Generic eigenstate preparation via measurement-based purification
- URL: http://arxiv.org/abs/2307.16496v2
- Date: Fri, 27 Oct 2023 02:38:00 GMT
- Title: Generic eigenstate preparation via measurement-based purification
- Authors: Jia-shun Yan, Jun Jing
- Abstract summary: We discuss the measurement-based entanglement purification by which maximally entangled states can be distilled.
We demonstrate the significant acceleration of a stimulated Raman adiabatic passage assisted by similar measurements.
Our scheme allows arbitrary eigenstate preparation and reveals efficiency in multipartite systems for subspace purification.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: It is not a general opinion that that a quantum system could be purified into
a target eigenstate via repeated measurements on a coupled qubit rather than
direct transitions in the Hamiltonian. The projective measurement on the
ancillary qubit gives rise to the positive operator-valued measures on the
system that can filter out the unwanted states except the target one. In
application, we discuss the measurement-based entanglement purification by
which maximally entangled states (Bell states and Greenberger-Horne-Zeilinger
states) can be distilled from the maximally mixed states or separable states.
We also demonstrate the significant acceleration of a stimulated Raman
adiabatic passage assisted by similar measurements. Our scheme allows arbitrary
eigenstate preparation and reveals efficiency in multipartite systems for
subspace purification. It offers a promising and generic quantum-control
framework enriching the functionalities of quantum measurement.
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