Computable steering criterion for bipartite quantum systems
- URL: http://arxiv.org/abs/2010.01902v1
- Date: Fri, 2 Oct 2020 03:58:28 GMT
- Title: Computable steering criterion for bipartite quantum systems
- Authors: Guo-Zhu Pan, Jun-Long Zhao, Zhi Lin, Ming Yang, Gang Zhang, and
Zhuo-Liang Cao
- Abstract summary: Quantum steering describes the ability of one observer to nonlocally affect the other observer's state through local measurements.
We propose a computable steering criterion that is applicable to bipartite quantum systems of arbitrary dimensions.
- Score: 8.812233192854949
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum steering describes the ability of one observer to nonlocally affect
the other observer's state through local measurements, which represents a new
form of quantum nonlocal correlation and has potential applications in quantum
information and quantum communication. In this paper, we propose a computable
steering criterion that is applicable to bipartite quantum systems of arbitrary
dimensions. The criterion can be used to verify a wide range of steerable
states directly from a given density matrix without constructing measurement
settings. Compared with the existing steering criteria, it is readily
computable and testable in experiment, which can also be used to verify
entanglement as all steerable quantum states are entangled.
Related papers
- Detection of mode-intrinsic quantum entanglement [0.0]
We propose a witness to detect a strong form of entanglement that only non-Gaussian states possess.
The strength of our witness is two-fold: it only requires measurements in one basis to check entanglement in any arbitrary mode basis.
arXiv Detail & Related papers (2024-07-25T15:01:47Z) - Witnessing network steerability of every bipartite entangled state without inputs [0.0]
We consider quantum networks and focus on the swap-steering scenario without inputs.
We find linear witnesses of network steerability corresponding to any negative partial transpose (NPT) bipartite state.
We construct linear inequalities to witness swap-steerability of every bipartite entangled state.
arXiv Detail & Related papers (2024-06-17T18:08:00Z) - Does the system entanglement care about the readout efficiency of
quantum measurement? [49.1574468325115]
We quantify the entanglement for a particle on a 1d quantum random walk under inefficient monitoring.
We find that the system's maximal mean entanglement at the measurement-induced quantum-to-classical crossover is in different ways by the measurement strength and inefficiency.
arXiv Detail & Related papers (2024-02-29T18:10:05Z) - Measurement-Device-Independent Detection of Beyond-Quantum State [53.64687146666141]
We propose a measurement-device-independent (MDI) test for beyond-quantum state detection.
We discuss the importance of tomographic completeness of the input sets to the detection.
arXiv Detail & Related papers (2023-12-11T06:40:13Z) - Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [46.99825956909532]
Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system.
This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
arXiv Detail & Related papers (2023-10-04T09:51:00Z) - Detection of Beyond-Quantum Non-locality based on Standard Local Quantum
Observables [46.03321798937856]
We show that device independent detection cannot distinguish beyond-quantum non-local states from standard quantum states.
This paper gives a device dependent detection based on local observables to distinguish any beyond-quantum non-local state from all standard quantum states.
arXiv Detail & Related papers (2023-01-10T20:19:34Z) - Efficient Bipartite Entanglement Detection Scheme with a Quantum
Adversarial Solver [89.80359585967642]
Proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits.
We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states.
arXiv Detail & Related papers (2022-03-15T09:46:45Z) - Efficient criteria of quantumness for a large system of qubits [58.720142291102135]
We discuss the dimensionless combinations of basic parameters of large, partially quantum coherent systems.
Based on analytical and numerical calculations, we suggest one such number for a system of qubits undergoing adiabatic evolution.
arXiv Detail & Related papers (2021-08-30T23:50:05Z) - Entanglement detection in quantum many-body systems using entropic
uncertainty relations [0.0]
We study experimentally accessible lower bounds on entanglement measures based on entropic uncertainty relations.
We derive an improved entanglement bound for bipartite systems, which requires measuring joint probability distributions in only two different measurement settings per subsystem.
arXiv Detail & Related papers (2021-01-21T20:50:11Z) - Nonlinear steering criteria for arbitrary two-qubit quantum systems [16.20946947543463]
We present some nonlinear steering criteria applicable for arbitrary two-qubit quantum systems and optimized ones for symmetric quantum states.
Compared with the existing linear steering criterion and entropic criterion, ours can certify more steerable states without selecting measurement settings or correlation weights.
arXiv Detail & Related papers (2020-09-30T19:57:37Z) - Number-phase entanglement and Einstein-Podolsky-Rosen steering [0.0]
entanglement and Einstein-Podolsky-Rosen steering criteria can be tested experimentally in a variety of systems.
They might find application in quantum information protocols, for example based on number-phase teleportation.
arXiv Detail & Related papers (2020-02-19T20:27:16Z)
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.