295 citations · 1.3k across the 16 of their papers we have counts for
16 papers
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…
Loss channels affecting lithium niobate phononic crystal resonators at cryogenic temperature
E. Alex Wollack, Agnetta Y. Cleland, Patricio Arrangoiz-Arriola +6
We investigate the performance of microwave-frequency phononic crystal resonators fabricated on thin-film lithium niobate for integration with superconducting quantum circuits. For…
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…
Lithium Niobate Piezo-optomechanical Crystals
Wentao Jiang, Rishi N. Patel, Felix M. Mayor +6
Demonstrating a device that efficiently connects light, motion, and microwaves is an outstanding challenge in classical and quantum photonics. We make significant progress in this…
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…
High-Q photonic resonators and electro-optic coupling using silicon-on-lithium-niobate
Jeremy D. Witmer, Joseph A. Valery, Patricio Arrangoiz-Arriola +3
Future quantum networks in which superconducting quantum processors are connected via optical links, will require microwave-to-optical photon converters that preserve entanglement.…
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…