Publications (22)
Josephson Amplifier for Qubit Readout
Baleegh Abdo, Flavius Schackert, Michael Hatridge +2
We report on measurements of a Josephson amplifier (J-amp) suitable for quantum-state qubit readout in the microwave domain. It consists of two microstrip resonators which intersec…
Black-box superconducting circuit quantization
Simon E. Nigg, Hanhee Paik, Brian Vlastakis +6
We present a semi-classical method for determining the effective low-energy quantum Hamiltonian of weakly anharmonic superconducting circuits containing mesoscopic Josephson juncti…
Protocol for universal gates in optimally biased superconducting qubits
Chad Rigetti, Michel Devoret
We present a new experimental protocol for performing universal gates in a register of superconducting qubits coupled by fixed on-chip linear reactances. The qubits have fixed, det…
Exponential quantum enhancement for distributed addition with local nonlinearity
Adam Henry Marblestone, Michel Devoret
We consider classical and entanglement-assisted versions of a distributed computation scheme that computes nonlinear Boolean functions of a set of input bits supplied by separated…
Quantum-Classical Separation in Bounded-Resource Tasks Arising from Measurement Contextuality
Shashwat Kumar, Eliott Rosenberg, Alejandro Grajales Dau +280
The prevailing view is that quantum phenomena can be harnessed to tackle certain problems beyond the reach of classical approaches. Quantifying this capability as a quantum-classic…
Signal-to-pump back-action and self-oscillation in Double-Pump Josephson Parametric Amplifier
Archana Kamal, Adam Marblestone, Michel Devoret
We present the theory of a Josephson parametric amplifier employing two pump sources. Our calculations are based on Input-Output Theory, and can easily be generalized to any couple…