Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer

  title={Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer},
  author={J{\'e}r{\^o}me Bourassa and Rafael N. Alexander and Michael Vasmer and Ashlesha Patil and Ilan Tzitrin and Takaya Matsuura and Daiqin Su and Ben Q. Baragiola and Saikat Guha and G. William Dauphinais and Krishna Kumar Sabapathy and Nicolas C. Menicucci and Ish Dhand},
Photonics is the platform of choice to build a modular, easy-to-network quantum computer operating at room temperature. However, no concrete architecture has been presented so far that exploits both the advantages of qubits encoded into states of light and the modern tools for their generation. Here we propose such a design for a scalable and fault-tolerant photonic quantum computer informed by the latest developments in theory and technology. Central to our architecture is the generation and… Expand
Fusion-based quantum computation
We introduce fusion-based quantum computing (FBQC) a model of universal quantum computation in which entangling measurements, called fusions, are performed on the qubits of small constant-sizedExpand
Harnessing the Power of the Second Quantum Revolution
The second quantum revolution has been built on a foundation of fundamental research at the intersection of physics and information science, giving rise to the discipline we now call QuantumExpand
Classification and reconstruction of optical quantum states with deep neural networks
Deep-neural-network-based techniques are applied to quantum state classification and reconstruction and it is shown that a CNN trained on noisy inputs can learn to identify the most important regions in the data, which potentially can reduce the cost of tomography by guiding adaptive data collection. Expand
Precisely determining photon-number in real-time
Leonardo Assis Morais, Till Weinhold, Marcelo P. de Almeida, Adriana Lita, Thomas Gerrits, Sae Woo Nam, Andrew G. White, and Geoff Gillett Centre for Engineered Quantum Systems, School of MathematicsExpand
Linear and continuous variable spin-wave processing using a cavity-coupled atomic ensemble
Spin-wave excitations in ensembles of atoms are gaining attention as a quantum information resource. However, current techniques with atomic spin waves do not achieve universal quantum informationExpand
Fault-tolerant quantum computation with static linear optics
Ilan Tzitrin, 2, ∗ Takaya Matsuura, 3, ∗ Rafael N. Alexander, 4, 5, ∗ Guillaume Dauphinais, J. Eli Bourassa, 2 Krishna K. Sabapathy, Nicolas C. Menicucci, 4 and Ish Dhand Xanadu, Toronto, ON, M5GExpand
Hidden qubit cluster states
Continuous-variable cluster states (CVCSs) can be supplemented with Gottesman-Kitaev-Preskill (GKP) states to form a hybrid cluster state with the power to execute universal, fault-tolerant quantumExpand
A Noise-Aware Qubit Mapping Algorithm Evaluated via Qubit Interaction-Graph Criteria
Matthew Steinberg, Sebastian Feld, Carmen G. Almudever, Michael Marthaler, and Jan-Michael Reiner QuTech, Delft University of Technology, Delft, the Netherlands Quantum and Computer EngineeringExpand
All-optical cat-code quantum error correction
The cat code is a promising encoding scheme for bosonic quantum error correction as it allows for correction against losses—the dominant error mechanism in most bosonic systems. However, for lossesExpand
Fault-Tolerant Continuous-Variable Measurement-based Quantum Computation Architecture
Mikkel V. Larsen, ∗ Christopher Chamberland, 3 Kyungjoo Noh, 3 Jonas S. Neergaard-Nielsen, and Ulrik L. Andersen † Center for Macroscopic Quantum States (bigQ), Department of Physics, TechnicalExpand


Why I am optimistic about the silicon-photonic route to quantum computing
This is a short overview explaining how building a large-scale, silicon-photonic quantum computer has been reduced to the creation of good sources of 3-photon entangled states (and may simplifyExpand
Production of photonic universal quantum gates enhanced by machine learning
We introduce photonic architectures for universal quantum computation. The first step is to produce a resource state which is a superposition of the first four Fock states with a probability $\geqExpand
Encoding qubits into oscillators with atomic ensembles and squeezed light
The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator provides a number of advantages when used in a fault-tolerant architecture for quantum computing, most notably thatExpand
Deterministic generation of a two-dimensional cluster state
A scalable scheme for the generation of photonic cluster states suitable for universal measurement-based quantum computation is proposed and a demonstrated source of two-dimensional cluster states can be combined with quantum error correction to enable fault-tolerant quantum computation. Expand
Quantum computing with multidimensional continuous-variable cluster states in a scalable photonic platform
This work bridges two distinct fields---Kerr microcombs and continuous-variable (CV) quantum information---to formulate a one-way quantum computing architecture based on programmable large-scale CV cluster states that can accommodate hundreds of simultaneously addressable entangled optical modes multiplexed in the frequency domain and an unlimited number of sequentially addressable entangling optical modes in time domain. Expand
Generation of time-domain-multiplexed two-dimensional cluster state
Generating a large-scale two-dimensional continuous-variable cluster state that is compatible with Bosonic error-correcting codes that enable fault-tolerant quantum computation and readily scalable and fault tolerant. Expand
Fault-tolerant quantum computation with nondeterministic entangling gates
Performing entangling gates between physical qubits is necessary for building a large-scale universal quantum computer, but in some physical implementations - for example, those that are based onExpand
All-optical generation of states for "Encoding a qubit in an oscillator".
This work proposes the generation of an approximate GKP state by using superpositions of optical coherent states, squeezing, linear optical devices, and homodyne detection. Expand
Dynamically protected cat-qubits: a new paradigm for universal quantum computation
We present a new hardware-efficient paradigm for universal quantum computation which is based on encoding, protecting and manipulating quantum information in a quantum harmonic oscillator. ThisExpand
High-threshold fault-tolerant quantum computation with the GKP qubit and realistically noisy devices
To implement fault-tolerant quantum computation with continuous variables, continuous variables need to be digitized using an appropriate code such as the Gottesman--Kitaev--Preskill (GKP) qubit. WeExpand