A photonic transistor that can switch or amplify an optical signal with a single gate photon
requires strong non-linear interaction at the single-photon level. Circuit quantum …

In circuit and cavity quantum electrodynamics devices where control qubits are dispersively
coupled to high-quality-factor cavities, characteristic functions of cavity states can be directly …

The Greenberger-Horne-Zeilinger (GHZ) state is a key resource for quantum information
processing and quantum metrology. The atomic GHZ state can be generated by one-axis …

Entangled coherent states play pivotal roles in various fields such as quantum computation,
quantum communication, and quantum sensing. We experimentally demonstrate the …

A non-classical light source is essential for implementing a wide range of quantum
information processing protocols, including quantum computing, networking, communication …

A classical switch or router determines which of several inputs to the device passes through
the output. In analogy, a quantum switch that coherently links the input to a superposition of …

Quantum state preparation and measurement of photonic and phononic Schrödinger cat
states have gathered significant interest due to their implications for alternative encoding …

Generalized cat states represent arbitrary superpositions of coherent states, which are of
great importance in various quantum information processing protocols. Here we …

Non-Gaussian quantum states are crucial to fault-tolerant quantum computation with
continuous-variable systems. Usually, generation of such states involves trade-offs between …

Typically, multipartite entangled coherent states are difficult to be extended and produced
without measurement. We here propose a way to deterministically generate a GHZ …