Visualization of correlations in hybrid quantum systems
arXiv:1809.10564
Abstract
In this work we construct Wigner functions for hybrid continuous and discrete variable quantum systems. We demonstrate new capabilities in the visualization of the interactions and correlations within hybrid quantum systems. Specifically, we show how to clearly distinguish signatures that arise due to quantum and classical correlations in an entangled Bell-cat state. We further show how correlations are manifested in different types of interaction, leading to a deeper understanding of how quantum information is shared between two subsystems. Understanding the nature of the correlations between systems is central to harnessing quantum effects for information processing; the methods presented here reveal the nature of these correlations, allowing a clear visualization of the quantum information present in hybrid quantum systems. The methods presented here could be viewed as a form of quantum state spectroscopy.
arXiv comment21 pages, 7 figures, draft - major update
References in corpus (40)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Mixed State Entanglement and Quantum Error Correction
- Quantum information with continuous variables
- Classical, quantum and total correlations
- Quantifying Entanglement
- Encoding a qubit in an oscillator
- Entanglement Measures and Purification Procedures
- Negativity of the Wigner function as an indicator of nonclassicality
- Quantum computation with optical coherent states
- Contextuality supplies the magic for quantum computation
- Reconstruction of non-classical cavity field states with snapshots of their decoherence
- Hybrid quantum information processing
- A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
- Discrete phase space based on finite fields
- Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
- Increasing entanglement between Gaussian states by coherent photon subtraction
- Hybrid quantum repeater using bright coherent light
- Deterministic quantum teleportation of photonic quantum bits by a hybrid technique
- Remote creation of hybrid entanglement between particle-like and wave-like optical qubits
- Teleportation of Nonclassical Wave Packets of light
- Entangling quantum and classical states of light
- Phase-space formulation of quantum mechanics and quantum state reconstruction for physical systems with Lie-group symmetries
- Wigner Functions for Arbitrary Quantum Systems
- Optical continuous-variable qubit
- Contextuality and Wigner function negativity in qubit quantum computation
- Observation of Entanglement Between Itinerant Microwave Photons and a Superconducting Qubit
- Quantum phase space measurement and entanglement validation made easy
- Visualizing operators of coupled spin systems
- High Fidelity Teleportation of Continuous Variable Quantum States using Delocalized Single Photons
- A compact entanglement distillery
- Quasiprobability representation of quantum coherence
- A general approach to quantum mechanics as a statistical theory
- Determination of entangled quantum states of a trapped atom
- Wigner tomography of multispin quantum states
- Conditional Hybrid Nonclassicality
- Analysis of continuous and discrete Wigner approximations for spin dynamics
- Measurement of complete and continuous Wigner functions for discrete atomic systems
- Quantum correlations in composite systems
- Overcoming decoherence in the collapse and revival of spin Schrödinger cats
- Geometric representation of spin correlations and applications to ultracold systems