Signatures for generalized macroscopic superpositions

Abstract

We develop criteria sufficient to enable detection of macroscopic coherence where there are not just two macroscopically distinct outcomes for a pointer measurement, but rather a spread of outcomes over a macroscopic range. The criteria provide a means to distinguish a macroscopic quantum description from a microscopic one based on mixtures of microscopic superpositions of pointer-measurement eigenstates. The criteria are applied to Gaussian-squeezed and spin-entangled states.

4 pages, 2 figures, some changes made

References in corpus (1)

• Experimental demonstration of quantum memory for light

Cited by in corpus (4)

• Criteria for generalized macroscopic and mesoscopic quantum coherence
• Uncertainty relations for the realisation of macroscopic quantum superpositions and EPR paradoxes
• Characteristic Time and Maximum Mixedness: Single Mode Gaussian States in Dissipative Channels
• Experimental Demonstration of Macroscopic Quantum Coherence in Gaussian States