Quadrupole shift of nuclear magnetic resonance of donors in silicon at low magnetic field

Mortemousque, Pierre-André; Rosenius, Samuel; Pica, Giuseppe; Franke, David; Sekiguchi, Toyokazu; Truong, Alain; Vlasenko, M. P.; Vlasenko, L. S.; Brandt, Martin S.; Elliman, R. G.; Itoh, Kohei M.

doi:10.1088/0957-4484/27/49/494001

Cited by 10 publications

(11 citation statements)

References 65 publications

(108 reference statements)

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“…We note that similar magnetic resonance measurements have recently been demonstrated for the deep chalcogen donor 77 Se + , but using a different method of optical hyperpolarization and readout [17]. We further note that while spin-dependent recombination methods have been demonstrated to enable magnetic resonance measurements on donors in silicon at small B 0 [18,19], they have not been shown to work all the way down to zero field. In addition to eliminating the need for a large and homogeneous magnetic field, these donor spin clock transitions near B 0 = 0 could also simplify the realization of hybrid donor spin/superconducting resonator coupling schemes [20].…”

Section: Introductionsupporting

confidence: 52%

Zero-field optical magnetic resonance study of phosphorus donors in 28-silicon

et al. 2018

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Donor spins in silicon are some of the most promising qubits for upcoming solid-state quantum technologies. The nuclear spins of phosphorus donors in enriched silicon have among the longest coherence times of any solid-state system as well as simultaneous qubit initialization, manipulation and readout fidelities near ∼ 99.9%. Here we characterize the phosphorus in silicon system in the regime of "zero" magnetic field, where a singlet-triplet spin clock transition can be accessed, using laser spectroscopy and magnetic resonance methods. We show the system can be optically hyperpolarized and has ∼ 10 s Hahn echo coherence times, even at Earth's magnetic field and below.

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Section: Introductionsupporting

confidence: 52%

Zero-field optical magnetic resonance study of phosphorus donors in 28-silicon

et al. 2018

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“…Measurements of the quadrupole interaction strength of group-V donors in strained silicon, especially near a nanostructure interface, are limited and have only been conducted very recently. [62][63][64] For ionized group-V donors, the available data only allow an order-of-magnitude esti-mate of Q in the hundreds of kHz range (see Appendix H for an extensive review).…”

Section: A a Large Nuclear Spin Donor As Quantum Driven Topmentioning

confidence: 99%

Exploring quantum chaos with a single nuclear spin

et al. 2018

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Most classical dynamical systems are chaotic. The trajectories of two identical systems prepared in infinitesimally different initial conditions diverge exponentially with time. Quantum systems, instead, exhibit quasi-periodicity due to their discrete spectrum. Nonetheless, the dynamics of quantum systems whose classical counterparts are chaotic are expected to show some features that resemble chaotic motion. Among the many controversial aspects of the quantum-classical boundary, the emergence of chaos remains among the least experimentally verified. Time-resolved observations of quantum chaotic dynamics are particularly rare, and as yet unachieved in a single particle, where the subtle interplay between chaos and quantum measurement could be explored at its deepest levels. We present here a realistic proposal to construct a chaotic driven top from the nuclear spin of a single donor atom in silicon, in the presence of a nuclear quadrupole interaction. This system is exquisitely measurable and controllable, and possesses extremely long intrinsic quantum coherence times, allowing for the observation of subtle dynamical behavior over extended periods. We show that signatures of chaos are expected to arise for experimentally realizable parameters of the system, allowing the study of the relation between quantum decoherence and classical chaos, and the observation of dynamical tunneling.

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“…(6) will only be reliable if the resulting F μ ( k ) remain strongly localized around k μ0 . Provided this constraint is satisfied, the multi-valley EMT is a powerful computatonal approach which has provided insight into the electronic structure and relaxation rates of the donors, 15–17 hyperfine and quadrupolar interactions of the donor nucleus, 18,19 static Stark effects, 20,21 and exchange coupling between donors. 22,23 …”

Section: Effective Mass Theorymentioning

confidence: 99%

Optical control of donor spin qubits in silicon

Gullans

2015

Phys. Rev. B

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We show how to achieve optical, spin-selective transitions from the ground state to excited orbital states of group-V donors (P, As, Sb, Bi) in silicon. We consider two approaches based on either resonant, far-infrared (IR) transitions of the neutral donor or resonant, near-IR excitonic transitions. For far-IR light, we calculate the dipole matrix elements between the valley-orbit and spin-orbit split states for all the goup-V donors using effective mass theory. We then calculate the maximum rate and amount of electron-nuclear spin-polarization achievable through optical pumping with circularly polarized light. We find this approach is most promising for Bi donors due to their large spin-orbit and valley-orbit interactions. Using near-IR light, spin-selective excitation is possible for all the donors by driving a two-photon Λ-transition from the ground state to higher orbitals with even parity. We show that externally applied electric fields or strain allow similar, spin-selective Λ-transition to odd-parity excited states. We anticipate these results will be useful for future spectroscopic investigations of donors, quantum control and state preparation of donor spin qubits, and for developing a coherent interface between donor spin qubits and single photons.

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Quadrupole shift of nuclear magnetic resonance of donors in silicon at low magnetic field

Cited by 10 publications

References 65 publications

Zero-field optical magnetic resonance study of phosphorus donors in 28-silicon

Zero-field optical magnetic resonance study of phosphorus donors in 28-silicon

Exploring quantum chaos with a single nuclear spin

Optical control of donor spin qubits in silicon

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