Cut-and-paste restoration of entanglement transmission

Abstract

The distribution of entangled quantum systems among two or more nodes of a network is a key task at the basis of quantum communication, quantum computation and quantum cryptography. Unfortunately the transmission lines used in this procedure can introduce so much perturbations and noise in the transmitted signal that prevent the possibility of restoring quantum correlations in the received messages either by means of encoding optimization or by exploiting local operations and classical communication. In this work we present a procedure which allows one to improve the performance of some of these channels. The mechanism underpinning this result is a protocol which we dub cut-and-paste, as it consists in extracting and reshuffling the sub-components of these communication lines, which finally succeed in "correcting each other". The proof of this counterin- tuitive phenomenon, while improving our theoretical understanding of quantum entanglement, has also a direct application in the realization of quantum information networks based on imperfect and highly noisy communication lines. A quantum optics experiment, based on the transmission of single-photon polarization states, is also presented which provides a proof-of-principle test of the proposed protocol.

References in corpus (23)

• Quantum entanglement
• Quantum Cryptography
• Entanglement of Formation of an Arbitrary State of Two Qubits
• The Quantum Internet
• Long-distance quantum communication with atomic ensembles and linear optics
• Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels
• Decoherence Free Subspaces for Quantum Computation
• Dynamical suppression of decoherence in two-state quantum systems
• Quantum Error Correction for Quantum Memories
• Noiseless Quantum Codes
• Multiple Particle Interference and Quantum Error Correction
• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Optimized Dynamical Decoupling in a Model Quantum Memory
• General Entanglement Breaking Channels
• A wavelength-tunable fiber-coupled source of narrowband entangled photons
• Distributed quantum computation via optical fibres
• Coding Theorems for Quantum Channels
• Random decoupling schemes for quantum dynamical control and error suppression
• Experimental on-demand recovery of entanglement by local operations within non-Markovian dynamics
• Experimental inhibition of decoherence on flying qubits via bang-bang control
• Quantifying the noise of a quantum channel by noise addition
• Entanglement-Breaking Indices
• Amendable Gaussian channels:restoring entanglement via a unitary filter

Cited by in corpus (11)

• Geometrical bounds on irreversibility in open quantum systems
• Experimental detection of quantum channel capacities
• Dynamics of spatially indistinguishable particles and entanglement protection
• Entanglement robustness via spatial deformation of identical particle wave functions
• Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication
• Amending entanglement-breaking channels via intermediate unitary operations
• Robust engineering of maximally entangled states by identical particle interferometry
• Quantumness and speedup limit of a qubit under transition frequency modulation
• Entanglement Protection via Periodic Environment Resetting in Continuous Time Quantum Dynamical Processes
• Asymptotic Dynamics of Open Quantum Systems and Modular Theory
• Indistinguishability-assisted two-qubit entanglement distillation