03.60.+i Entanglement of identical particles and statistics

Nonlocality in many-body quantum systems detected with two-body correlators

2015-06-22 - 2015-07-24

Jordi Tura, Remigiusz Augusiak, Ana Belén Sainz, Bernd Lücke, Carsten Klempt, Maciej Lewenstein, Antonio Acín


Annals of Physics, Volume 362, November 2015, Pages 370–423

Contemporary understanding of correlations in quantum many-body systems and in quantum phase transitions is based to a large extent on the recent intensive studies of entanglement in many-body systems.

Extracting entanglement from identical particles


N. Killoran, M. Cramer and M. B. Plenio


Physical Review Letters 112, 150501 (2014)

Identical particles and entanglement are both fundamental components of quantum mechanics. However, when identical particles are condensed in a single spatial mode, the standard notions of entanglement, based on clearly identifiable subsystems, break down. This has led many to conclude that such systems have limited value for quantum information tasks, compared to distinguishable particle systems.

How cold can you get in space? Quantum Physics at cryogenic temperatures in space


Gerald Hechenblaikner
Fabian Hufgard
Johannes Burkhardt
Nikolai Kiesel
Ulrich Johann
Markus Aspelmeyer
Rainer Kaltenbaek


arXiv:1309.3234v2 [quant-ph]

Two-point density correlations of quasicondensates in free expansion


S. Manz, R. Bücker, Th. Betz, C. Koller, S. Hofferberth, I. Mazets, A. Imambekov, E. Demler, A. Perrin,
J. Schmiedmayer, Thorsten Schumm
PRA, 81 (2010), S. 031610-1 - 031610-4

We measure the two-point density correlation function of freely expanding quasicondensates in the weakly interacting quasi-one-dimensional (1D) regime. While initially suppressed in the trap, density fluctuations emerge gradually during expansion as a result of initial phase fluctuations present in the trapped quasicondensate. Asymptotically, they are governed by the thermal coherence length of the system.

Aspects of Entanglement in Quantum Many-Body Systems

2009-03-24 - 2010-03-24

J. W. Clark, H. Habibian, A. D. Mandilara and M. L. Ristig
Foundation of Physics, DOI 10.1007/s10701-010-9467-6 (in press)

Knowledge of the entanglement properties of the wave functions commonly used to describe quantum many-particle systems can enhance our understanding of their correlation structure and provide new insights into quantum phase transitions that are observed experimentally or predicted theoretically.

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