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Probing the quantum states of a single atom transistor at microwave frequencies

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posted on 2023-06-09, 08:58 authored by Giuseppe Carlo Tettamanzi, Samuel HileSamuel Hile, Matthew Gregory House, Martin Fuechsle, Sven Rogge, Michelle Y Simmons
The ability to apply gigahertz frequencies to control the quantum state of a single P atom is an essential requirement for the fast gate pulsing needed for qubit control in donor-based silicon quantum computation. Here, we demonstrate this with nanosecond accuracy in an all epitaxial single atom transistor by applying excitation signals at frequencies up to ˜13 GHz to heavily phosphorus-doped silicon leads. These measurements allow the differentiation between the excited states of the single atom and the density of states in the one-dimensional leads. Our pulse spectroscopy experiments confirm the presence of an excited state at an energy ˜9 meV, consistent with the first excited state of a single P donor in silicon. The relaxation rate of this first excited state to the ground state is estimated to be larger than 2.5 GHz, consistent with theoretical predictions. These results represent a systematic investigation of how an atomically precise single atom transistor device behaves under radio frequency excitations.

History

Publication status

  • Published

File Version

  • Published version

Journal

ACS Nano

ISSN

1936-0851

Issue

3

Volume

11

Page range

2444-2451

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-01-12

First Open Access (FOA) Date

2018-01-12

First Compliant Deposit (FCD) Date

2018-01-12

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