Strong coupling between a microwave photon and a singlet-triplet qubit
- URL: http://arxiv.org/abs/2303.16825v2
- Date: Fri, 1 Sep 2023 13:47:21 GMT
- Title: Strong coupling between a microwave photon and a singlet-triplet qubit
- Authors: Jann H. Ungerer, Alessia Pally, Artem Kononov, Sebastian Lehmann,
Joost Ridderbos, Patrick P. Potts, Claes Thelander, Kimberly A. Dick, Ville
F. Maisi, Pasquale Scarlino, Andreas Baumgartner, Christian Sch\"onenberger
- Abstract summary: We introduce a zincblende InAs nanowire double quantum dot with strong spin-orbit interaction in a magnetic-field resilient, high-quality resonator.
Experiments on even charge parity states and at large magnetic fields allow to identify the relevant spin states.
Results pave the way towards large-scale quantum system based on singlet-triplet qubits.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Tremendous progress in few-qubit quantum processing has been achieved lately
using superconducting resonators coupled to gate voltage defined quantum dots.
While the strong coupling regime has been demonstrated recently for odd charge
parity flopping mode spin qubits, first attempts towards coupling a resonator
to even charge parity singlet-triplet spin qubits have resulted only in weak
spin-photon coupling strengths. Here, we integrate a zincblende InAs nanowire
double quantum dot with strong spin-orbit interaction in a magnetic-field
resilient, high-quality resonator. In contrast to conventional strategies, the
quantum confinement is achieved using deterministically grown wurtzite tunnel
barriers without resorting to electrical gating. Our experiments on even charge
parity states and at large magnetic fields, allow to identify the relevant spin
states and to measure the spin decoherence rates and spin-photon coupling
strengths. Most importantly, we find an anti-crossing between the resonator
mode in the single photon limit and a singlet-triplet qubit with an electron
spin-photon coupling strength of $g/2\pi=139\pm4$ MHz. Combined with the
resonator decay rate $\kappa/2\pi=19.8\pm0.2$ MHz and the qubit dephasing rate
$\gamma/2\pi=116\pm7$ MHz, our system achieves the strong coupling regime in
which the coherent coupling exceeds qubit and resonator linewidth. These
results pave the way towards large-scale quantum system based on
singlet-triplet qubits.
Related papers
- Decoherence of electron spin qubit during transfer between two semiconductor quantum dots at low magnetic fields [0.0]
We study the dephasing of a spin qubit adiabatically transferred between two tunnel-coupled quantum dots.
Our results indicate that achieving coherent transfer of electron spin in a $10,mu$m long dot array requires a large and uniform tunnel coupling.
arXiv Detail & Related papers (2024-05-20T17:13:46Z) - Strong coupling between a single photon and a photon pair [43.14346227009377]
We report an experimental observation of the strong coupling between a single photon and a photon pair in an ultrastrongly-coupled circuit-QED system.
Results represent a key step towards a new regime of quantum nonlinear optics.
arXiv Detail & Related papers (2024-01-05T10:23:14Z) - Dipole coupling of a bilayer graphene quantum dot to a high-impedance
microwave resonator [0.14908922253160745]
superconducting microwave resonator with a double quantum dot electrostatically defined in a graphene-based van der Waals heterostructure.
We achieve sensitive and fast detection with a signal-to-noise ratio of 3.5 within 1 $mumathrms$ integration time.
Our results introduce cQED as a probe for quantum dots in van der Waals materials and indicate a path toward coherent charge-photon coupling with bilayer graphene quantum dots.
arXiv Detail & Related papers (2023-12-22T11:59:20Z) - Longitudinal (curvature) couplings of an $N$-level qudit to a
superconducting resonator at the adiabatic limit and beyond [0.0]
We investigate the coupling between a multi-level system, or qudit, and a superconducting (SC) resonator's electromagnetic field.
For the first time, we derive Hamiltonians describing the longitudinal multi-level interactions in a general dispersive regime.
We provide examples illustrating the transition from adiabatic to dispersive coupling in different qubit systems.
arXiv Detail & Related papers (2023-12-05T20:33:59Z) - Strong hole-photon coupling in planar Ge: probing the charge degree and
Wigner molecule states [0.0]
We present strong coupling between a hole charge qubit and microwave photons in a superconducting quantum interference device (SQUID) array resonator.
This work paves the way towards coherent quantum connections between remote hole qubits in planar Ge, required to scale up hole-based quantum processors.
arXiv Detail & Related papers (2023-10-31T17:27:46Z) - Coherence of a field-gradient-driven singlet-triplet qubit coupled to
many-electron spin states in 28Si/SiGe [0.0]
Engineered spin-electric coupling enables spin qubits in semiconductor nanostructures to be manipulated efficiently and addressed individually.
We demonstrate fast singlet-triplet qubit oscillation in a gate-defined double quantum dot in $28$Si/SiGe with an on-chip micromagnet.
We present evidence of sizable and coherent coupling of the qubit with the spin states of a nearby quantum dot, demonstrating that appropriate spin-electric coupling may enable a charge-based two-qubit gate in a (1,1) charge configuration.
arXiv Detail & Related papers (2023-10-19T09:20:15Z) - 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) - Measuring the magnon-photon coupling in shaped ferromagnets: tuning of
the resonance frequency [50.591267188664666]
cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures.
Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity.
We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
arXiv Detail & Related papers (2022-07-08T11:28:31Z) - Hybrid quantum photonics based on artificial atoms placed inside one
hole of a photonic crystal cavity [47.187609203210705]
Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented.
The resulting photon flux is increased by more than a factor of 14 as compared to free-space.
Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
arXiv Detail & Related papers (2020-12-21T17:22:25Z) - Quantum Borrmann effect for dissipation-immune photon-photon
correlations [137.6408511310322]
We study theoretically the second-order correlation function $g(2)(t)$ for photons transmitted through a periodic Bragg-spaced array of superconducting qubits, coupled to a waveguide.
We demonstrate that photon bunching and anti-bunching persist much longer than both radiative and non-radiative lifetimes of a single qubit.
arXiv Detail & Related papers (2020-09-29T14:37:04Z) - Optimal coupling of HoW$_{10}$ molecular magnets to superconducting
circuits near spin clock transitions [85.83811987257297]
We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides.
Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
arXiv Detail & Related papers (2019-11-18T11:03:06Z)
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.