Nuclear spin readout in a cavity-coupled silicon double quantum dot
ORAL
Abstract
Nuclear spins show long coherence times and are well isolated from the environment, which are properties making them promising for quantum information applications. However, these same qualities make the readout of nuclear spin qubits challenging. Here, we present a method for nuclear spin readout by probing the transmission of a microwave resonator. We consider the flopping mode spin qubit [1,2] formed by a single electron in a silicon double quantum dot subjected to a homogeneous magnetic field and a transverse magnetic field gradient. This qubit interacts with a microwave resonator via the electric dipole coupling allowing for strong spin photon coupling [3,4]. In our scenario, the electron spin interacts with a 31P defect nuclear spin via the hyperfine interaction. Our theoretical investigation demonstrates a 31P nuclear spin state dependent change of the cavity transmission that could be resolved in experiments and used to readout the state of the nuclear spin.
[1] Benito et al., Phys. Rev. B 100, 125430 (2019)
[2] Croot et al., Phys. Rev. Research 2, 012006 (2020)
[3] Mi et al., Nature 555, 599 (2018)
[4] Benito et al., Phys. Rev. B 96, 235434 (2017)
[1] Benito et al., Phys. Rev. B 100, 125430 (2019)
[2] Croot et al., Phys. Rev. Research 2, 012006 (2020)
[3] Mi et al., Nature 555, 599 (2018)
[4] Benito et al., Phys. Rev. B 96, 235434 (2017)
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Presenters
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Jonas Mielke
Department of Physics, University of Konstanz, D-78457 Konstanz, Germany
Authors
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Jonas Mielke
Department of Physics, University of Konstanz, D-78457 Konstanz, Germany
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Jason Petta
Princeton University, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
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Guido Burkard
Physics, University of Konstanz, Department of Physics, University of Konstanz, D-78457 Konstanz, Germany, Univ Konstanz