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Joachim Fischbach

Publications and source records attributed to Joachim Fischbach.

2 recordsLinked to original sources
arXiv2015

Steady-state entanglement enhanced by a dissipative ancilla

We investigate how to enhance entanglement in the steady state of interacting two-level systems. The steady state is reached by spontaneous decay of the individual systems. When we additionally couple them to a dissipative two-level ancilla with variable eigenfrequency and coupling strength, we observe a considerable enhancement effect in the entanglement of this steady state. Moreover, we see that the increased entanglement is directly connected to the selection of certain excited states via the environment disturbing the ancilla. This effect could be used in dissipative state preparation schemes as well as a testbed for decoherence models.

quant-ph↗
arXiv2012

Quantum optical reconstruction scheme using weak values

A quantum state contains the maximal amount of information available for a given quantum system. In this paper we use weak-value expressions to reconstruct quantum states of continuous-variable systems in the quantum optical domain. The role played by postselecting measured data will be particularly emphasized in the proposed setup, which is based on an interferometer just using simple homodyne detection.

quant-ph↗