Programmable energy-selective local reservoirs stabilize entangled single-excitation states in coupled superconducting qubits with fidelity up to 90.8% via parametric driving to readout resonators.
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Non-Markovian quantum Langevin analysis of simple LC and bandpass filter couplings to Josephson parametric devices yields modified gain profiles with bandwidth broadening beyond standard Markovian predictions.
The phase of the two-photon drive tunes Liouvillian exceptional points of order 2 and 3 in a cat qubit, identified by a winding-number topological invariant while preserving logical subspace fidelity.
Numerical study shows semiclassical methods reproduce overall Fock-state barrier transmission but miss quantum interference plateaus and Kerr effects, while maximum transmission remains bounded by the initial positive-energy fraction encoded in phase space.
Superconducting circuit hosts fractional fluxon states (fraxons) in a tailored Josephson potential to realize protected qudits with a STIRAP gate protocol.
citing papers explorer
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Entangling Superconducting Qubits via Energy-Selective Local Reservoirs
Programmable energy-selective local reservoirs stabilize entangled single-excitation states in coupled superconducting qubits with fidelity up to 90.8% via parametric driving to readout resonators.
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Modeling of simple bandpass filters: bandwidth broadening of Josephson parametric devices due to non-Markovian coupling to dressed transmission-line modes
Non-Markovian quantum Langevin analysis of simple LC and bandpass filter couplings to Josephson parametric devices yields modified gain profiles with bandwidth broadening beyond standard Markovian predictions.
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Controllable non-Hermitian topology in a dynamically protected cat qubit
The phase of the two-photon drive tunes Liouvillian exceptional points of order 2 and 3 in a cat qubit, identified by a winding-number topological invariant while preserving logical subspace fidelity.
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Quantum signatures and semiclassical limitations in the transmission of Fock states
Numerical study shows semiclassical methods reproduce overall Fock-state barrier transmission but miss quantum interference plateaus and Kerr effects, while maximum transmission remains bounded by the initial positive-energy fraction encoded in phase space.
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Fraxonium: Fractional fluxon states for qudit encoding
Superconducting circuit hosts fractional fluxon states (fraxons) in a tailored Josephson potential to realize protected qudits with a STIRAP gate protocol.
- Non-Gaussian Entanglement Hierarchy Based on the Schmidt Number