Houhou, Oussama;
Moore, Darren W;
Bose, Sougato;
Ferraro, Alessandro;
(2022)
Unconditional measurement-based quantum computation with optomechanical continuous variables.
Physical Review A
, 105
(1)
, Article 012610. 10.1103/PhysRevA.105.012610.
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Abstract
Universal quantum computation encoded over continuous variables can be achieved via Gaussian measurements acting on entangled non-Gaussian states. However, due to the weakness of available nonlinearities, generally these states can only be prepared conditionally, potentially with low probability. Here we show how universal quantum computation could be implemented unconditionally using an integrated platform able to sustain both linear and quadratic optomechanical-like interactions. Specifically, considering cavity opto- and electromechanical systems, we propose a realization of a driven-dissipative dynamics that deterministically prepares the required non-Gaussian cluster states—entangled squeezed states of multiple mechanical oscillators suitably interspersed with cubic-phase states. We next demonstrate how arbitrary Gaussian measurements on the cluster nodes can be performed by continuously monitoring the output cavity field. Finally, the feasibility requirements of this approach are analyzed in detail, suggesting that its building blocks are within reach of current technology.
Type: | Article |
---|---|
Title: | Unconditional measurement-based quantum computation with optomechanical continuous variables |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevA.105.012610 |
Publisher version: | https://doi.org/10.1103/PhysRevA.105.012610 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Optomechanics, Quantum computation, Quantum information processing with continuous variables, Quantum optics |
UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10143490 |
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