quantum information. This conversion can be performed using cavity-sideband transitions. In the fluxonium, however, direct cavity-sideband transitions are forbidden due to parity symmetry. Here we circumvent this parity selection rule by using a three-wave mixing element to couple the fluxonium to a resonator. We experimentally demonstrate a scheme for interfacing the fluxonium with traveling photons through microwave-induced parametric conversion. We perform fast reset on the fluxonium qubit, initializing it with >95% ground-state population. We then implement controlled release and temporal shaping of a flying photon, useful for quantum state transfer and remote entanglement. The simplicity and flexibility of our demonstrated scheme enables fluxonium-based remote entanglement architectures.
AB - Converting quantum information from stationary qubits to traveling photons enables both fast qubit initialization and efficient generation of flying qubits for redistribution of quantum information. This conversion can be performed using cavity-sideband transitions. In the fluxonium, however, direct cavity-sideband transitions are forbidden due to parity symmetry. Here we circumvent this parity selection rule by using a three-wave mixing element to couple the fluxonium to a resonator. We experimentally demonstrate a scheme for interfacing the fluxonium with traveling photons through microwave-induced parametric conversion. We perform fast reset on the fluxonium qubit, initializing it with >95% ground-state population. We then implement controlled release and temporal shaping of a flying photon, useful for quantum state transfer and remote entanglement. The simplicity and flexibility of our demonstrated scheme enables fluxonium-based remote entanglement architectures.
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U2 - 10.1103/PhysRevApplied.22.054021
DO - 10.1103/PhysRevApplied.22.054021
M3 - Article
AN - SCOPUS:85209631653
SN - 2331-7019
VL - 22
JO - Physical Review Applied
JF - Physical Review Applied
IS - 5
M1 - 054021
ER -