Deterministic creation of entangled atom-light Schrödinger-cat states

Abstract

Quantum physics allows for entanglement between microscopic and macroscopic objects, described by discrete and continuous variables, respectively. As in Schrödinger's famous cat gedanken experiment, a box enclosing the objects can keep the entanglement alive. For applications in quantum information processing, however, it is essential to access the objects and manipulate them with suitable quantum tools. Here we reach this goal and deterministically generate entangled light-matter states by reflecting a coherent light pulse with up to four photons on average from an optical cavity containing one atom. The quantum light propagates freely and reaches a remote receiver for quantum state tomography. We produce a plethora of quantum states and observe negative-valued Wigner functions, a characteristic sign of non-classicality. As a first application, we demonstrate a quantum-logic gate between an atom and a light pulse, with the photonic qubit encoded in the phase of the light field.

arXiv commentincludes Methods and Supplementary Information

References in corpus (30)

• The Quantum Internet
• A computable measure of entanglement
• Continuous-variable optical quantum state tomography
• Cavity-based quantum networks with single atoms and optical photons
• Scalable photonic quantum computation through cavity-assisted interaction
• Quantum computation with optical coherent states
• Generation of a superposition of odd photon number states for quantum information networks
• Reconstruction of non-classical cavity field states with snapshots of their decoherence
• Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping
• Hybrid quantum information processing
• Efficient Quantum Computation using Coherent States
• Maximum-likelihood estimation of the density matrix
• Iterative maximum-likelihood reconstruction in quantum homodyne tomography
• Fault-tolerant linear optical quantum computing with small-amplitude coherent states
• Hardware-efficient autonomous quantum error correction
• Generation of Optical Coherent State Superpositions by Number-Resolved Photon Subtraction from Squeezed Vacuum
• Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
• Remote creation of hybrid entanglement between particle-like and wave-like optical qubits
• Entangling quantum and classical states of light
• Schrodinger cats and their power for quantum information processing
• Schrodinger's catapult: Launching multiphoton quantum states from a microwave cavity memory
• Methods for Producing Optical Coherent State Superpositions
• Heralded Storage of a Photonic Quantum Bit in a Single Atom
• Observation of quantum interference between separated mechanical oscillator wavepackets
• A scheme for quantum teleportation between discrete and continuous encodings of an optical qubit
• Quantum error correction against photon loss using multi-component cat states
• Remote preparation of continuous-variable qubits using loss-tolerant hybrid entanglement of light
• Violation of Bell-CHSH inequality using imperfect photodetectors with optical hybrid states
• Wigner-function theory and decoherence of the quantum-injected optical parametric amplifier
• Realistic loophole-free Bell test with atom-photon entanglement

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