Since the first observation of coherent quantum behaviour in a superconducting qubit, now
more than 20 years ago, there have been substantial developments in the field of …

Quantum information processing relies on the precise control of non-classical states in the
presence of many uncontrolled environmental degrees of freedom. The interactions …

Performing large calculations with a quantum computer will likely require a fault-tolerant
architecture based on quantum error-correcting codes. The challenge is to design practical …

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 …

Quantum superpositions of macroscopically distinct classical states—so-called Schrödinger
cat states—are a resource for quantum metrology, quantum communication and quantum …

Executing quantum algorithms on error-corrected logical qubits is a critical step for scalable
quantum computing, but the requisite numbers of qubits and physical error rates are …

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 …

Noise is the central obstacle to building large-scale quantum computers. Quantum systems
with sufficiently uncorrelated and weak noise could be used to solve computational …

The unique features of quantum theory offer a powerful new paradigm for information
processing. Translating these mathematical abstractions into useful algorithms and …

Quantum states are very delicate, so it is likely some sort of quantum error correction will be
necessary to build reliable quantum computers. The theory of quantum error-correcting …