Related papers: Both qubits of the singlet state can be steered simultaneously by multiple independent observers via sequential measurement

Both qubits of the singlet state can be steered simultaneously by multiple independent observers via sequential measurement

URL: http://arxiv.org/abs/2102.12166v1
Date: Wed, 24 Feb 2021 09:37:55 GMT
Title: Both qubits of the singlet state can be steered simultaneously by multiple independent observers via sequential measurement
Authors: Kun Liu, Tongjun Liu, Wei Fang, Jian Li, Qin Wang
Abstract summary: A subsystem in entangled pairs can share nonlocality with multiple observers in sequence. It is found that the two qubits in singlet state can be simultaneously steered by two sequential observers.
Score: 10.918291217470799
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum correlation is a fundamental property which distinguishes quantum systems from classical ones, and it is also a fragile resource under projective measurement. Recently, it has been shown that a subsystem in entangled pairs can share nonlocality with multiple observers in sequence. Here we present a new steering scenario where both subsystems are accessible by multiple observers. And it is found that the two qubits in singlet state can be simultaneously steered by two sequential observers, respectively.

Related papers

Unbounded sequential multipartite nonlocality via violation of Mermin inequality [0.0]
Quantum nonlocality is a significant feature in quantum information theory. We study sequential nonlocality in systems comprising more parties and observer chains. Our results suggest that increasing the number of subsystems may enable more observer chains to detect nonlocality alongside single observers.
arXiv Detail & Related papers (2024-06-17T12:28:16Z)
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)
Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom. We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
arXiv Detail & Related papers (2023-03-13T13:06:40Z)
Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware [62.997667081978825]
We observe partial and infinite-temperature thermalization on a quantum superconducting processor. We show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis.
arXiv Detail & Related papers (2022-11-14T15:18:11Z)
Recycled entanglement detection by arbitrarily many sequential and independent pairs of observers [0.0]
We investigate the witnessing of two-qubit entangled states by sequential and independent pairs of observers. We find that a two-qubit entangled state can be used to witness entanglement arbitrarily many times.
arXiv Detail & Related papers (2022-01-07T18:37:49Z)
Beyond the entanglement of qubit pair in a mixed state [0.0]
Given a multipartite quantum system that consists of two-level particles (qubits), one may or may not have access to all the subsystems. Monogamy constraints, reported in this letter, are relations between well known entanglement measures such as one-tangle, two-tangles and three-tangles of an N-qubit pure state.
arXiv Detail & Related papers (2021-11-15T15:22:23Z)
Resource theoretic efficacy of the single copy of a two-qubit entangled state in a sequential network [0.0]
We demonstrate the resource theoretic advantage of reusing a single copy of a two-qubit entangled state towards information processing. We consider a scenario of sequential entanglement detection of a given two-qubit state by multiple independent observers on each of the two spatially separated wings.
arXiv Detail & Related papers (2021-09-23T15:18:08Z)
Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
arXiv Detail & Related papers (2021-02-01T18:09:01Z)
Ability of unbounded pairs of observers to achieve quantum advantage in random access codes with a single pair of qubits [0.0]
Complications in preparing and preserving quantum correlations stimulate recycling of a single quantum resource. We consider a scenario involving multiple independent pairs of observers acting with unbiased inputs on a single pair of spatially separated qubits sequentially.
arXiv Detail & Related papers (2021-01-04T20:33:04Z)
Equivalence of approaches to relational quantum dynamics in relativistic settings [68.8204255655161]
We show that the trinity' of relational quantum dynamics holds in relativistic settings per frequency superselection sector. We ascribe the time according to the clock subsystem to a POVM which is covariant with respect to its (quadratic) Hamiltonian.
arXiv Detail & Related papers (2020-07-01T16:12:24Z)
Quantum Zeno effect appears in stages [64.41511459132334]
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates. We show that the onset of the Zeno regime is marked by a $textitcascade of transitions$ in the system dynamics as the measurement strength is increased.
arXiv Detail & Related papers (2020-03-23T18:17:36Z)

This list is automatically generated from the titles and abstracts of the papers in this site.