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Coupled pairs of nuclear spins-1/2 support one singlet state and three triplet states. Transitions between the singlet state and one of the triplet states may be driven by an oscillating low-frequency magnetic field, in the presence of…

量子物理 · 物理学 2021-10-27 Laurynas Dagys , Christian Bengs , Malcolm H. Levitt

We numerically investigate atomic interferometry based on spin-exchange collisions in $F=1$ spinor Bose-Einstein condensates in the regime of long evolution times $t\gg h/c$, where c is the spin-dependent interaction energy. We show that…

原子物理 · 物理学 2020-01-01 Qimin Zhang , Arne Schwettmann

Transition metal defects in SiC give rise to localized electronic states that can be optically addressed in the telecom range in an industrially mature semiconductor platform. This has led to intense scrutiny of the spin and optical…

Nuclear magnetic resonance (NMR) is particularly relevant for studies of internuclear spin coupling at zero and ultra-low fields (ZULF), where spin-spin interactions dominate over Zeeman ones. Here we report on ZULF NMR in CdTe. In this…

介观与纳米尺度物理 · 物理学 2024-03-27 V. M. Litvyak , P. Bazhin , R. André , M. Vladimirova , K. V. Kavokin

Large spin Mn2+ ions (S=5/2) diluted in a non-magnetic MgO matrix of high crystalline symmetry are used to realize a six level system that can be operated by means of multi-photon coherent Rabi oscillations. This spin system has a very…

介观与纳米尺度物理 · 物理学 2009-07-21 S. Bertaina , L. Chen , N. Groll , J. Van Tol , N. S. Dalal , I. Chiorescu

We use field-cycling-assisted dynamic nuclear polarization and continuous radio-frequency (RF) driving over a broad spectral range to demonstrate magnetic-field-dependent activation of nuclear spin transport from strongly-hyperfine-coupled…

The efficient transfer of quantum states into a long-lived storage unit such as solid-state spin ensembles is widely recognized as a critical challenge with significant implications for quantum communication, sensing and computing…

量子物理 · 物理学 2025-12-22 P. Oehrl , F. Fesquet , K. E. Honasoge , M. Handschuh , A. Marx , R. Gross , K. G. Fedorov , H. Huebl

We present direct local-probe evidence for strongly hybridized nuclear-electronic spin states of an Ising ferromagnet LiHoF$_4$ in a transverse magnetic field. The nuclear-electronic states are addressed via a magnetic resonance in the GHz…

强关联电子 · 物理学 2017-01-02 I. Kovacevic , P. Babkevich , M. Jeong , J. O. Piatek , G. Boero , H. M. Rønnow

In this paper we explore the spin-orbit-induced bound state and molecular signature of the degenerate Fermi gas in a narrow Feshbach resonance based on a generalized two-channel model. Without the atom-atom interactions, only one bound…

量子气体 · 物理学 2013-07-10 Kuang Zhang , Gang Chen , Suotang Jia

We propose a general scheme for inducing resonant exchange between spins or pseudo-spins of unmatched levels via periodic driving. The basic idea is illustrated for a system of two heteronuclear atoms, for which analytical results are…

量子气体 · 物理学 2018-08-08 Jun-Jie Chen , Zhi-Fang Xu , Li You

Electron spins in quantum dots under coherent control exhibit a number of novel feedback processes. Here, we present experimental and theoretical evidence of a feedback process between nuclear spins and a single electron spin in a single…

We describe how the spin coherence time of a localized electron spin in solids, i.e. a solid state spin qubit, can be prolonged by applying designed electron spin resonance pulse sequences. In particular, the spin echo decay due to the…

介观与纳米尺度物理 · 物理学 2011-03-14 W. M. Witzel , S. Das Sarma

We study the effect of contact hyperfine interaction on the nuclear spin diffusion coefficients in semiconductor quantum dots. The diffusion coefficients are calculated with both the method of moment and density matrix. We show that nuclear…

介观与纳米尺度物理 · 物理学 2015-06-24 Changxue Deng , Xuedong Hu

Dynamic nuclear polarization via contact with electronic spins has emerged as an attractive route to enhance the sensitivity of nuclear magnetic resonance (NMR) beyond the traditional limits imposed by magnetic field strength and…

We explore the control and switching of the entangled spin states of multi-spin particle qubit coupled to an electron using a three-particle spin model described by $S_i$ ($i=1,2,3$), in which $S_1=\tfrac{1}{2}$ is an electron and $S_{2,3}$…

量子物理 · 物理学 2022-07-18 Eric D. Switzer , Xiao-Guang Zhang , Talat S. Rahman

Quantum information protocols utilizing atomic ensembles require preparation of a coherent spin state (CSS) of the ensemble as an important starting point. We investigate the magneto-optical resonance method for characterizing a spin state…

量子物理 · 物理学 2009-11-10 B. Julsgaard , J. Sherson , J. L. Sorensen , E. S. Polzik

One of the main challenges in magnonics is the efficiency of the conversion of microwave signals into spin waves. This efficiency is low due to the significant mismatch between microwave and spin wave wavelengths in the GHz range $10^{-2}$…

介观与纳米尺度物理 · 物理学 2025-06-12 Liubov Ivzhenko , Sergey Polevoy , Sergey Nedukh , Maciej Krawczyk

We experimentally isolate, characterize and coherently control up to six individual nuclear spins that are weakly coupled to an electron spin in diamond. Our method employs multi-pulse sequences on the electron spin that resonantly amplify…

介观与纳米尺度物理 · 物理学 2012-10-23 T. H. Taminiau , J. J. T. Wagenaar , T. van der Sar , F. Jelezko , V. V. Dobrovitski , R. Hanson

Counting the microwave photons emitted by an ensemble of electron spins when they relax radiatively has recently been introduced as a sensitive new method for electron paramagnetic resonance spectroscopy at millikelvin temperatures. Here,…

We propose a technique to control the macroscopic collective nuclear spin of a Helium-3 vapor in the quantum regime using light. The scheme relies on metastability exchange collisions to mediate interactions between optically accessible…

量子物理 · 物理学 2021-07-07 Alan Serafin , Matteo Fadel , Philipp Treutlein , Alice Sinatra