# Indistinguishability of Elementary Systems as a Resource for Quantum Information Processing.

@article{LoFranco2018IndistinguishabilityOE, title={Indistinguishability of Elementary Systems as a Resource for Quantum Information Processing.}, author={Rosario Lo Franco and Giuseppe Compagno}, journal={Physical review letters}, year={2018}, volume={120 24}, pages={ 240403 } }

Typical elements of quantum networks are made by identical systems, which are the basic particles constituting a resource for quantum information processing. Whether the indistinguishability due to particle identity is an exploitable quantum resource remains an open issue. Here we study independently prepared identical particles showing that, when they spatially overlap, an operational entanglement exists that can be made manifest by means of separated localized measurements. We prove this…

## 77 Citations

Activating remote entanglement in a quantum network by local counting of identical particles

- PhysicsPhysical Review A
- 2019

Quantum information and communication processing within quantum networks usually employs identical particles. Despite this, the physical role of quantum statistical nature of particles in large-scale…

Indistinguishability-enabled coherence for quantum metrology

- PhysicsPhysical Review A
- 2019

Quantum coherence plays a fundamental and operational role in different areas of physics. A resource theory has been developed to characterize the coherence of distinguishable particles systems. Here…

Effects of Indistinguishability in a System of Three Identical Qubits

- PhysicsProceedings
- 2019

Quantum correlations of identical particles are important for quantum-enhanced technologies. The recently introduced non-standard approach to treat identical particles is here exploited to show the…

Robust entanglement preparation against noise by controlling spatial indistinguishability

- Physicsnpj Quantum Information
- 2020

It is found that spatial indistinguishability, even partial, can be a property shielding nonlocal entanglement from preparation noise, independently of the exact shape of spatial wave functions.

Experimental quantum entanglement and teleportation by tuning remote spatial indistinguishability of independent photons.

- PhysicsOptics letters
- 2020

A setup capable of tuning remote spatial indistinguishability of two independent photons by individually adjusting their spatial distribution in two distant regions, leading to polarization entanglement from uncorrelated photons is designed.

Endurance of quantum coherence due to particle indistinguishability in noisy quantum networks

- Physicsnpj Quantum Information
- 2018

Quantum coherence, the physical property underlying fundamental phenomena such as multi-particle interference and entanglement, has emerged as a valuable resource upon which modern technologies are…

Experimental control of remote spatial indistinguishability of photons to realize entanglement and teleportation

- Physics
- 2020

Remote spatial indistinguishability of identical subsystems as a direct controllable quantum resource at distant sites has not been yet experimentally proven. We design a setup capable to tune the…

Generating indistinguishability within identical particle systems: spatial deformations as quantum resource activators

- Physics
- 2022

Identical quantum subsystems can possess a property which does not have any classical counter-part: indistinguishability. As a long-debated phenomenon, identical particles’ indistinguishability has…

Entangling bosons through particle indistinguishability and spatial overlap.

- PhysicsOptics express
- 2020

Theoretical and experimentally investigate the behavior of entanglement between two bosons as spatial overlap and indistinguishability simultaneously vary and show that the amount ofEntanglement is a monotonically increasing function of both quantities.

Indistinguishability as a quantum information resource by localized measurements

- Computer Science, PhysicsQuantum Information and Measurement (QIM) V: Quantum Technologies
- 2019

This work shows indistinguishability as a direct quantum resource is achievable by spatially localized measurements, enabling teleportation and entanglement swapping protocols.

## References

SHOWING 1-10 OF 83 REFERENCES

N identical particles and one particle to entangle them all

- Physics
- 2017

In quantum information W states are a central class of multipartite entangled states because of their robustness against noise and use in many quantum processes. Their generation however remains a…

Novel schemes for measurement-based quantum computation.

- Physics, Computer SciencePhysical review letters
- 2007

It is shown that there exist resource states which are locally arbitrarily close to a pure state, and comment on the possibility of tailoring computational models to specific physical systems.

Duality in entanglement enabling a test of quantum indistinguishability unaffected by interactions.

- PhysicsPhysical review letters
- 2013

A property which is called "dualism" that characterizes the entanglement of two identical particles is pointed out, which can be used to test quantum indistinguishability without bringing the relevant particles together, thereby avoiding the effects of mutual interaction.

Performances and robustness of quantum teleportation with identical particles

- PhysicsProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
- 2016

Here, this work studies the convergence of teleportation performances in the above limit and provides sufficient conditions for asymptotic perfect teleportation and applies these conditions to the case of resource states affected by noise.

Quantum entanglement of identical particles by standard information-theoretic notions

- PhysicsScientific reports
- 2016

This work introduces a state-based method which, as second quantization, does not label identical particles and establishes the quantitative role played by arbitrary wave function overlaps, local measurements and particle nature in assessing entanglement by notions commonly used in quantum information theory for distinguishable particles, like partial trace.

Measuring entanglement entropy in a quantum many-body system

- PhysicsNature
- 2015

Making use of the single-site-resolved control of ultracold bosonic atoms in optical lattices, two identical copies of a many-body state are prepared and interfered to directly measure quantum purity, Rényi entanglement entropy, and mutual information.

Extracting entanglement from identical particles.

- PhysicsPhysical review letters
- 2014

It is shown that any entanglement formally appearing amongst the identical particles can be extracted into an entangled state of independent modes, which can then be applied to any task.

Entanglement of indistinguishable particles

- Physics
- 2011

We present a general criterion for entanglement of N indistinguishable particles decomposed into arbitrary s subsystems based on the unambiguous measurability of correlation. Our argument provides a…

Universality of Schmidt decomposition and particle identity

- PhysicsScientific reports
- 2017

This work proves a universal Schmidt decomposition which allows faithful quantification of the physical entanglement due to the identity of particles, and finds that it is affected by single-particle measurement localization and state overlap.

Quantum computers

- PhysicsNature
- 2010

The latest developments for each of the leading approaches to quantum computation are described and the major challenges for the future are explained.