Flow of quantum correlations in noisy two-mode squeezed microwave states
- URL: http://arxiv.org/abs/2207.06090v1
- Date: Wed, 13 Jul 2022 09:59:52 GMT
- Title: Flow of quantum correlations in noisy two-mode squeezed microwave states
- Authors: M. Renger, S. Pogorzalek, F. Fesquet, K. Honasoge, F. Kronowetter, Q.
Chen, Y. Nojiri, K. Inomata, Y. Nakamura, A. Marx, F. Deppe, R. Gross, K. G.
Fedorov
- Abstract summary: We study nonclassical correlations in propagating two-mode squeezed microwave states in the presence of noise.
We focus on two different types of correlations, namely, quantum entanglement and quantum discord.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study nonclassical correlations in propagating two-mode squeezed microwave
states in the presence of noise. We focus on two different types of
correlations, namely, quantum entanglement and quantum discord. Quantum discord
has various intriguing fundamental properties which require experimental
verification, such as the asymptotic robustness to environmental noise. Here,
we experimentally investigate quantum discord in propagating two-mode squeezed
microwave states generated via superconducting Josephson parametric amplifiers.
By exploiting an asymmetric noise injection into these entangled states, we
demonstrate the robustness of quantum discord against thermal noise while
verifying the sudden death of entanglement. Furthermore, we investigate the
difference between quantum discord and entanglement of formation, which can be
directly related to the flow of locally inaccessible information between the
environment and the bipartite subsystem. We observe a crossover behavior
between quantum discord and entanglement for low noise photon numbers, which is
a result of the tripartite nature of noise injection. We demonstrate that the
difference between entanglement and quantum discord can be related to the
security of certain quantum key distribution protocols.
Related papers
- The multimode conditional quantum Entropy Power Inequality and the squashed entanglement of the extreme multimode bosonic Gaussian channels [53.253900735220796]
Inequality determines the minimum conditional von Neumann entropy of the output of the most general linear mixing of bosonic quantum modes.
Bosonic quantum systems constitute the mathematical model for the electromagnetic radiation in the quantum regime.
arXiv Detail & Related papers (2024-10-18T13:59:50Z) - Quantum error mitigation for Fourier moment computation [49.1574468325115]
This paper focuses on the computation of Fourier moments within the context of a nuclear effective field theory on superconducting quantum hardware.
The study integrates echo verification and noise renormalization into Hadamard tests using control reversal gates.
The analysis, conducted using noise models, reveals a significant reduction in noise strength by two orders of magnitude.
arXiv Detail & Related papers (2024-01-23T19:10:24Z) - Quantifying quantum correlations in noisy Gaussian channels [0.0]
We describe a scheme that aims to specify and examine the dynamic evolution of the quantum correlations in two-modes Gaussian states.
We show that the Gaussian interferometric power is a measurement quantifier that can capture the essential quantum correlations beyond quantum entanglement.
arXiv Detail & Related papers (2022-07-26T11:34:35Z) - Detecting and Eliminating Quantum Noise of Quantum Measurements [3.871198861387443]
We first detect and then eliminate quantum noise so that the classical noise assumption is satisfied.
We demonstrate the feasibility of the two-stage procedure numerically on Baidu Quantum Platform.
Remarkably, the results show that quantum noise in measurement devices is significantly suppressed, and the quantum accuracy is substantially improved.
arXiv Detail & Related papers (2022-06-28T03:58:10Z) - Learning Noise via Dynamical Decoupling of Entangled Qubits [49.38020717064383]
Noise in entangled quantum systems is difficult to characterize due to many-body effects involving multiple degrees of freedom.
We develop and apply multi-qubit dynamical decoupling sequences that characterize noise that occurs during two-qubit gates.
arXiv Detail & Related papers (2022-01-26T20:22:38Z) - Quantum steering and quantum discord under noisy channels and
entanglement swapping [0.0]
Quantum entanglement, discord, and EPR-steering are valuable resources for fuelling quantum information-theoretic protocols.
EPR-steering is more general than Bell-nonlocality and yet more restrictive than entanglement.
Quantum discord on the other hand, captures non-classical behaviour beyond that of entanglement.
arXiv Detail & Related papers (2021-12-18T23:52:13Z) - Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator.
We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
arXiv Detail & Related papers (2021-07-23T07:30:57Z) - Enhancing nonclassical bosonic correlations in a Quantum Walk network
through experimental control of disorder [50.591267188664666]
We experimentally realize a controllable inhomogenous Quantum Walk dynamics.
We observe two photon states which exhibit an enhancement in the quantum correlations between two modes of the network.
arXiv Detail & Related papers (2021-02-09T10:57:00Z) - Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide.
Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
arXiv Detail & Related papers (2020-11-24T07:06:36Z) - Robustness of Measurement-Induced Correlations Under Decoherence Effect [0.0]
We study the dynamics of quantum correlation measures such as entanglement and measurement-induced nonlocality (MIN)
It is observed that all the noises cause sudden death of entanglement for partially entangled states.
We show the existence of separable quantum states with non-zero quantum correlations in terms of MIN.
arXiv Detail & Related papers (2020-04-10T16:54:10Z) - Simulating the effect of weak measurements by a phase damping channel
and determining different measures of bipartite correlations in nuclear
magnetic resonance [4.533054121858426]
Quantum discord is a measure based on local projective measurements which captures quantum correlations that may not be fully captured by entanglement.
We experimentally observed two weak variants of quantum discord namely, super quantum discord and weak quantum discord, in two-qubit Werner and Bell-diagonal states.
arXiv Detail & Related papers (2020-04-02T19:32:36Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.