366 citations · 2.6k across the 30 of their papers we have counts for
15 papers · 1 filter
Fraxonium: Fractional fluxon states for qudit encoding
Luca Chirolli, Valentina Brosco, Uri Vool +2
We propose a superconducting circuit hosting low-lying states, well separated from the rest of the spectrum, that naturally realizes a qudit system protected from leakage error…
Nanoscale Electric Field Imaging with an Ambient Scanning Quantum Sensor Microscope
Ziwei Qiu, Assaf Hamo, Uri Vool +2
Nitrogen-vacancy (NV) center in diamond is a promising quantum sensor with remarkably versatile sensing capabilities. While scanning NV magnetometry is well-established, NV electro…
Nuclear Spin Assisted Magnetic Field Angle Sensing
Ziwei Qiu, Uri Vool, Assaf Hamo +1
Quantum sensing exploits the strong sensitivity of quantum systems to measure small external signals. The nitrogen-vacancy (NV) center in diamond is one of the most promising platf…
Superconducting circuit protected by two-Cooper-pair tunneling
W. C. Smith, A. Kou, X. Xiao +2
We present a protected superconducting qubit based on an effective circuit element that only allows pairs of Cooper pairs to tunnel. These dynamics give rise to a nearly degenerate…
Driving forbidden transitions in the fluxonium artificial atom
U. Vool, A. Kou, W. C. Smith +8
Atomic systems display a rich variety of quantum dynamics due to the different possible symmetries obeyed by the atoms. These symmetries result in selection rules that have been es…
Simultaneous monitoring of fluxonium qubits in a waveguide
A. Kou, W. C. Smith, U. Vool +5
Most quantum-error correcting codes assume that the decoherence of each physical qubit is independent of the decoherence of any other physical qubit. We can test the validity of th…
Schrodinger's catapult: Launching multiphoton quantum states from a microwave cavity memory
Wolfgang Pfaff, Christopher J Axline, Luke D Burkhart +6
Encoding quantum states in complex multiphoton fields can overcome loss during signal transmission in a quantum network. Transmitting quantum information encoded in this way requir…
Introduction to Quantum Electromagnetic Circuits
Uri Vool, Michel H. Devoret
The article is a short opinionated review of the quantum treatment of electromagnetic circuits, with no pretension to exhaustiveness. This review, which is an updated and modernize…
A fluxonium-based artificial molecule with a tunable magnetic moment
A. Kou, W. C. Smith, U. Vool +6
Engineered quantum systems allow us to observe phenomena that are not easily accessible naturally. The LEGO-like nature of superconducting circuits makes them particularly suited f…
Continuous quantum nondemolition measurement of the transverse component of a qubit
U. Vool, S. Shankar, S. O. Mundhada +9
Quantum jumps of a qubit are usually observed between its energy eigenstates, also known as its longitudinal pseudo-spin component. Is it possible, instead, to observe quantum jump…
Quantization of inductively-shunted superconducting circuits
W. C. Smith, A. Kou, U. Vool +4
We present a method for calculating the energy levels of superconducting circuits that contain highly anharmonic, inductively-shunted modes with arbitrarily strong coupling. Our me…
Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
Chen Wang, Yvonne Y. Gao, Ioan M. Pop +9
Superconducting circuits have attracted growing interest in recent years as a promising candidate for fault-tolerant quantum information processing. Extensive efforts have always b…
Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
Uri Vool, Ioan M. Pop, Katrina Sliwa +12
As the energy relaxation time of superconducting qubits steadily improves, non-equilibrium quasiparticle excitations above the superconducting gap emerge as an increasingly relevan…
Stabilizing entanglement autonomously between two superconducting qubits
S. Shankar, M. Hatridge, Z. Leghtas +7
Quantum error-correction codes would protect an arbitrary state of a multi-qubit register against decoherence-induced errors, but their implementation is an outstanding challenge f…
Cavity-assisted quantum bath engineering
K. W. Murch, U. Vool, D. Zhou +3
We demonstrate quantum bath engineering for a superconducting artificial atom coupled to a microwave cavity. By tailoring the spectrum of microwave photon shot noise in the cavity,…