Interfacing a Topological Qubit with a Spin Qubit in a Hybrid Quantum System

Li, Bo; Li, Pengbo; Zhou, Yuan; Liu, Jie; Li, Hongrong; Li, Fuli

doi:10.1103/physrevapplied.11.044026

Cited by 21 publications

(13 citation statements)

References 84 publications

(110 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Color centers in diamond, such as germanium-vacancy (GeV) [37], nitrogen-vacancy (NV) center [38][39][40][41][42] and silicon-vacancy (SiV) center [43][44][45][46], play an important role in quantum science and technology [47][48][49][50][51]. Due to the high controllability and long coherence time [52][53][54][55][56][57][58][59][60], NV centers stand out among all kinds of solid-state systems.…”

Section: Introductionmentioning

confidence: 99%

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Qiao

Dong

et al. 2020

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

Multiparticle entanglement is of great significance for quantum metrology and quantum information processing. We here present an efficient scheme to generate stable multiparticle entanglement in a solid state setup, where an array of silicon-vacancy centers are embedded in a quasi-onedimensional acoustic diamond waveguide. In this scheme, the continuum of phonon modes induces a controllable dissipative coupling among the SiV centers. We show that, by an appropriate choice of the distance between the SiV centers, the dipole-dipole interactions can be switched off due to destructive interferences, thus realizing a Dicke superradiance model. This gives rise to an entangled steady state of SiV centers with high fidelities. The protocol provides a feasible setup for the generation of multiparticle entanglement in a solid state system.

show abstract

Section: Introductionmentioning

confidence: 99%

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Qiao

Dong

et al. 2020

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

show abstract

“…For the NV center, the spin-triplet S = 1 ground states {|0 , |±1 } are the eigenstates of the spin operator Ŝz , with Ŝz |i = i|i and i = 0, ±1. In the presence of the external magnetic field B z oriented along the NV symmetry axis [31,32,34,78,79], the degeneracy of the states |±1 are split via the Zeeman effect. Taking |0 as the energy reference, the Hamiltonian of the NV center can be expressed as…”

Section: A the Setupmentioning

confidence: 99%

“…where γ eff = α 2 γ m and κ eff = κ + β 2 γ m are the effective dacay rates, respectively. Here, the original dissipation rates are chosen as γ s /2π ∼ 1 kHz [79], γ m /2π ∼ 1 MHz [83] and κ/2π ∼ 6 kHz [2]. And we take the dimensionless parameters as α ∼ β ∼ 0.1 for the condition of eliminating the Kittel mode.…”

Section: Realistic Consideration and Experimental Parametersmentioning

confidence: 99%

Enhancing the spin-photon coupling with a micromagnet

Hei,

Dong,

Chen

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Hybrid quantum systems involving solid-state spins and superconducting microwave cavities play a crucial role in quantum science and technology, but improving the spin-photon coupling at the single quantum level remains challenging in such systems. Here, we propose a simple technique to strongly couple a single solid-state spin to the microwave photons in a superconducting coplanar waveguide (CPW) cavity via a magnetic microsphere. We show that, strong coupling at the single spin level can be realized by virtual magnonic excitations of a nearby micromagnet. The spin-photon coupling strength can be enhanced up to typically four orders of magnitude larger than that without the use of the micromagnet. This work can find applications in quantum information processing with strongly coupled solid-state spin-photonic systems.

show abstract

“…Topological phases of matter have attracted great interests and developed potential applications in quantum physics [1][2][3][4][5][6][7][8][9]. In particular, topological insulators possess topologically protected surface or edge states, robust to local disorders.…”

Section: Introductionmentioning

confidence: 99%

Simulation of topological phases with color center arrays in phononic crystals

2020

Phys. Rev. Research

Self Cite

View full text Add to dashboard Cite

We propose an efficient scheme for simulating the topological phases of matter based on siliconvacancy (SiV) center arrays in phononic crystals. This phononic band gap structure allows for long-range spin-spin interactions with a tunable profile. Under a particular periodic microwave driving, the band-gap mediated spin-spin interaction can be further designed with the form of the Su-Schrieffer-Heeger (SSH) Hamiltonian. In momentum space, we investigate the topological characters of the SSH model, and show that the topological nontrivial phase can be obtained through modulating the periodic driving fields. Furthermore, we explore the zero-energy topological edge states at the boundary of the color center arrays, and study the robust quantum information transfer via the topological edge states. This setup provides a scalable and promising platform for studying topological quantum physics and quantum information processing with color centers and phononic crystals.

show abstract

Interfacing a Topological Qubit with a Spin Qubit in a Hybrid Quantum System

Cited by 21 publications

References 84 publications

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Enhancing the spin-photon coupling with a micromagnet

Simulation of topological phases with color center arrays in phononic crystals

Contact Info

Product

Resources

About