Bulletin of the American Physical Society
APS March Meeting 2017
Volume 62, Number 4
Monday–Friday, March 13–17, 2017; New Orleans, Louisiana
Session R13: Interfacing AMO with Solid State Systems: Architectures and Characterization |
Hide Abstracts |
Sponsoring Units: DAMOP GQI Chair: Ania Jayich, University of California, Santa Barbara Room: 272 |
Thursday, March 16, 2017 8:00AM - 8:12AM |
R13.00001: Manipulating small numbers of electrons on top of a superconducting resonator Gerwin Koolstra, Ge Yang, David Schuster Electrons on helium is a unique 2-dimensional system on the interface of superfluid helium and vacuum. The motional and spin states of a single electron trapped on superfluid helium could form an ultra-stable building block of a novel hybrid quantum computer. In previous experiments [1] we have shown that we can reliably trap and detect large numbers of electrons on top of a microwave resonator. Despite these efforts, isolating a single electron in our system has proven to be non-trivial. Here, we present a newly developed simulation technique that visualizes manipulations on small electron configurations and sheds light on the hidden physics behind our experimental signal. Additionally, we report on experimental progress towards detecting single electrons. [1] Ge Yang et al., Phys. Rev. X 6, 011031 (2016) [Preview Abstract] |
Thursday, March 16, 2017 8:12AM - 8:24AM |
R13.00002: Toward strong coupling of a single NV center in diamond to a superconducting circuit Philippe Campagne-Ibarcq, Sebastian Probst, Pierre Jamonneau, Yuimaru Kubo, Audrey Bienfait, Sébastien Pezzagna, Patrice Bertet Electronic spins interact with microwave fields. However, this interaction is very weak so that only large ensembles of spins have been detected in this way so far. In circuit quantum electrodynamics (cQED) on the other hand, artificial superconducting atoms are made to interact strongly with microwave fields at the single photon level, and quantum-limited detection of few-photon microwave signals has been developed. In this project, we apply the concepts and techniques of cQED to the detection and manipulation of NV centers in diamond, in order to reach a novel regime in which a single electronic spin strongly interacts with a single microwave photon. The enhanced sensitivity is expected to allow single spin detection in less than a millisecond. Moreover, superconducting circuits could be used as quantum buses to allow entanglement of distant, on chip, NV centers. The long lifetimes of the electron and nuclear spins of these centers would then offer a promising quantum information processing platform. In this talk, advances toward the detection of a spin echo signal from a single spin will be presented. [Preview Abstract] |
Thursday, March 16, 2017 8:24AM - 8:36AM |
R13.00003: Nitrogen-Vacancy centers coupled to fiber-based optical micro-cavities Yannik Fontana, Erika Janitz, Maximilian Ruf, Mark Dimock, Jack Sankey, Lilian Childress We present our efforts to couple nitrogen-vacancy centers (NVs) embedded in micron-thin, ultra-smooth diamond membranes to the optical modes of a fiber-based microcavity. We take advantage of the membrane-based approach to channel the NVs emission to low-loss modes and show cavity finesses up to 20000 for the operational platform. In addition, the cavity can be tuned to modify the NV spectrum over a wide spectral range (ar. 650 to 710 nm). At room temperature and for our typical cavity mode volume, phonon-induced linewidth broadening of the NV spectrum prevents modification of the radiative lifetime (the Purcell effect). However if the cavity length can be reduced down to a few microns, a phonon-assisted process helps increasing the fraction of emitted photon in the cavity mode beyond simple spectral filtering. We discuss progress toward the observation of cavity-funneling with the membrane-based approach. This first step in the direction of coupling broad transitions to "good cavities" is essential for the realization of tunable single-photon sources with high indistinguishability at room temperature. [Preview Abstract] |
Thursday, March 16, 2017 8:36AM - 8:48AM |
R13.00004: Measuring the dispersive interaction of an ensemble of Rydberg atoms with a cavity mode using circuit QED techniques Mathias Stammeier, Sebastien Garcia, Tobias Thiele, Andreas Wallraff, Johannes Deiglmayr, Josef Agner, Hansjuerg Schmutz, Frederic Merkt Cavity quantum electrodynamics enables quantum nondemolition measurements of either part of the system, emitter or photon, by detecting the dispersive shift induced on the other part. This fact is exploited in many different physical systems. However using the dispersive shift of a microwave cavity to determine the state of a single Rydberg atom or an ensemble thereof is less explored. In our experiments, we measure the dispersive shift of a 3D cavity induced by an ensemble of singlet helium atoms in the 37s Rydberg state by detecting the microwave transmission of a weak probe tone. We observe a dispersive shift, the time dependence of which depends on the position-dependent collective coupling strength and the atom-cavity detuning as the atoms propagate through the cavity. The results agree well with the dispersive Tavis-Cummings Hamiltonian, and consistently imply maximal collective coupling strengths above 1 MHz, corresponding to approximately 3300 Rydberg atoms. We determine the scaling of the collective dispersive shift with the atom-cavity detuning and the number of Rydberg atoms, where the latter points towards the possibility of nondestructively measuring the number of Rydberg atoms. [Preview Abstract] |
Thursday, March 16, 2017 8:48AM - 9:00AM |
R13.00005: Hybrid Quantum Systems with Trapped Charged Particles Shlomi Kotler, Dietrich Leibfried, Raymond Simmonds, Dave Wineland We will review a joint effort by the Ion Storage Group and the Advanced Microwave Photonics Group at NIST (Boulder, CO) to design a hybrid system that interfaces charged particles with macroscopic high-Q resonators. We specifically consider coupling trapped charges to superconducting LC resonators, the mechanical modes of Silicon-Nitride membranes, and piezo-electric materials. We aim to achieve the strong coupling regime, where a single quantum of motion of the trapped charge can be coherently exchanged with harmonic motion of the macroscopic entity (electrical and/or mechanical). These kind of devices could potentially take advantage of both macroscopic control techniques and the long quantum coherence of its trapped charged particles. [Preview Abstract] |
Thursday, March 16, 2017 9:00AM - 9:12AM |
R13.00006: Strain coupling between nitrogen vacancy centers and the mechanical motion of a diamond optomechanical crystal resonator J. V. Cady, K. W. Lee, P. Ovartchaiyapong, A. C. Bleszynski Jayich Several experiments have recently demonstrated coupling between nitrogen vacancy (NV) centers in diamond and mechanical resonators via crystal strain$^{\mathrm{1}}$. In the strong coupling regime, such devices could realize applications critical to emerging quantum technologies, including phonon-mediated spin-spin interactions and mechanical cooling with the NV center$^{\mathrm{1}}$. An outstanding challenge for these devices is generating higher strain coupling in high frequency devices while maintaining the excellent coherence properties of the NV center and high mechanical quality factors. As a step toward these objectives, we demonstrate single-crystal diamond optomechanical crystal resonators with embedded NV centers. These devices host highly-confined GHz-scale mechanical modes that are isolated from mechanical clamping losses and generate strain profiles that allow for large strain coupling to NV centers far from noise-inducing surfaces. 1. D. Lee, \textit{et al.}, arXiv:1609.00418, (2016) [Preview Abstract] |
Thursday, March 16, 2017 9:12AM - 9:24AM |
R13.00007: Coherently coupling distinct spin ensembles through a high critical temperature superconducting resonator Alberto Ghirri, Claudio Bonizzoni, Filippo Troiani, Marco Affronte The problem of coupling remote ensembles of two-level systems through cavity photons is revisited by using molecular spin centers and a high critical temperature superconducting coplanar resonator [1]. By using PyBTM organic radicals, we achieved the strong coupling regime with values of the cooperativity reaching 4300 at 2 K [2]. We show that up to three distinct spin ensembles are simultaneously coupled through the resonator mode. The ensembles are made physically distinguishable by chemically varying the g-factor and by exploiting the inhomogeneities of the applied magnetic field. The coherent mixing of the spin and field modes is demonstrated by the observed multiple anticrossing, along with the simulations performed within the input-output formalism, and quantified by suitable entropic measures. [1] A. Ghirri, C. Bonizzoni, D. Gerace, S. Sanna, A. Cassinese and M. Affronte, Appl. Phys. Lett. 106, 184101 (2015). [2] A. Ghirri, C. Bonizzoni, F. Troiani, N. Buccheri, L. Beverina, A. Cassinese and M. Affronte, Phys. Rev. A 93, 063855 (2016). [Preview Abstract] |
Thursday, March 16, 2017 9:24AM - 9:36AM |
R13.00008: Cooling a Mechanical Resonator with a Nitrogen-Vacancy Center Ensemble Using a Room Temperature Excited State Spin-Strain Interaction Evan MacQuarrie, Matt Otten, Stephen Gray, Gregory Fuchs Cooling a mechanical resonator mode to a sub-thermal state has been a long-standing challenge in physics. This pursuit has recently found traction in the field of optomechanics in which a mechanical mode is coupled to an optical cavity. An alternate method is to couple the resonator to a well-controlled two-level system. We propose a protocol to dissipatively cool a room temperature mechanical mode using a nitrogen-vacancy (NV) center spin ensemble. The ensemble is coupled to the resonator through a spin-strain interaction in its orbitally-averaged excited state that is $13.5\pm0.5$ times stronger than the ground state NV center spin-strain coupling. This interaction, combined with a high-density spin ensemble, enables the cooling of a mechanical resonator from room temperature to a fraction of its thermal phonon occupancy. [Preview Abstract] |
Thursday, March 16, 2017 9:36AM - 9:48AM |
R13.00009: Magnetic moment measurements of gyroscopically stabilized graphene nanoplatelets levitated in an ion trap Joyce Coppock, Pavel Nagornykh, Jacob Murphy, Bruce Kane Measurement of small magnetic effects in 2D materials can be facilitated by decoupling the material from its substrate using particle trapping techniques. We investigate the mechanical and magnetic properties of a rotating micron-scale graphene nanoplatelet levitated in a quadrupole electric field trap in high vacuum. Its motion is observed optically, via the scattering of a low-power laser beam. Illumination by a circularly polarized laser causes the nanoplatelet to rotate at frequencies of 10-40 MHz. Frequency locking to an applied RF electric field stabilizes the nanoplatelet so that its axis of rotation is normal to its surface. We find that residual slow dynamics of the axis orientation are determined by an applied magnetic field. From frequency- and field-dependent measurements, we observe one magnetic moment arising from the rapid rotation of the charged nanoplatelet and one originating from diamagnetism, and we estimate their magnitudes. We determine a gyromagnetic ratio corresponding to the rotational moment and discuss our measurements of diamagnetism in the context of theories of the properties of graphene. Our measurements imply a torque sensitivity of better than $10 ^{-23}$ N-m. [Preview Abstract] |
Thursday, March 16, 2017 9:48AM - 10:00AM |
R13.00010: Electron spin control and torsional optomechanics of an optically levitated nanodiamond in vacuum Tongcang Li, Thai Hoang, Jonghoon Ahn, Jaehoon Bang Electron spins of diamond nitrogen-vacancy (NV) centers are important quantum resources for nanoscale sensing and quantum information. Combining such NV spin systems with levitated optomechanical resonators will provide a hybrid quantum system for many novel applications. Here we optically levitate a nanodiamond and demonstrate electron spin control of its built-in NV centers in vacuum. We observe that the strength of electron spin resonance (ESR) is enhanced when the air pressure is reduced. We also observe that oxygen and helium gases have different effects on both the photoluminescence and the ESR contrast of nanodiamond NV centers, indicating potential applications of NV centers in oxygen gas sensing. For spin-optomechanics, it is important to control the orientation of the nanodiamond and NV centers in a magnetic field. Recently, we have observed the angular trapping and torsional vibration of a levitated nanodiamond, which paves the way towards levitated torsional optomechanics in the quantum regime. [Preview Abstract] |
Thursday, March 16, 2017 10:00AM - 10:12AM |
R13.00011: Experimental mapping of magnetostatic mode structures of a ferrimagnet spheroid Arnaud Gloppe, Alto Osada, Ryusuke Hisatomi, Atsushi Noguchi, Rekishu Yamazaki, Koji Usami, Yasunobu Nakamura The exploration of the interaction of light with spin waves in ferromagnets within an optical cavity might lead to new chiral photonic devices and be a stepping stone towards the coherent optical manipulation of magnons in the quantum regime. The developments made so far in cavity optomagnonics have been focused on the fundamental magnetostatic mode of an yttrium iron garnet (YIG) sphere, so-called `Kittel mode'. Higher-order magnetostatic modes, with reduced mode volume and different orbital angular momentum, could couple more efficiently with the optical whispering gallery modes hosted by the YIG sphere. Hence, unambiguously identifying higher-order magnon modes in a spheroid is crucial to scrutinize these interactions. We demonstrate a scheme to map the magnon mode structures of a ferrimagnetic spheroid. Using two small loop coils in close proximity with a millimetric YIG sphere, we perform microwave transmission measurements at various latitude-longitude coordinates. These signals are found to be very sensitive to the magnon mode structures. This makes possible the identification of the modes, supported by the predicted dependency of their resonance frequencies in the dc magnetic field. This work paves the way to the systematic investigation of the optomagnonic interaction. [Preview Abstract] |
Thursday, March 16, 2017 10:12AM - 10:24AM |
R13.00012: Using diamond NV centers to probe magnetic properties of 2d materials Trond Andersen, Javier Sanchez-Yamagishi, Bo Dwyer, Hongkun Park, Mikhail Lukin 2d materials have been shown to exhibit a plethora of interesting properties, using a wide range of both electronic, optical and mechanical measurement techniques. Measuring the magnetic field from a 2d material, however, remains challenging due to the small sample volume and corresponding weak magnetic signal. The NV center is an ideal magnetometer for such measurements due to its high magnetic field sensitivity and optical readout capabilities. By transferring 2d materials onto the surface of a diamond that contains shallow NV centers, we achieve nanoscale proximity and thus high sensitivity. This can allow for probing not only intrinsic phenomena, such as current noise from graphene, but also extrinsic ones, like magnetic signals from spin defects. I will discuss our recent progress in conducting such measurements, focusing on techniques to optimize sensitivity, as well as measures made to maximize the magnetic signal from the 2d material. [Preview Abstract] |
Thursday, March 16, 2017 10:24AM - 10:36AM |
R13.00013: Strain engineering of silicon vacancy cantilevers with diamond MEMS Srujan Meesala, Young-Ik Sohn, Benjamin Pingault, Haig Atikian, Jeff Holzgrafe, Mustafa Gundogan, Camille Stavrakas, Alp Sipahigil, Michael Burek, Mian Zhang, Jose Pacheco, John Abraham, Edward Bielejec, Mikhail Lukin, Mete Atature, Marko Loncar We fabricate diamond MEMS cantilevers with SiV centers, and study their optical and spin properties as a function of strain. Under controlled strain fields applied to SiVs by electrostatic actuation of the cantilevers, we characterize the response of the optical transitions. These measurements allow us to infer the SiV strain Hamiltonian. Large strain susceptibilities of the order of 1 PHz/strain indicate the suitability of the SiV for strain-mediated optomechanics. Further, by applying strain, we increase the energy splitting between the ground states from 50 GHz to over 450 GHz. As a result, we modify the thermalization dynamics between the ground state orbitals, and the thermal-phonon limited spin coherence at 4K. Improvement in spin coherence with strain is detected optically as a narrowing of the coherent population trapping (CPT) resonance from the spin transition. We observe measurement-limited spin coherence times of \textasciitilde 0.17 $\mu $s at high strain. [Preview Abstract] |
Thursday, March 16, 2017 10:36AM - 10:48AM |
R13.00014: Measurement of microwave-induced strain in a metallic parallel-plate cavity Mingkang Wang, Qi Zhang, Shubo Wang, Che Ting CHAN, Hobun CHAN We measure the local mechanical deformation induced by microwave radiation on two parallel metallic plates that constitute a resonating unit in a metamaterial. Each plate measures 1 cm square in size. One of them is sufficiently thin to be deformable by the microwave radiation. The strain, measured with a fiber optic interferometer, attains maximum at the microwave resonance as the electromagnetic field between the two plates is strongly enhanced. By measuring the amplitude and phase of multiple mechanical vibrational modes of the plate and extrapolating to zero-frequency, we distinguish deformation induced by the electromagnetic force from deformation caused by photothermal forces. The measured spatial distribution of the strain agrees with theoretical calculations. Remarkably, the maximal local stress can reach 6.7mN/m\textasciicircum 2 exceeding the conventional photon pressure by a factor of \textasciitilde 600 at the microwave resonance. Our findings show that the strong coupling between the electromagnetic wave and resonating units offers new opportunities to modify the properties of the metamaterial to construct tunable or reconfigurable systems. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700