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2015 ; 6
(ä): 7663
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Towards experimental quantum-field tomography with ultracold atoms
#MMPMID26138511
Steffens A
; Friesdorf M
; Langen T
; Rauer B
; Schweigler T
; Hübener R
; Schmiedmayer J
; Riofrío CA
; Eisert J
Nat Commun
2015[Jul]; 6
(ä): 7663
PMID26138511
show ga
The experimental realization of large-scale many-body systems in atomic-optical
architectures has seen immense progress in recent years, rendering full
tomography tools for state identification inefficient, especially for continuous
systems. To work with these emerging physical platforms, new technologies for
state identification are required. Here we present first steps towards efficient
experimental quantum-field tomography. Our procedure is based on the continuous
analogues of matrix-product states, ubiquitous in condensed-matter theory. These
states naturally incorporate the locality present in realistic physical settings
and are thus prime candidates for describing the physics of locally interacting
quantum fields. To experimentally demonstrate the power of our procedure, we
quench a one-dimensional Bose gas by a transversal split and use our method for a
partial quantum-field reconstruction of the far-from-equilibrium states of this
system. We expect our technique to play an important role in future studies of
continuous quantum many-body systems.