Stefano Poletto
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View article: Demonstrating real-time and low-latency quantum error correction with superconducting qubits
Demonstrating real-time and low-latency quantum error correction with superconducting qubits Open
Data associated with results presented in "Demonstrating real-time and low-latency quantum error correction with superconducting qubits". HDF5 files include raw data collected during experiments. Datasets for experiments performed with dif…
View article: Precision frequency tuning of tunable transmon qubits using alternating-bias assisted annealing
Precision frequency tuning of tunable transmon qubits using alternating-bias assisted annealing Open
Superconducting quantum processors are one of the leading platforms for realizing scalable fault-tolerant quantum computation (FTQC). The recent demonstration of post-fabrication tuning of Josephson junctions using alternating-bias assiste…
View article: Coherent control of a superconducting qubit using light
Coherent control of a superconducting qubit using light Open
Quantum communications technologies require a network of quantum processors connected with low loss and low noise communication channels capable of distributing entangled states. Superconducting microwave qubits operating in cryogenic envi…
View article: Modular Superconducting Qubit Architecture with a Multi-chip Tunable Coupler
Modular Superconducting Qubit Architecture with a Multi-chip Tunable Coupler Open
We use a floating tunable coupler to mediate interactions between qubits on separate chips to build a modular architecture. We demonstrate three different designs of multi-chip tunable couplers using vacuum gap capacitors or superconductin…
View article: Full control of superconducting qubits with combined on-chip microwave and flux lines
Full control of superconducting qubits with combined on-chip microwave and flux lines Open
As the field of quantum computing progresses to larger-scale devices, multiplexing will be crucial to scale quantum processors. While multiplexed readout is common practice for superconducting devices, relatively little work has been repor…
View article: Parametric-Resonance Entangling Gates with a Tunable Coupler
Parametric-Resonance Entangling Gates with a Tunable Coupler Open
High-fidelity parametric gates have been demonstrated with superconducting qubits via rf flux modulation of the qubit frequency. The modulation however leads to renormalization of the bare qubit-qubit coupling, thereby reducing the gate sp…
View article: Full control of superconducting qubits with combined on-chip microwave and flux lines
Full control of superconducting qubits with combined on-chip microwave and flux lines Open
As the field of quantum computing progresses to larger-scale devices, multiplexing will be crucial to scale quantum processors. While multiplexed readout is common practice for superconducting devices, relatively little work has been repor…
View article: Manufacturing low dissipation superconducting quantum processors
Manufacturing low dissipation superconducting quantum processors Open
Enabling applications for solid state quantum technology will require systematically reducing noise, particularly dissipation, in these systems. Yet, when multiple decay channels are present in a system with similar weight, resolution to d…
View article: General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED
General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED Open
We present and demonstrate a general three-step method for extracting the quantum efficiency of dispersive qubit readout in circuit QED. We use active depletion of post-measurement photons and optimal integration weight functions on two qu…
View article: Correction: Corrigendum: Independent, extensible control of same-frequency superconducting qubits by selective broadcasting
Correction: Corrigendum: Independent, extensible control of same-frequency superconducting qubits by selective broadcasting Open
Correction to: npj Quantum Information (2016) 2, 16029. doi:10.1038/npjqi.2016.29; published online 23 August 2016 The original version of this Article contained an error in one of the calculations within the Results section. Although the …
View article: Scalable Quantum Circuit and Control for a Superconducting Surface Code
Scalable Quantum Circuit and Control for a Superconducting Surface Code Open
We present a scalable scheme for executing the error-correction cycle of a\nmonolithic surface-code fabric composed of fast-flux-tuneable transmon qubits\nwith nearest-neighbor coupling. An eight-qubit unit cell forms the basis for\nrepeat…
View article: Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits
Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits Open
Since the very first experiments, superconducting circuits have suffered from strong coupling to environmental noise, destroying quantum coherence and degrading performance. In state-of-the-art experiments, it is found that the relaxation …
View article: Detecting bit-flip errors in a logical qubit using stabilizer measurements
Detecting bit-flip errors in a logical qubit using stabilizer measurements Open
Quantum data are susceptible to decoherence induced by the environment and to errors in the hardware processing it. A future fault-tolerant quantum computer will use quantum error correction to actively protect against both. In the smalles…