Geometric reduction of dynamical nonlocality in nanoscale quantum circuits

Elia Strambini, K.S. Makarenko, K.S. Makarenko, G. Abulizi, Machiel Pieter de Jong, Wilfred Gerard van der Wiel

Research output: Contribution to journalArticleAcademicpeer-review

41 Downloads (Pure)

Abstract

Nonlocality is a key feature discriminating quantum and classical physics. Quantum-interference phenomena, such as Young’s double slit experiment, are one of the clearest manifestations of nonlocality, recently addressed as dynamical to specify its origin in the quantum equations of motion. It is well known that loss of dynamical nonlocality can occur due to (partial) collapse of the wavefunction due to a measurement, such as which-path detection. However, alternative mechanisms affecting dynamical nonlocality have hardly been considered, although of crucial importance in many schemes for quantum information processing. Here, we present a fundamentally different pathway of losing dynamical nonlocality, demonstrating that the detailed geometry of the detection scheme is crucial to preserve nonlocality. By means of a solid-state quantum-interference experiment we quantify this effect in a diffusive system. We show that interference is not only affected by decoherence, but also by a loss of dynamical nonlocality based on a local reduction of the number of quantum conduction channels of the interferometer. With our measurements and theoretical model we demonstrate that this mechanism is an intrinsic property of quantum dynamics. Understanding the geometrical constraints protecting nonlocality is crucial when designing quantum networks for quantum information processing.
Original languageEnglish
Article number18827
Number of pages6
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 6 Jan 2016

Fingerprint

interference
slits
equations of motion
interferometers
solid state
conduction
physics
geometry

Keywords

  • EWI-26779
  • IR-99345
  • METIS-315583

Cite this

@article{d8c0ec69fc6b40408161153e262d38bd,
title = "Geometric reduction of dynamical nonlocality in nanoscale quantum circuits",
abstract = "Nonlocality is a key feature discriminating quantum and classical physics. Quantum-interference phenomena, such as Young’s double slit experiment, are one of the clearest manifestations of nonlocality, recently addressed as dynamical to specify its origin in the quantum equations of motion. It is well known that loss of dynamical nonlocality can occur due to (partial) collapse of the wavefunction due to a measurement, such as which-path detection. However, alternative mechanisms affecting dynamical nonlocality have hardly been considered, although of crucial importance in many schemes for quantum information processing. Here, we present a fundamentally different pathway of losing dynamical nonlocality, demonstrating that the detailed geometry of the detection scheme is crucial to preserve nonlocality. By means of a solid-state quantum-interference experiment we quantify this effect in a diffusive system. We show that interference is not only affected by decoherence, but also by a loss of dynamical nonlocality based on a local reduction of the number of quantum conduction channels of the interferometer. With our measurements and theoretical model we demonstrate that this mechanism is an intrinsic property of quantum dynamics. Understanding the geometrical constraints protecting nonlocality is crucial when designing quantum networks for quantum information processing.",
keywords = "EWI-26779, IR-99345, METIS-315583",
author = "Elia Strambini and K.S. Makarenko and K.S. Makarenko and G. Abulizi and {de Jong}, {Machiel Pieter} and {van der Wiel}, {Wilfred Gerard}",
note = "Open access",
year = "2016",
month = "1",
day = "6",
doi = "10.1038/srep18827",
language = "English",
volume = "6",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

Geometric reduction of dynamical nonlocality in nanoscale quantum circuits. / Strambini, Elia; Makarenko, K.S.; Makarenko, K.S.; Abulizi, G.; de Jong, Machiel Pieter; van der Wiel, Wilfred Gerard.

In: Scientific reports, Vol. 6, 18827, 06.01.2016.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Geometric reduction of dynamical nonlocality in nanoscale quantum circuits

AU - Strambini, Elia

AU - Makarenko, K.S.

AU - Makarenko, K.S.

AU - Abulizi, G.

AU - de Jong, Machiel Pieter

AU - van der Wiel, Wilfred Gerard

N1 - Open access

PY - 2016/1/6

Y1 - 2016/1/6

N2 - Nonlocality is a key feature discriminating quantum and classical physics. Quantum-interference phenomena, such as Young’s double slit experiment, are one of the clearest manifestations of nonlocality, recently addressed as dynamical to specify its origin in the quantum equations of motion. It is well known that loss of dynamical nonlocality can occur due to (partial) collapse of the wavefunction due to a measurement, such as which-path detection. However, alternative mechanisms affecting dynamical nonlocality have hardly been considered, although of crucial importance in many schemes for quantum information processing. Here, we present a fundamentally different pathway of losing dynamical nonlocality, demonstrating that the detailed geometry of the detection scheme is crucial to preserve nonlocality. By means of a solid-state quantum-interference experiment we quantify this effect in a diffusive system. We show that interference is not only affected by decoherence, but also by a loss of dynamical nonlocality based on a local reduction of the number of quantum conduction channels of the interferometer. With our measurements and theoretical model we demonstrate that this mechanism is an intrinsic property of quantum dynamics. Understanding the geometrical constraints protecting nonlocality is crucial when designing quantum networks for quantum information processing.

AB - Nonlocality is a key feature discriminating quantum and classical physics. Quantum-interference phenomena, such as Young’s double slit experiment, are one of the clearest manifestations of nonlocality, recently addressed as dynamical to specify its origin in the quantum equations of motion. It is well known that loss of dynamical nonlocality can occur due to (partial) collapse of the wavefunction due to a measurement, such as which-path detection. However, alternative mechanisms affecting dynamical nonlocality have hardly been considered, although of crucial importance in many schemes for quantum information processing. Here, we present a fundamentally different pathway of losing dynamical nonlocality, demonstrating that the detailed geometry of the detection scheme is crucial to preserve nonlocality. By means of a solid-state quantum-interference experiment we quantify this effect in a diffusive system. We show that interference is not only affected by decoherence, but also by a loss of dynamical nonlocality based on a local reduction of the number of quantum conduction channels of the interferometer. With our measurements and theoretical model we demonstrate that this mechanism is an intrinsic property of quantum dynamics. Understanding the geometrical constraints protecting nonlocality is crucial when designing quantum networks for quantum information processing.

KW - EWI-26779

KW - IR-99345

KW - METIS-315583

U2 - 10.1038/srep18827

DO - 10.1038/srep18827

M3 - Article

VL - 6

JO - Scientific reports

JF - Scientific reports

SN - 2045-2322

M1 - 18827

ER -