Localized quantum walks as secured quantum memory

Abstract

We show that a quantum walk process can be used to construct and secure quantum memory. More precisely, we show that a localized quantum walk with temporal disorder can be engineered to store the information of a single, unknown qubit on a compact position space and faithfully recover it on demand. Since the localization occurss with a finite spread in position space, the stored information of the qubit will be naturally secured from the simple eavesdropper. Our protocol can be adopted to any quantum system for which experimental control over quantum walk dynamics can be achieved.

7 pages, 4 figures

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Cited by in corpus (16)

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• Dirac Quantum Cellular Automaton from Split-step Quantum Walk
• Dynamics and energy spectra of aperiodic discrete-time quantum walks
• Enhanced non-Markovian behavior in quantum walks with Markovian disorder
• Bounds on the dynamics of periodic quantum walks and emergence of the gapless and gapped Dirac equation
• Quantum magnetometry using discrete-time quantum walk
• Quantum circuits for the realization of equivalent forms of one-dimensional discrete-time quantum walks on near-term quantum hardware
• Quantum walker as a probe for its coin parameter
• Estimation of one-dimensional discrete-time quantum walk parameters by using machine learning algorithms
• Scattering Expansion for Localization in One Dimension: from Disordered Wires to Quantum Walks
• Scattering Expansion for Localization in One Dimension
• Interference-induced localization in quantum random walk on clean cyclic graph
• Clustering-induced localization of quantum walks on networks
• Characterization of anomalous diffusion in one-dimensional quantum walks
• Noisy Cyclic Quantum Random Walk
• Response to glassy disorder in coin on spread of quantum walker