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 …

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 …

Hybridizing different degrees of freedom or physical platforms potentially offers various
advantages in building scalable quantum architectures. Here, we introduce a fault-tolerant …

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 …

In this paper, we study the Schrödinger cat state transfer in a quantum optical version of
Newton's cradle in a non-Markovian environment. Based on a non-Markovian master …

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 …

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

We envisage many-body systems described by quantum spin-chain Hamiltonians featuring
a trivial separable eigenstate. For generic Hamiltonians, such a state represents a quantum …