Fast high-fidelity single-qubit gates for flip-flop qubits in silicon
- URL: http://arxiv.org/abs/2101.11592v2
- Date: Mon, 10 Oct 2022 21:36:45 GMT
- Title: Fast high-fidelity single-qubit gates for flip-flop qubits in silicon
- Authors: Fernando A. Calderon-Vargas, Edwin Barnes, Sophia E. Economou
- Abstract summary: flip-flop qubit is encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon.
We study the multilevel system that is formed by the interacting electron and nuclear spins.
We propose an optimal control scheme that produces fast and robust single-qubit gates in the presence of low-frequency noise.
- Score: 68.8204255655161
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The flip-flop qubit, encoded in the states with antiparallel donor-bound
electron and donor nuclear spins in silicon, showcases long coherence times,
good controllability, and, in contrast to other donor-spin-based schemes,
long-distance coupling. Electron spin control near the interface, however, is
likely to shorten the relaxation time by many orders of magnitude, reducing the
overall qubit quality factor. Here, we theoretically study the multilevel
system that is formed by the interacting electron and nuclear spins and derive
analytical effective two-level Hamiltonians with and without periodic driving.
We then propose an optimal control scheme that produces fast and robust
single-qubit gates in the presence of low-frequency noise without relying on
parametrically restrictive sweet spots. This scheme increases considerably both
the relaxation time and the qubit quality factor.
Related papers
- Electronic interferometry with ultrashort plasmonic pulses [0.8141910845471796]
We show that quantum coherence is preserved for ultrashort plasmonic pulses, exhibiting enhanced contrast of coherent oscillations compared to the DC regime.
This milestone demonstrates the feasibility of flying qubits as a promising alternative to localized qubit architectures.
arXiv Detail & Related papers (2024-08-23T12:29:02Z) - Measurement of enhanced spin-orbit coupling strength for donor-bound electron spins in silicon [0.0]
We show that the strength of the spin-orbit coupling can be locally enhanced by more than two orders of magnitude in the manybody wave functions of multi-donor quantum dots compared to a single donor.
Our findings may provide a pathway towards all-electrical control of donor-bound spins in silicon using electric dipole spin resonance (EDSR)
arXiv Detail & Related papers (2024-04-24T09:34:56Z) - Quantifying the limits of controllability for the nitrogen-vacancy electron spin defect [0.0]
Solid-state electron spin qubits rely on control sequences of population inversion to enhance sensitivity and improve device coherence.
We show that the limits of population inversion and potential impacts on applications like quantum sensing have not been assessed quantitatively.
We identify a potentially realizable regime of nanosecond control duration for high-fidelity multipulse sequences.
arXiv Detail & Related papers (2023-09-06T15:55:21Z) - Resolving Fock states near the Kerr-free point of a superconducting
resonator [51.03394077656548]
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement)
We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
arXiv Detail & Related papers (2022-10-18T09:55:58Z) - Efficient electron transfer in quantum dot chains controlled by a cubic
detuning profile via shortcuts to adiabaticity [0.0]
We study theoretically the control of shuttling of an electron along a linear chain of semiconductor quantum dots.
A given fidelity can be set experimentally by controlling the maximum sweep energy and duration of the control pulse.
arXiv Detail & Related papers (2022-06-03T20:23:08Z) - Demonstration of electron-nuclear decoupling at a spin clock transition [54.088309058031705]
Clock transitions protect molecular spin qubits from magnetic noise.
linear coupling to nuclear degrees of freedom causes a modulation and decay of electronic coherence.
An absence of quantum information leakage to the nuclear bath provides opportunities to characterize other decoherence sources.
arXiv Detail & Related papers (2021-06-09T16:23:47Z) - Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear
qudit with an electronic ancilla [50.002949299918136]
We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms.
It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
arXiv Detail & Related papers (2021-03-15T21:38:41Z) - Universal coherence protection in a solid-state spin qubit [95.73841600562527]
We construct a robust qubit embedded in a decoherence-protected subspace.
The qubit is protected from magnetic, electric, and temperature fluctuations.
This results in an increase of the qubit's inhomogeneous dephasing time by over four orders of magnitude.
arXiv Detail & Related papers (2020-05-12T22:44:23Z) - Universal non-adiabatic control of small-gap superconducting qubits [47.187609203210705]
We introduce a superconducting composite qubit formed from two capacitively coupled transmon qubits.
We control this low-frequency CQB using solely baseband pulses, non-adiabatic transitions, and coherent Landau-Zener interference.
This work demonstrates that universal non-adiabatic control of low-frequency qubits is feasible using solely baseband pulses.
arXiv Detail & Related papers (2020-03-29T22:48:34Z) - Fast noise-resistant control of donor nuclear spin qubits in silicon [0.0]
A high degree of controllability and long coherence time make the nuclear spin of a phosphorus donor in isotopically purified silicon a promising candidate for a quantum bit.
We present a simple method to implement fast, high-fidelity arbitrary single- and two-qubit gates in the absence of charge noise.
arXiv Detail & Related papers (2020-01-27T19:23:01Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.