ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

ápr  28. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Hetényi Bence (IBM Research - Zurich):
Tailored error correction codes for spin qubits

Spin qubits in semiconductor structures bring the promise of large-scale 2D
integration, with the possibility to incorporate the control electronics on
the same chip. Recent spin-qubit experiments demonstrate gate operations
and readout well within 1% error rate. This error rate, based on the error
threshold of the surface code under circuit-level noise, has become a
standard figure of merit for gate errors in the spin-qubit community. The
isotropic circuit-level noise model, however, assumes that gate errors,
measurement errors, and data qubit errors during ancilla measurements occur
with the same probability suggesting that the requirements might be less
stringent for some of these ingredients. Furthermore, recent developments
in quantum error correction codes present opportunities to improve the
error threshold and reduce connectivity requirements compared to Kitaev’s
surface code. In this work we consider state-of-the-art error-correction
codes that require only nearest-neighbour two-qubit gates, and study their
performance under anisotropic circuit-level noise that accounts for
distinct error rates for gates, measurement and qubit decoherence during
idling. We present the spin-qubit layout required for each of the error
correction codes, accounting for additional elements required by spin-qubit
architectures such as auxiliary quantum dots for spin-blockade-assisted
readout.


Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor