295 citations · 1.3k across the 16 of their papers we have counts for
13 papers · 1 filter
Preserving phase coherence and linearity in cat qubits with exponential bit-flip suppression
Harald Putterman, Kyungjoo Noh, Rishi N. Patel +17
Cat qubits, a type of bosonic qubit encoded in a harmonic oscillator, can exhibit an exponential noise bias against bit-flip errors with increasing mean photon number. Here, we foc…
Hardware-efficient quantum error correction via concatenated bosonic qubits
Harald Putterman, Kyungjoo Noh, Connor T. Hann +118
In order to solve problems of practical importance, quantum computers will likely need to incorporate quantum error correction, where a logical qubit is redundantly encoded in many…
Strong dispersive coupling between a mechanical resonator and a fluxonium superconducting qubit
Nathan R. A. Lee, Yudan Guo, Agnetta Y. Cleland +10
We demonstrate strong dispersive coupling between a fluxonium superconducting qubit and a 690 megahertz mechanical oscillator, extending the reach of circuit quantum acousto-dynami…
Quantum state preparation, tomography, and entanglement of mechanical oscillators
E. Alex Wollack, Agnetta Y. Cleland, Rachel G. Gruenke +3
Precisely engineered mechanical oscillators keep time, filter signals, and sense motion, making them an indispensable part of today's technological landscape. These unique capabili…
Building a fault-tolerant quantum computer using concatenated cat codes
Christopher Chamberland, Kyungjoo Noh, Patricio Arrangoiz-Arriola +13
We present a comprehensive architectural analysis for a proposed fault-tolerant quantum computer based on cat codes concatenated with outer quantum error-correcting codes. For the…
Cryogenic microwave-to-optical conversion using a triply-resonant lithium niobate on sapphire transducer
Timothy P. McKenna, Jeremy D. Witmer, Rishi N. Patel +6
Quantum networks are likely to have a profound impact on the way we compute and communicate in the future. In order to wire together superconducting quantum processors over kilomet…
A silicon-organic hybrid platform for quantum microwave-to-optical transduction
Jeremy D. Witmer, Timothy P. McKenna, Patricio Arrangoiz-Arriola +6
Low-loss fiber optic links have the potential to connect superconducting quantum processors together over long distances to form large scale quantum networks. A key component of th…
Electric fields for light: Propagation of microwave photons along a synthetic dimension
Nathan R. A. Lee, Marek Pechal, E. Alex Wollack +3
The evenly-spaced modes of an electromagnetic resonator are coupled to each other by appropriate time-modulation, leading to dynamics analogous to those of particles hopping betwee…
Resolving the energy levels of a nanomechanical oscillator
Patricio Arrangoiz-Arriola, E. Alex Wollack, Zhaoyou Wang +5
The coherent states that describe the classical motion of a mechanical oscillator do not have well-defined energy, but are rather quantum superpositions of equally-spaced energy ei…
Quantum dynamics of a few-photon parametric oscillator
Zhaoyou Wang, Marek Pechal, E. Alex Wollack +4
Modulating the frequency of a harmonic oscillator at nearly twice its natural frequency leads to amplification and self-oscillation. Above the oscillation threshold, the field sett…
Superconducting circuit quantum computing with nanomechanical resonators as storage
Marek Pechal, Patricio Arrangoiz-Arriola, Amir H. Safavi-Naeini
We analyze the quantum information processing capability of a superconducting transmon circuit used to mediate interactions between quantum information stored in a collection of ph…
Coupling a superconducting quantum circuit to a phononic crystal defect cavity
Patricio Arrangoiz-Arriola, E. Alex Wollack, Marek Pechal +3
Connecting nanoscale mechanical resonators to microwave quantum circuits opens new avenues for storing, processing, and transmitting quantum information. In this work, we couple a…
Prospects for quantum acoustics with phononic crystal devices
Patricio Arrangoiz-Arriola, Amir H. Safavi-Naeini
Nanomechanical systems made from phononic crystals can act as highly coherent microwave-frequency circuits at cryogenic temperatures. However, generating sufficient coupling betwee…