scholarly journals Momentum-space entanglement after a quench in one-dimensional disordered fermionic systems

2019 ◽  
Vol 100 (24) ◽  
Author(s):  
Rex Lundgren ◽  
Fangli Liu ◽  
Pontus Laurell ◽  
Gregory A. Fiete
Keyword(s):  
Momentum Space ◽  
One Dimensional ◽  
Fermionic Systems

scholarly journals Momentum correlations as signature of sonic Hawking radiation in Bose-Einstein condensates

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Alessandro Fabbri ◽  
Nicolas Pavloff
Keyword(s):  
Hawking Radiation ◽  
Momentum Space ◽  
Einstein Condensate ◽  
Measuring Process ◽  
One Dimensional ◽  
Bose Einstein Condensate ◽  
Momentum Correlation ◽  
Quantum Quenches ◽  
Effects Of Temperature ◽  
Bose Einstein

We study the two-body momentum correlation signal in a quasi one dimensional Bose-Einstein condensate in the presence of a sonic horizon. We identify the relevant correlation lines in momentum space and compute the intensity of the corresponding signal. We consider a set of different experimental procedures and identify the specific issues of each measuring process. We show that some inter-channel correlations, in particular the Hawking quantum-partner one, are particularly well adapted for witnessing quantum non-separability, being resilient to the effects of temperature and/or quantum quenches.

scholarly journals TRIONIC AND QUARTETTING PHASES IN ONE-DIMENSIONAL MULTICOMPONENT ULTRACOLD FERMIONS

2008 ◽  
Vol 17 (10) ◽  
pp. 2110-2117 ◽  
Author(s):  
P. LECHEMINANT ◽  
P. AZARIA ◽  
E. BOULAT ◽  
S. CAPPONI ◽  
G. ROUX ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Nuclear Physics ◽  
Bound States ◽  
Cold Atoms ◽  
Low Energy ◽  
Low Density ◽  
Large Domain ◽  
One Dimensional ◽  
Fermionic Systems ◽  
Numerical Approaches

We investigate the possible formation of a molecular condensate, which might be, for instance, the analogue of the alpha condensate of nuclear physics, in the context of multicomponent cold atoms fermionic systems. A simple paradigmatic model of N-component fermions with contact interactions loaded into a one-dimensional optical lattice is studied by means of low-energy and numerical approaches. For attractive interaction, a quasi-long-range molecular superfluid phase, formed from bound-states made of N fermions, emerges at low density. We show that trionic and quartetting phases, respectively for N = 3,4, extend in a large domain of the phase diagram and are robust against small symmetry-breaking perturbations.

scholarly journals Implementation of one-dimensional quantum walks on spin-orbital angular momentum space of photons

2010 ◽  
Vol 81 (5) ◽  
Author(s):  
Pei Zhang ◽  
Bi-Heng Liu ◽  
Rui-Feng Liu ◽  
Hong-Rong Li ◽  
Fu-Li Li ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Momentum Space ◽  
Quantum Walks ◽  
Spin Orbital ◽  
One Dimensional

Fractional excitations in one-dimensional fermionic systems

2019 ◽  
Vol 94 (11) ◽  
pp. 115808
Author(s):  
Fei Ye ◽  
P A Marchetti
Keyword(s):  
One Dimensional ◽  
Fermionic Systems

scholarly journals Topological invariants and interacting one-dimensional fermionic systems

2012 ◽  
Vol 86 (20) ◽  
Author(s):  
Salvatore R. Manmana ◽  
Andrew M. Essin ◽  
Reinhard M. Noack ◽  
Victor Gurarie
Keyword(s):  
Topological Invariants ◽  
One Dimensional ◽  
Fermionic Systems

Special directions in momentum space. I. Cubic symmetries

2011 ◽  
Vol 44 (6) ◽  
pp. 1246-1254 ◽  
Author(s):  
G. Kontrym-Sznajd ◽  
M. Samsel-Czekała
Keyword(s):  
Compton Scattering ◽  
Brillouin Zone ◽  
Momentum Space ◽  
Three Dimensional ◽  
Reciprocal Space ◽  
One Dimensional

Some new sets of special directions (SDs) in the Brillouin zone for cubic structures are presented. They allow for construction in the reciprocal space of anisotropic quantities, having Γ1symmetry, from knowledge of such quantities along a limited number of SDs. These SDs also define which spectra, measured, for example, in Compton scattering experiments, are the most efficient for reconstructing three-dimensional densities from their one-dimensional projections. The new SDs are compared with results obtained by other authors.

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