Maximal-steered-coherence protection by quantum reservoir engineering

Maleki, Yusef; Ahansaz, Bahram

doi:10.1103/physreva.102.020402

Cited by 17 publications

(20 citation statements)

References 36 publications

(37 reference statements)

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“…As a result, quantum entanglement is the key to unify these two settings and lay out a general formalism for quantum complementarity. Our study, illuminating the deep connection between quantum eraser protocols and wave-particleentanglement triality, may shed new light on fundamental aspects of quantum interferometry [22], quantum coherence, and quantum steering [33].…”

Section: Duality−entanglement Relationmentioning

confidence: 97%

Quantum eraser from duality--entanglement perspective

Maleki,

Liu,

Zubairy

2021

Preprint

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Wave-particle duality is a bizarre feature at the heart of quantum mechanics which refers to the mutually exclusive dual attributes of quantum objects as the wave and the particle. Quantum eraser presents a counterintuitive aspect of the wave-particle duality. In this work, we show that quantum eraser can be quantitatively understood in terms of the recently developed duality-entanglement relation. In other words, we show that wave-particle-entanglement triality captures all the physics of the quantum erasure. We find that a controllable partial erasure of the which-path information is attainable, enabling the partial recovery of the quantum interference and extending the scope of the conventional quantum eraser protocols.

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Section: Duality−entanglement Relationmentioning

confidence: 97%

Quantum eraser from duality--entanglement perspective

Maleki,

Liu,

Zubairy

2021

Preprint

Self Cite

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“…Recently, a quantum-reservoir-engineering approach [21] i.e. by adding some auxiliary qubits to the reservoir has been suggested to protect entanglement [21][22][23][24][25], coherence [26][27][28][29] and the entropic-uncertainty lower bound [30]. Up until now, we have not seen any reports for the quantum reservoir engineering approach on the protection of quantum discord against decoherence.…”

Section: Introductionmentioning

confidence: 99%

A quantum beat of quantum discord induced by the number of qubits in non-Markovian environments

He¹,

He²,

Chen³

2020

Laser Phys.

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We investigate the protection of the quantum discord of two qubits, individually originated by two generalized amplitude-damping models. Here, each generalized amplitude-damping model consists of N non-interacting qubits interacting with a common zero-temperature reservoir. First, for initial states with extended Werner-like states, we find that the robust quantum discord of two qubits against decoherence can be obtained by controlling the number of qubits in the reservoir. More interestingly, we find that a quantum beat for quantum discord can occur when both the number of qubits in each reservoir is large and when the number of qubits have a tiny difference, even in the resonant case. Our results shed new light on the protection of quantum discord by means of a quantum-reservoir engineering approach in quantum-information processing.

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“…The QSE provides a novel avenue to visually investigate and capture various quantum nonlocalities [30]. Due to these interesting properties, a variety of promising works has been achieved [28][29][30][31][32][33][34][35][36][37][38]. By using the QSE, Jevtic et al [28] proposed the condition of nested tetrahedron to prove whether a quantum state is separable.…”

Section: Introductionmentioning

confidence: 99%

“…The generalized QSE for a qubit-field system was characterized by Athulya et al [36]. Maleki et al [37] investigated the protection of maximal steered coherence through the QSE. Recently, considering the XXZ model, Du et al [38] revealed the quantum phase transitions via the QSE, and found the relation between the QSE and quantum phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Visually capture quantum nonlocalities through quantum steering ellipsoid

Xing¹,

Yang²,

Li³

et al. 2023

Laser Phys. Lett.

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Quantum steering ellipsoid (QSE) can faithfully characterize arbitrary bipartite state, and provide a new method to visually investigate and capture various quantum nonlocalities. Note that the dissipation of quantum nonlocalities can be accelerated by the coupling between the system and the decoherence channel, which induces great challenges in detecting quantum nonlocalities. Herein, considering the scenario in which the subsystem of a two-qubit system is coupled with a decoherence channel, the quantum discord (QD) and concurrence are visually characterized and detected by employing the QSE. The results reveal that the QSE y and z semiaxes are responsible for the traits of the QD and concurrence under the bit flip channel. The x and y semiaxes dominate and visualize the QD and concurrence under the phase damping channel. Of particular note is that one can realize the detections of the QD and concurrence via the shape of the QSE. To be clearer, the disappearance of the QD can be ascertained according to a needle-shaped QSE or a vanishing QSE in the Bloch sphere. In contrast, one can witness the concurrence if the total semiaxis length is greater than one. Beyond this, our results visually reveal that quantum entanglement is a stronger quantum nonlocality than the QD from the perspective of geometry, and thus deepens the understanding of the quantum nonlocality.

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Maximal-steered-coherence protection by quantum reservoir engineering

Cited by 17 publications

References 36 publications

Quantum eraser from duality--entanglement perspective

Quantum eraser from duality--entanglement perspective

A quantum beat of quantum discord induced by the number of qubits in non-Markovian environments

Visually capture quantum nonlocalities through quantum steering ellipsoid

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