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<https://discovery.ucl.ac.uk/id/eprint/1410660> <http://purl.org/dc/terms/title> "Magnetically tunable singlet-triplet spin qubit in a four-electron InGaAs coupled quantum dot"^^<http://www.w3.org/2001/XMLSchema#string> .
<https://discovery.ucl.ac.uk/id/eprint/1410660> <http://purl.org/ontology/bibo/abstract> "A pair of self-assembled InGaAs quantum dots filled with two electrons can act as a singlet-triplet spin qubit\r\nthat is robust against nuclear spin fluctuations as well as charge noise. This results in a T2* coherence time\r\ntwo orders of magnitude longer than that of a single electron, provided the qubit is operated at a particular\r\n‘‘sweet spot’’ in gate voltage. However, at this fixed operating point the ground-state splitting can no longer\r\nbe tuned into resonance with e.g. another qubit, limiting the options for coupling multiple qubits. Here, we\r\npropose using a four-electron coupled quantum dot to implement a singlet-triplet qubit that features a\r\nmagnetically tunable level splitting. As a first step towards full experimental realization of this qubit design,\r\nwe use optical spectroscopy to demonstrate the tunability of the four-electron singlet-triplet splitting in a\r\nmoderate magnetic field."^^<http://www.w3.org/2001/XMLSchema#string> .
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