Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Chwedeńczuk, J."'
Publikováno v:
Phys. Rev. A 102, 033318 (2020)
We study the ultimate bounds on the sensitivity of a Bloch-oscillation atom interferometer where the external force is estimated from the measurement of the on-site atomic density. For external forces such that the energy difference between lattice s
Externí odkaz:
http://arxiv.org/abs/2009.06908
Publikováno v:
Phys. Rev. A 104, 023315 (2021)
We consider a hybrid system of matter and light as a sensing device and quantify the role of cooperative effects. The latter generically enhance the precision with which modifications of the effective light-matter coupling constant can be measured. I
Externí odkaz:
http://arxiv.org/abs/2007.13649
Publikováno v:
Phys. Rev. A 99, 062115 (2019)
We show that matter-wave interference fringes formed by two overlapping atomic clouds can yield information about the non-local Bell correlations. To this end, we consider a simple atomic interferometer, where the clouds are released from the double-
Externí odkaz:
http://arxiv.org/abs/1903.03367
Publikováno v:
Nature Communications, 10, 4447 (2019)
The violation of a Bell inequality is a striking demonstration of how quantum mechanics contradicts local realism. Although the original argument was presented with a pair of spin 1/2 particles, so far Bell inequalities have been shown to be violated
Externí odkaz:
http://arxiv.org/abs/1811.05681
Autor:
Wasak, T., Chwedenczuk, J.
Publikováno v:
Phys. Rev. Lett. 120, 140406 (2018)
We propose an experiment, where the Bell inequality is violated in a many-body system of massive particles. The source of correlated atoms is a spinor $F=1$ Bose-Einstein condensate residing in an optical lattice. We characterize the complete experim
Externí odkaz:
http://arxiv.org/abs/1710.10879
Autor:
Chwedenczuk, J.
Publikováno v:
Phys. Rev. A 96, 032320 (2017)
We consider the situation when the signal propagating through each arm of an interferometer has a complicated multi-mode structure. We find the relation between the particle-entanglement and the possibility to surpass the shot-noise limit of the phas
Externí odkaz:
http://arxiv.org/abs/1706.01700
We propose an enhanced optical interferometer based on tailored non-classical light generated by nonlinear dynamics and projective measurements in a three-level atom cavity QED system. A coherent state in the cavity becomes dynamically entangled with
Externí odkaz:
http://arxiv.org/abs/1703.03651
Entanglement between two separate systems is a necessary resource to violate a Bell inequality in a test of local realism. We demonstrate that to overcome the Bell bound, this correlation must be accompanied by the entanglement between the constituen
Externí odkaz:
http://arxiv.org/abs/1609.01576
Publikováno v:
Phys. Rev. A 92, 043622 (2015)
Preparation of a non-classically correlated state is the first step of any quantum-enhanced interferometric protocol. An efficient method is the one-axis twisting, which entangles a collection of initially uncorrelated particles by means of two-body
Externí odkaz:
http://arxiv.org/abs/1507.02182
Basing on the analogy between the coherent states of light and separable states of $N$ bosons, we demonstrate that the violation Cauchy-Schwarz inequality for any-order correlation function signals the entanglement among the constituent particles. Ra
Externí odkaz:
http://arxiv.org/abs/1504.06189