Quantum discord as resource for remote state preparation

The existence of better-than-classical quantum information processing (QIP) models which consume very little or no entanglement suggests that separable or weakly entangled states could be extremely useful tools for information processing as they are much easier to prepare and control even in dissipa...

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Asıl Yazarlar: Dakić, B, Lipp, Y, Ma, X, Ringbauer, M, Kropatschek, S, Barz, S, Paterek, T, Vedral, V, Zeilinger, A, Brukner, C, Walther, P
Materyal Türü: Journal article
Baskı/Yayın Bilgisi: 2012
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author Dakić, B
Lipp, Y
Ma, X
Ma, X
Ringbauer, M
Kropatschek, S
Barz, S
Paterek, T
Vedral, V
Vedral, V
Zeilinger, A
Zeilinger, A
Brukner, C
Brukner, C
Walther, P
Walther, P
author_facet Dakić, B
Lipp, Y
Ma, X
Ma, X
Ringbauer, M
Kropatschek, S
Barz, S
Paterek, T
Vedral, V
Vedral, V
Zeilinger, A
Zeilinger, A
Brukner, C
Brukner, C
Walther, P
Walther, P
author_sort Dakić, B
collection OXFORD
description The existence of better-than-classical quantum information processing (QIP) models which consume very little or no entanglement suggests that separable or weakly entangled states could be extremely useful tools for information processing as they are much easier to prepare and control even in dissipative environments. It has been proposed that a resource of advantage is the generation of quantum discord, a measure of non-classical correlations that includes entanglement as a subset. Here we show that quantum discord is the necessary resource for quantum remote state preparation. We explicitly show that the geometric measure of quantum discord is related to the fidelity of this task, which provides its operational meaning. Our results are experimentally demonstrated using photonic quantum systems. Moreover, we demonstrate that separable states with non-zero quantum discord can outperform entangled states. Therefore, the role of quantum discord might provide fundamental insights for resource-efficient QIP. © 2012 Macmillan Publishers Limited. All rights reserved.
first_indexed 2024-03-07T06:31:12Z
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last_indexed 2024-03-07T06:31:12Z
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spelling oxford-uuid:f60a7f54-e621-43e6-a359-e96b4f5c46c62022-03-27T12:32:06ZQuantum discord as resource for remote state preparationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f60a7f54-e621-43e6-a359-e96b4f5c46c6Symplectic Elements at Oxford2012Dakić, BLipp, YMa, XMa, XRingbauer, MKropatschek, SBarz, SPaterek, TVedral, VVedral, VZeilinger, AZeilinger, ABrukner, CBrukner, CWalther, PWalther, PThe existence of better-than-classical quantum information processing (QIP) models which consume very little or no entanglement suggests that separable or weakly entangled states could be extremely useful tools for information processing as they are much easier to prepare and control even in dissipative environments. It has been proposed that a resource of advantage is the generation of quantum discord, a measure of non-classical correlations that includes entanglement as a subset. Here we show that quantum discord is the necessary resource for quantum remote state preparation. We explicitly show that the geometric measure of quantum discord is related to the fidelity of this task, which provides its operational meaning. Our results are experimentally demonstrated using photonic quantum systems. Moreover, we demonstrate that separable states with non-zero quantum discord can outperform entangled states. Therefore, the role of quantum discord might provide fundamental insights for resource-efficient QIP. © 2012 Macmillan Publishers Limited. All rights reserved.
spellingShingle Dakić, B
Lipp, Y
Ma, X
Ma, X
Ringbauer, M
Kropatschek, S
Barz, S
Paterek, T
Vedral, V
Vedral, V
Zeilinger, A
Zeilinger, A
Brukner, C
Brukner, C
Walther, P
Walther, P
Quantum discord as resource for remote state preparation
title Quantum discord as resource for remote state preparation
title_full Quantum discord as resource for remote state preparation
title_fullStr Quantum discord as resource for remote state preparation
title_full_unstemmed Quantum discord as resource for remote state preparation
title_short Quantum discord as resource for remote state preparation
title_sort quantum discord as resource for remote state preparation
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