Gray, J;
Bayat, A;
Puddy, RK;
Smith, CG;
Bose, S;
(2016)
Unravelling quantum dot array simulators via singlet-triplet measurements.
PHYSICAL REVIEW B
, 94
(19)
, Article 195136. 10.1103/PhysRevB.94.195136.
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Abstract
Recently, singlet-triplet measurements in double dots have emerged as a powerful tool in quantum information processing. In parallel, quantum dot arrays are being envisaged as analog quantum simulators of many-body models. Thus motivated, we explore the potential of the above singlet-triplet measurements for probing and exploiting the ground state of a Heisenberg spin chain in such a quantum simulator. We formulate an efficient protocol to discriminate the achieved many-body ground state with other likely states. Moreover, the transition between quantum phases, arising from the addition of frustrations in a J 1 − J 2 model, can be systematically explored using the same set of measurements. We show that the proposed measurements have an application in producing long distance heralded entanglement between well separated quantum dots. Relevant noise sources, such as nonzero temperatures and nuclear spin interactions, are considered.
Type: | Article |
---|---|
Title: | Unravelling quantum dot array simulators via singlet-triplet measurements |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevB.94.195136 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevB.94.195136 |
Additional information: | © 2016 American Physical Society |
Keywords: | Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, DOPANT ATOMS, ENTANGLEMENT, SILICON, STATES, QUBIT, SPINS |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1540937 |
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