252 citations · 451 across the 11 of their papers we have counts for
13 papers
Syndrome-Resolved Decoding of Qubit Readout Errors
Han Zheng, Vladimir Pešić, Nikolay Gusarov +7
Readout errors in superconducting qubits include incorrect state assignment, bit flips within the computational subspace, and leakage to non-computational states. These errors requ…
Proposal for erasure conversion in integer fluxonium qubits
Jiakai Wang, Raymond A. Mencia, Vladimir E. Manucharyan +1
We propose an erasure conversion scheme on the and qubits in integer fluxonium qubits (IFQs), which are both first-order insensitive to…
Raising the Cavity Frequency in cQED
Raymond A. Mencia, Taketo Imaizumi, Igor A. Golovchanskiy +2
The basic element of circuit quantum electrodynamics (cQED) is a cavity resonator strongly coupled to a superconducting qubit. Since the inception of the field, the choice of the c…
Integer Fluxonium Qubit
Raymond A. Mencia, Wei-Ju Lin, Hyunheung Cho +2
We describe a superconducting qubit derived from operating a properly designed fluxonium circuit in a zero magnetic field. The qubit has a frequency of about 4 GHz and an energy re…
Observation of the Schmid-Bulgadaev dissipative quantum phase transition
Roman Kuzmin, Nitish Mehta, Nicholas Grabon +4
Although quantum mechanics applies to many macroscopic superconducting devices, one basic prediction remained controversial for decades. Namely, a Josephson junction connected to a…
Fluxonium Qubits in a Flip-Chip Package
Aaron Somoroff, Patrick Truitt, Adam Weis +10
The strong anharmonicity and high coherence times inherent to fluxonium superconducting circuits are beneficial for quantum information processing. In addition to requiring high-qu…
Demonstration of the Two-Fluxonium Cross-Resonance Gate
Ebru Dogan, Dario Rosenstock, Loïck Le Guevel +7
The superconducting fluxonium qubit has a great potential for high-fidelity quantum gates with its long coherence times and strong anharmonicity at the half flux quantum sweet spot…
Millisecond coherence in a superconducting qubit
Aaron Somoroff, Quentin Ficheux, Raymond A. Mencia +3
Increasing the degree of control over physical qubits is a crucial component of quantum computing research. We report a superconducting qubit of fluxonium type with the Ramsey cohe…
Superconducting TiN films grown by directional reactive evaporation
Raymond Mencia, Yen-Hsiang Lin, Vladimir Manucharyan
We report a novel method of growing strongly-disordered superconducting titanium nitride (TiN) thin films by reactive electron-beam deposition. The normal state sheet resistance an…
The superconducting quasicharge qubit
Ivan V. Pechenezhskiy, Raymond A. Mencia, Long B. Nguyen +2
The non-dissipative non-linearity of a Josephson junction converts macroscopic superconducting circuits into artificial atoms, enabling some of the best controlled quantum bits (qu…
The high-coherence fluxonium qubit
Long B. Nguyen, Yen-Hsiang Lin, Aaron Somoroff +3
We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T2 > 100 microseconds (T2 > 300 microseconds in one…
Superstrong coupling in circuit quantum electrodynamics
Roman Kuzmin, Nitish Mehta, Nicholas Grabon +2
Vacuum fluctuations fundamentally affect an atom by inducing a finite excited state lifetime along with a Lamb shift of its transition frequency. Here we report the reverse effect:…
Quantum electrodynamics of a superconductor-insulator phase transition
Roman Kuzmin, Raymond Mencia, Nicholas Grabon +3
A chain of Josephson junctions implements one of the simplest many-body models undergoing a superconductor-insulator (SI) quantum phase transition between states with zero and infi…