Super-Additivity and Entanglement Assistance in Quantum Reading

Cosmo Lupo; Stefano Pirandola

Super-Additivity and Entanglement Assistance in Quantum Reading

Computer Science

Research output: Working paper › Preprint

Abstract

Quantum information theory determines the maximum rates at which information can be transmitted through physical systems described by quantum mechanics. Here we consider the communication protocol known as quantum reading. Quantum reading is a protocol for retrieving the information stored in a digital memory by using a quantum probe, e.g., shining quantum states of light to read an optical memory. In a variety of situations using a quantum probe enhances the performances of the reading protocol in terms of fidelity, data density and energy dissipation. Here we review and characterize the quantum reading capacity of a memory model, defined as the maximum rate of reliable reading. We show that, like other quantities in quantum information theory, the quantum reading capacity is super-additive. Moreover, we determine conditions under which the use of an entangled ancilla improves the performance of quantum reading.

Original language	English
Publication status	Published - 4 Mar 2016

Bibliographical note

9 pages, 5 figures, comments welcome

Keywords

quant-ph

Access to Document

http://arxiv.org/abs/1603.01433

Cite this

@techreport{bcc573f60da94fbbbe32e44eb79e26b4,

title = "Super-Additivity and Entanglement Assistance in Quantum Reading",

abstract = "Quantum information theory determines the maximum rates at which information can be transmitted through physical systems described by quantum mechanics. Here we consider the communication protocol known as quantum reading. Quantum reading is a protocol for retrieving the information stored in a digital memory by using a quantum probe, e.g., shining quantum states of light to read an optical memory. In a variety of situations using a quantum probe enhances the performances of the reading protocol in terms of fidelity, data density and energy dissipation. Here we review and characterize the quantum reading capacity of a memory model, defined as the maximum rate of reliable reading. We show that, like other quantities in quantum information theory, the quantum reading capacity is super-additive. Moreover, we determine conditions under which the use of an entangled ancilla improves the performance of quantum reading.",

keywords = "quant-ph",

author = "Cosmo Lupo and Stefano Pirandola",

note = "9 pages, 5 figures, comments welcome",

year = "2016",

month = mar,

day = "4",

language = "English",

type = "WorkingPaper",

}

TY - UNPB

T1 - Super-Additivity and Entanglement Assistance in Quantum Reading

AU - Lupo, Cosmo

AU - Pirandola, Stefano

N1 - 9 pages, 5 figures, comments welcome

PY - 2016/3/4

Y1 - 2016/3/4

N2 - Quantum information theory determines the maximum rates at which information can be transmitted through physical systems described by quantum mechanics. Here we consider the communication protocol known as quantum reading. Quantum reading is a protocol for retrieving the information stored in a digital memory by using a quantum probe, e.g., shining quantum states of light to read an optical memory. In a variety of situations using a quantum probe enhances the performances of the reading protocol in terms of fidelity, data density and energy dissipation. Here we review and characterize the quantum reading capacity of a memory model, defined as the maximum rate of reliable reading. We show that, like other quantities in quantum information theory, the quantum reading capacity is super-additive. Moreover, we determine conditions under which the use of an entangled ancilla improves the performance of quantum reading.

AB - Quantum information theory determines the maximum rates at which information can be transmitted through physical systems described by quantum mechanics. Here we consider the communication protocol known as quantum reading. Quantum reading is a protocol for retrieving the information stored in a digital memory by using a quantum probe, e.g., shining quantum states of light to read an optical memory. In a variety of situations using a quantum probe enhances the performances of the reading protocol in terms of fidelity, data density and energy dissipation. Here we review and characterize the quantum reading capacity of a memory model, defined as the maximum rate of reliable reading. We show that, like other quantities in quantum information theory, the quantum reading capacity is super-additive. Moreover, we determine conditions under which the use of an entangled ancilla improves the performance of quantum reading.

KW - quant-ph

M3 - Preprint

BT - Super-Additivity and Entanglement Assistance in Quantum Reading

ER -