Probing Macroscopic Quantum States

  • Haixing Miao
Part of the Springer Theses book series (Springer Theses)


In this chapter, we consider a subsequent verification stage which probes the prepared macroscopic quantum state, and verifies the quantum dynamics. By adopting an optimal time-dependent homodyne detection method, in which the phase of the local oscillator varies in time, the conditional quantum state can be characterized below the Heisenberg limit, thereby achieving a quantum tomography. In the limiting case of no readout loss, such a scheme evades measurement-induced back-action, which is identical to the variational-type measurement scheme invented by Vyatchanin et al., but in the context for detecting gravitational waves (GWs).


Wigner Function Test Mass Classical Noise Verification Accuracy Standard Quantum Limit 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Caltech M350-17Theoretical AstrophysicsPasadenaUSA

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