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Stabilizing the Laughlin state of light: dynamics of hole fractionalization
Pavel D. Kurilovich, Vladislav D. Kurilovich, José Lebreuilly +1
Particle loss is the ultimate challenge for preparation of strongly correlated many-body states of photons. An established way to overcome the loss is to employ a stabilization set…
Signatures of quantum phase transitions in the dynamic response of fluxonium qubit chains
Hendrik Meier, R. T. Brierley, Angela Kou +2
We evaluate the microwave admittance of a one-dimensional chain of fluxonium qubits coupled by shared inductors. Despite its simplicity, this system exhibits a rich phase diagram.…
Decoherence of superconducting qubits caused by quasiparticle tunneling
G. Catelani, Simon E. Nigg, S. M. Girvin +2
In superconducting qubits, the interaction of the qubit degree of freedom with quasiparticles defines a fundamental limitation for the qubit coherence. We develop a theory of the p…
Nonlinear oscillators and high fidelity qubit state measurement in circuit quantum electrodynamics
Eran Ginossar, Lev S. Bishop, S. M. Girvin
In this book chapter we analyze the high excitation nonlinear response of the Jaynes-Cummings model in quantum optics when the qubit and cavity are strongly coupled. We focus on th…
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…
Single-photon Optomechanics
A. Nunnenkamp, K. Borkje, S. M. Girvin
Optomechanics experiments are rapidly approaching the regime where the radiation pressure of a single photon displaces the mechanical oscillator by more than its zero-point uncerta…
Implementing optimal control pulse shaping for improved single-qubit gates
J. M. Chow, L. DiCarlo, J. M. Gambetta +4
We employ pulse shaping to abate single-qubit gate errors arising from the weak anharmonicity of transmon superconducting qubits. By applying shaped pulses to both quadratures of r…
Protocol for high fidelity readout in the photon blockade regime of circuit QED
E. Ginossar, Lev S. Bishop, D. I. Schuster +1
The driven-damped Jaynes-Cummings model in the regime of strong coupling is found to exhibit a coexistence between the quantum photon blockaded state and a quasi-coherent bright st…
Preparation and Measurement of Three-Qubit Entanglement in a Superconducting Circuit
L. DiCarlo, M. D. Reed, L. Sun +7
Traditionally, quantum entanglement has played a central role in foundational discussions of quantum mechanics. The measurement of correlations between entangled particles can exhi…
Quantum Non-demolition Detection of Single Microwave Photons in a Circuit
B. R. Johnson, M. D. Reed, A. A. Houck +8
Thorough control of quantum measurement is key to the development of quantum information technologies. Many measurements are destructive, removing more information from the system…
Phase preserving amplification near the quantum limit with a Josephson Ring Modulator
N. Bergeal, F. Schackert, M. Metcalfe +7
Recent progress in solid state quantum information processing has stimulated the search for ultra-low-noise amplifiers and frequency converters in the microwave frequency range, wh…
Optomechanics (a brief review)
Florian Marquardt, S. M. Girvin
We review the emerging field of optomechanics, where the radiation pressure of light circulating inside an optical cavity is employed to cool, manipulate and read out micro- and na…
Quantum Noise Interference and Back-action Cooling in Cavity Nanomechanics
Florian Elste, S. M. Girvin, A. A. Clerk
We present a theoretical analysis of a novel cavity electromechanical system where a mechanical resonator directly modulates the damping rate kappa of a driven electromagnetic cavi…
Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
L. DiCarlo, J. M. Chow, J. M. Gambetta +8
By harnessing the superposition and entanglement of physical states, quantum computers could outperform their classical counterparts in solving problems of technological impact, su…
Proposal for generating and detecting multi-qubit GHZ states in circuit QED
Lev S. Bishop, L. Tornberg, D. Price +8
We propose methods for the preparation and entanglement detection of multi-qubit GHZ states in circuit quantum electrodynamics. Using quantum trajectory simulations appropriate for…
Life after charge noise: recent results with transmon qubits
A. A. Houck, Jens Koch, M. H. Devoret +2
We review the main theoretical and experimental results for the transmon, a superconducting charge qubit derived from the Cooper pair box. The increased ratio of the Josephson to c…
Randomized benchmarking and process tomography for gate errors in a solid-state qubit
J. M. Chow, J. M. Gambetta, L. Tornberg +7
We present measurements of single-qubit gate errors for a superconducting qubit. Results from quantum process tomography and randomized benchmarking are compared with gate errors o…
Introduction to Quantum Noise, Measurement and Amplification
A. A. Clerk, M. H. Devoret, S. M. Girvin +2
The topic of quantum noise has become extremely timely due to the rise of quantum information physics and the resulting interchange of ideas between the condensed matter and AMO/qu…
Nonlinear response of the vacuum Rabi resonance
Lev S. Bishop, J. M. Chow, Jens Koch +5
On the level of single atoms and photons, the coupling between atoms and the electromagnetic field is typically very weak. By employing a cavity to confine the field, the strength…
Analog information processing at the quantum limit with a Josephson ring modulator
N. Bergeal, R. Vijay, V. E. Manucharyan +4
Amplifiers are crucial in every experiment carrying out a very sensitive measurement. However, they always degrade the information by adding noise. Quantum mechanics puts a limit o…
Controlling the spontaneous emission of a superconducting transmon qubit
A. A. Houck, J. A. Schreier, B. R. Johnson +8
We present a detailed characterization of coherence in seven transmon qubits in a circuit QED architecture. We find that spontaneous emission rates are strongly influenced by far o…
Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
J. A. Schreier, A. A. Houck, Jens Koch +9
We present an experimental realization of the transmon qubit, an improved superconducting charge qubit derived from the Cooper pair box. We experimentally verify the predicted expo…
Coupling Superconducting Qubits via a Cavity Bus
J. Majer, J. M. Chow, J. M. Gambetta +11
Superconducting circuits are promising candidates for constructing quantum bits (qubits) in a quantum computer; single-qubit operations are now routine, and several examples of two…
Quantum trajectory approach to circuit QED: Quantum jumps and the Zeno effect
Jay Gambetta, Alexandre Blais, M. Boissonneault +3
We present a theoretical study of a superconducting charge qubit dispersively coupled to a transmission line resonator. Starting from a master equation description of this coupled…