Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy

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Standard

Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy. / Christandl, Matthias; Ferrara, Roberto.

In: Physical Review Letters, Vol. 119, No. 22, 220506, 30.11.2017.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Christandl, M & Ferrara, R 2017, 'Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy', Physical Review Letters, vol. 119, no. 22, 220506. https://doi.org/10.1103/PhysRevLett.119.220506

APA

Christandl, M., & Ferrara, R. (2017). Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy. Physical Review Letters, 119(22), [220506]. https://doi.org/10.1103/PhysRevLett.119.220506

Vancouver

Christandl M, Ferrara R. Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy. Physical Review Letters. 2017 Nov 30;119(22). 220506. https://doi.org/10.1103/PhysRevLett.119.220506

Author

Christandl, Matthias ; Ferrara, Roberto. / Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy. In: Physical Review Letters. 2017 ; Vol. 119, No. 22.

Bibtex

@article{c95c8a97011345508a47a8aa575d46b1,
title = "Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy",
abstract = "An important contribution to the understanding of quantum key distribution has been the discovery ofentangled states from which secret bits, but no maximally entangled states, can be extracted [Horodeckiet al., Phys. Rev. Lett. 94, 200501 (2005)]. The construction of those states was based on an intuition thatthe quantum mechanical phenomena of data hiding and privacy might be related. In this Letter we firmlyconnect these two phenomena and highlight three aspects of this result. First, we simplify the definition ofthe secret key rate. Second, we give a formula for the one-way distillable entanglement of certain privatestates. Third, we consider the problem of extending the distance of quantum key distribution with help ofintermediate stations, a setting called the quantum key repeater. We show that for protocols that first distillprivate states, it is essentially optimal to use the standard quantum repeater protocol based on entanglementdistillation and entanglement swapping.",
author = "Matthias Christandl and Roberto Ferrara",
year = "2017",
month = nov,
day = "30",
doi = "10.1103/PhysRevLett.119.220506",
language = "English",
volume = "119",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "22",

}

RIS

TY - JOUR

T1 - Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy

AU - Christandl, Matthias

AU - Ferrara, Roberto

PY - 2017/11/30

Y1 - 2017/11/30

N2 - An important contribution to the understanding of quantum key distribution has been the discovery ofentangled states from which secret bits, but no maximally entangled states, can be extracted [Horodeckiet al., Phys. Rev. Lett. 94, 200501 (2005)]. The construction of those states was based on an intuition thatthe quantum mechanical phenomena of data hiding and privacy might be related. In this Letter we firmlyconnect these two phenomena and highlight three aspects of this result. First, we simplify the definition ofthe secret key rate. Second, we give a formula for the one-way distillable entanglement of certain privatestates. Third, we consider the problem of extending the distance of quantum key distribution with help ofintermediate stations, a setting called the quantum key repeater. We show that for protocols that first distillprivate states, it is essentially optimal to use the standard quantum repeater protocol based on entanglementdistillation and entanglement swapping.

AB - An important contribution to the understanding of quantum key distribution has been the discovery ofentangled states from which secret bits, but no maximally entangled states, can be extracted [Horodeckiet al., Phys. Rev. Lett. 94, 200501 (2005)]. The construction of those states was based on an intuition thatthe quantum mechanical phenomena of data hiding and privacy might be related. In this Letter we firmlyconnect these two phenomena and highlight three aspects of this result. First, we simplify the definition ofthe secret key rate. Second, we give a formula for the one-way distillable entanglement of certain privatestates. Third, we consider the problem of extending the distance of quantum key distribution with help ofintermediate stations, a setting called the quantum key repeater. We show that for protocols that first distillprivate states, it is essentially optimal to use the standard quantum repeater protocol based on entanglementdistillation and entanglement swapping.

U2 - 10.1103/PhysRevLett.119.220506

DO - 10.1103/PhysRevLett.119.220506

M3 - Journal article

C2 - 29286800

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 22

M1 - 220506

ER -

ID: 186873019