Realizing a large-scale quantum computer requires hardware platforms that can
simultaneously achieve universality, scalability, and fault tolerance. As a viable pathway to …

To harness the potential of a quantum computer, quantum information must be protected
against error by encoding it into a logical state that is suitable for quantum error correction …

Photonic quantum computing is one of the leading approaches to universal quantum
computation. However, large-scale implementation of photonic quantum computing has …

Controllable quantum devices open novel directions to both quantum computation and
quantum simulation. Recently, a problem known as boson sampling has been shown to …

We develop a resource theory for continuous-variable systems grounded on operations
routinely available within current quantum technologies. In particular, the set of free …

Encoding a qubit in the continuous degrees of freedom of an oscillator is a promising path to
error-corrected quantum computation. One advantageous way to achieve this is through …

Measurement-based quantum computation with optical time-domain multiplexing is a
promising method to realize a quantum computer from the viewpoint of scalability. Fault …

We propose a high-rate generation method of optical Schrödinger cat states. Thus far,
photon subtraction from squeezed vacuum states has been a standard method in cat-state …

The generation of a logical qubit called the Gottesman-Kitaev-Preskill (GKP) qubit in an
optical traveling wave is a major challenge for realizing large-scale universal fault-tolerant …

We propose and experimentally realize a novel versatile protocol that allows the quantum
state engineering of heralded optical coherent-state superpositions. This scheme relies on a …