Coupler characterization of superconducting transmons qubits for cross-resonance gate

Paik, Hanhee; Srinivasan, Srikanth; Rosenblatt, Sami; Chavez-Garcia, José; Bogorin, Daniela F.; Jinka, Oblesh; Keefe, George; Shao, Dongbing; Yau, Jeng-Bang; Brink, Markus; Chow, Jerry M.

doi:10.1109/iedm13553.2020.9371955

Cited by 1 publication

(2 citation statements)

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“…As an example, Figure (b) illustrates the circuit that effectively maps the 8 × 8 Hamiltonian corresponding to a 3-qubit entangling gate. Alternatively, bilinear couplings can also be established by beams splitters, , as previously investigated for transmons. , The 4 × 4 and 8 × 8 circuits in Figure can be generalized as well to include arbitrary flux-biased Josephson circuits as a replacement for the SNAILs and the nearly quartic couplers.…”

Section: Modular Quantum Circuitsmentioning

confidence: 99%

“…A nearly quartic element can be used to implement ultrastrong cross-Kerr couplings 41 between photonic modes described by the interaction Hamiltonian, 50,51 as previously investigated for transmons. 52,53 The 4 × 4 and 8 × 8 circuits in Figure 2 can be generalized as well to include arbitrary fluxbiased Josephson circuits as a replacement for the SNAILs and the nearly quartic couplers.…”

Section: Modular Quantum Circuitsmentioning

confidence: 99%

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Mapping Molecular Hamiltonians into Hamiltonians of Modular cQED Processors

Lyu,

Miano,

Tsioutsios

et al. 2023

J. Chem. Theory Comput.

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We introduce a general method based on the operators of the Dyson-Masleev transformation to map the Hamiltonian of an arbitrary model system into the Hamiltonian of a circuit Quantum Electrodynamics (cQED) processor. Furthermore, we introduce a modular approach to programming a cQED processor with components corresponding to the mapping Hamiltonian. The method is illustrated as applied to quantum dynamics simulations of the Fenna-Matthews-Olson (FMO) complex and the spin-boson model of charge transfer. Beyond applications to molecular Hamiltonians, the mapping provides a general approach to implement any unitary operator in terms of a sequence of unitary transformations corresponding to powers of creation and annihilation operators of a single bosonic mode in a cQED processor.

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