Hybrid discrete-and continuous-variable quantum information
Research in quantum information processing has followed two different directions: the use of
discrete variables (qubits) and that of high-dimensional, continuous-variable Gaussian …
discrete variables (qubits) and that of high-dimensional, continuous-variable Gaussian …
Modes and states in quantum optics
A few decades ago, quantum optics stood out as a new domain of physics by exhibiting
states of light with no classical equivalent. The first investigations concerned single photons …
states of light with no classical equivalent. The first investigations concerned single photons …
Remote generation of magnon Schrödinger cat state via magnon-photon entanglement
The magnon cat state represents a macroscopic quantum superposition of collective
magnetic excitations of large number spins that not only provides fundamental tests of …
magnetic excitations of large number spins that not only provides fundamental tests of …
Non-Gaussian quantum states and where to find them
M Walschaers - PRX quantum, 2021 - APS
Gaussian states have played an important role in the physics of continuous-variable
quantum systems. They are appealing for the experimental ease with which they can be …
quantum systems. They are appealing for the experimental ease with which they can be …
Linear optical quantum computing with photonic qubits
Linear optics with photon counting is a prominent candidate for practical quantum
computing. The protocol by Knill, Laflamme, and Milburn [2001, Nature (London) 409, 46] …
computing. The protocol by Knill, Laflamme, and Milburn [2001, Nature (London) 409, 46] …
Quantum interface between light and atomic ensembles
During the past decade the interaction of light with multiatom ensembles has attracted much
attention as a basic building block for quantum information processing and quantum state …
attention as a basic building block for quantum information processing and quantum state …
Continuous-variable optical quantum-state tomography
This review covers the latest developments in continuous-variable quantum-state
tomography of optical fields and photons, placing a special emphasis on its practical aspects …
tomography of optical fields and photons, placing a special emphasis on its practical aspects …
Generating optical Schrodinger kittens for quantum information processing
We present a detailed experimental analysis of a free-propagating light pulse prepared in a
“Schrödinger kitten” state, which is defined as a quantum superposition of “classical” …
“Schrödinger kitten” state, which is defined as a quantum superposition of “classical” …
Non-Gaussian quantum states of a multimode light field
Advanced quantum technologies require scalable and controllable quantum resources,.
Gaussian states of multimode light, such as squeezed states and cluster states, are scalable …
Gaussian states of multimode light, such as squeezed states and cluster states, are scalable …
Generation of a superposition of odd photon number states for quantum information networks
We report on the experimental observation of quantum-network-compatible light described
by a nonpositive Wigner function. The state is generated by photon subtraction from a …
by a nonpositive Wigner function. The state is generated by photon subtraction from a …