UCLA Physics & Astronomy - Condensed Matter Physics Seminar
http://www.pa.ucla.edu/seminar-series/condensed-matter-physics-seminar-0
en"Exploration and manipulation of the insulator-metal transition through low-temperature nano-optics" by Alexander McLeod (Columbia University)
http://www.pa.ucla.edu/events/exploration-and-manipulation-insulator-metal-transition-through-low-temperature-nano-optics
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, March 20, 2019 - <span class="date-display-start">4:00pm</span> to <span class="date-display-end">5:00pm</span></span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Exploration and manipulation of the insulator-metal transition through low-temperature nano-optics</p>
<p>Alexander McLeod</p>
<p>Columbia University</p>
<p> </p>
<p>Bypassing the diffraction limit of conventional limit of light, near-field microscopy has emerged as an invaluable tool for nanometer-resolved optical investigations of inhomogeneous materials. Recent instrumental developments have brought this technique to cryogenic temperatures (down to T=20K), a regime where quantum phase transitions such as the insulator-to-metal transition (IMT) can emerge among so-called correlated electron materials. Using external stimuli including temperature, strain, and even light, here I explore universal phenomenologies and the opportunities for nano-scale control over the IMT among representative correlated electron materials. I first reveal how spatial morphologies of insulator and metal domains provide clues to short-ranged interactions between coupled order parameters in the rare-earth nickelate NdNiO$_3$, selectively driving the IMT at nanometer scales [1]. On the other hand, I demonstrate how long-ranged interactions with strain produce nano-textured percolation and growth of striped insulator and metal domains in thin films of the “canonical Mott insulator” V$_2$O$_3$ [2]. By tuning the energetic landscape controlling the transition, I demonstrate active manipulation of these textures through nano-imaging of the IMT in layered ruthenate single-crystals under <em>in situ</em> application of uniaxial strain and electrical current. Lastly, nano-imaging of an epitaxial manganite reveals how a unique combination of coupled order parameters and strain susceptibility create conditions for a metastable IMT both “activated” through optical excitation and “deactivated” through locally applied pressure [3]. These examples highlight the singular capabilities of infrared nano-imaging deployed at cryogenic temperatures, promising expansive opportunities for the future investigation of quantum phase transitions in correlated electron materials.</p>
<p> </p>
<p>[1] K.W. Post*, A.S. McLeod*, M. Hepting, M. Bluschke, Y. Wang, G. Cristiani, … & D.N. Basov. Coexisting first- and second-order electronic phase transitions in a correlated oxide. Nature Physics, 1–6. (2018) <a href="https://doi.org/10.1038/s41567-018-0201-1">https://doi.org/10.1038/s41567-018-0201-1</a>. *These authors contributed equally.</p>
<p>[2] A.S. McLeod, E. Van Heumen, J.G. Ramirez, S. Wang, T. Saerbeck, S. Guenon, … I.K. Schuller, & D.N. Basov. Nanotextured phase coexistence in the correlated insulator V$_2$O$_3$. Nature Physics. (2017) <a href="https://doi.org/10.1038/nphys3882">https://doi.org/10.1038/nphys3882</a></p>
<p>[3] A.S. McLeod*, J.D. Zhang*, M.Q. Gu, … W.B. Wu, J. Rondinelli, R.D. Averitt, & D.N. Basov. Multi-messenger nano-probes of hidden magnetism in a strained manganite. In submission. (2019) *These authors contributed equally.</p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">4-330 PAB</div></div></div>Thu, 07 Feb 2019 16:48:45 +0000lut2666 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/exploration-and-manipulation-insulator-metal-transition-through-low-temperature-nano-optics#commentsWhen Luttinger semimetal meets Melko-Hertog-Gingras spin ice state in Pr2Ir2O7 BY Gang Chen
http://www.pa.ucla.edu/events/when-luttinger-semimetal-meets-melko-hertog-gingras-spin-ice-state-pr2ir2o7-gang-chen
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, July 18, 2018 - <span class="date-display-start">4:00pm</span> to <span class="date-display-end">5:00pm</span></span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Abstract:</p>
<p> </p>
<p>We study the band structure topology and engineering from the interplay between local moments and itinerant electrons in the context of pyrochlore iridates. For the metallic iridate Pr2Ir2O7, the Ir 5d conduction electrons interact with the Pr 4f local moments via the f-d exchange. While the Ir electrons form a Luttinger semimetal, the Pr moments can be tuned into an ordered spin ice with a finite ordering wavevector, dubbed “Melko-Hertog-Gingras” state, by varying Ir and O contents. We point out that the ordered spin ice of the Pr local moments generates an internal magnetic field that reconstructs the band structure of the Luttinger semimetal. Besides the broad existence of Weyl nodes, we predict that the magnetic translation of the “Melko-Hertog-Gingras” state for the Pr moments protects the Dirac band touching at certain time reversal invariant momenta for the Ir conduction electrons. We propose the magnetic fields to control the Pr magnetic structure and thereby indirectly influence the topological and other properties of the Ir electrons. Our prediction may be immediately tested in the ordered Pr2Ir2O7 samples. We expect our work to stimulate a detailed examination of the band structure, magneto-transport, and other properties of Pr2Ir2O7.</p>
<p> </p>
<p>Ref: <a href="https://arxiv.org/abs/1712.06534">https://arxiv.org/abs/1712.06534</a></p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Fri, 01 Feb 2019 00:14:06 +0000maria2653 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/when-luttinger-semimetal-meets-melko-hertog-gingras-spin-ice-state-pr2ir2o7-gang-chen#comments “Towards a consensus about SmB6, a topological Kondo insulator candidate" By Priscilla F.S. Rosa
http://www.pa.ucla.edu/events/%E2%80%9Ctowards-consensus-about-smb6-topological-kondo-insulator-candidate-priscilla-fs-rosa
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Thursday, January 31, 2019 - 1:30pm</span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Abstract:</p>
<p> </p>
<p>The combination of strong electronic correlations and non-trivial topology presents a novel</p>
<p>paradigm with promising experimental realizations. In this talk I will discuss the case of SmB6, a</p>
<p>mixed-valent 4f material predicted to be a topological Kondo insulator. Recent quantum</p>
<p>oscillation, thermal transport, scanning tunneling microscopy, and electrical transport</p>
<p>measurements indicate that the bulk of flux-grown SmB6 is truly insulating whereas its surface</p>
<p>states host heavy masses and are sensitive to perturbations that break time reversal symmetry.</p>
<p> </p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Thu, 31 Jan 2019 21:27:51 +0000maria2652 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Ctowards-consensus-about-smb6-topological-kondo-insulator-candidate-priscilla-fs-rosa#comments“Fleas on Schrödinger's Cat: Decoherence in Superconducting Quantum Circuits” BY Eli Levenson- Falk
http://www.pa.ucla.edu/events/%E2%80%9Cfleas-schr%C3%B6dingers-cat-decoherence-superconducting-quantum-circuits%E2%80%9D-eli-levenson-falk
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, November 7, 2018 - <span class="date-display-start">4:00pm</span> to <span class="date-display-end">5:00pm</span></span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Abstract:</p>
<p> </p>
<p>Superconducting quantum circuits are one of the most promising quantum information technologies, combining long coherence with flexible design, addressability, and scalability. However, decoherence mechanisms in these circuits prevent them from reaching their full potential. I will introduce some key mechanisms of decoherence and explain how they affect quantum circuits. I will also discuss some experiments in my lab that aim to characterize and eliminate decoherence mechanisms and create better quantum computing devices.</p>
<p> </p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Thu, 31 Jan 2019 21:22:34 +0000maria2651 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Cfleas-schr%C3%B6dingers-cat-decoherence-superconducting-quantum-circuits%E2%80%9D-eli-levenson-falk#comments“Cavity Spintronics" By Can-Ming Hu (University of Manitoba, Canada)
http://www.pa.ucla.edu/events/%E2%80%9Ccavity-spintronics-can-ming-hu-university-manitoba-canada
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Tuesday, November 13, 2018 - <span class="date-display-start">2:00pm</span> to <span class="date-display-end">3:00pm</span></span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Abstract:</p>
<p>Cavity spintronics (also known as spin cavitronics) is a newly developing, interdisciplinary field that brings together microwave and optical communities with researchers in spintronics and magnetism. The field started around 2014 when it was found that ferromagnets in cavities hybridize with both microwaves and light by light-matter interaction [1]. Since then, the emergence of cavity spintronics has attracted broad interest from groups studying quantum electrodynamics, cavity polaritons, optomechanics, superconductivity, plasmonics, and phononics. At the center stage of the topic is the physics of magnon-photon coupling: Via the quantum physics of spin-photon entanglement on the one hand and classical electrodynamic coupling on the other, magnon-photon coupling connects some of the most exciting concepts in modern physics, such as quantum information and quantum optics, with one of the oldest sciences on earth, magnetism.</p>
<p>This talk aims to provide an introduction to this new frontier of condensed matter physics to researhers working in magnetism, spintronics, quantum information, and microwave technologies. The talk starts with a historical review, tracing this new field back to some of the most courageous work in the history of magnetism, spintronics, cavity quantum electrodynamics, and polaritons. Recent experiments focusing on the development of new cavity-mediated techniques, such as coupling of magnetic moments, distant manipulation of spin current, qubit-magnon coupling, and conversion between optical and microwave photons, will be highlighted. </p>
<p> [1] Can-Ming Hu, “Dawn of cavity spintronics,” <a href="https://arxiv.org/abs/1508.01966">https://arxiv.org/abs/1508.01966</a></p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">KN 6-129</div></div></div>Thu, 08 Nov 2018 17:58:22 +0000maria2571 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Ccavity-spintronics-can-ming-hu-university-manitoba-canada#comments“Visualization of topological states of matter using microwave impedance microscopy" By Monica Allen (UCSD)
http://www.pa.ucla.edu/events/%E2%80%9Cvisualization-topological-states-matter-using-microwave-impedance-microscopy-monica-allen
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, October 31, 2018 - <span class="date-display-start">4:00pm</span> to <span class="date-display-end">5:00pm</span></span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Abstract:</p>
<p>A main thrust of condensed matter physics concerns the discovery of new electronic states in emerging materials. One example is the rapidly expanding class of topological materials, which are posited to enable realization of non-abelian particles and topological quantum computing. In this talk, I will discuss how exotic phenomena can arise from the interplay of ferromagnetism and topology. We employ microwave impedance microscopy (MIM), which characterizes the local complex conductivity of a material, to directly image chiral edge modes and phase transitions in a magnetic topological insulator. Finally, I will outline how MIM could be used in the future to visualize and manipulate Majorana modes, an emerging platform for quantum information processing.</p>
<p> </p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Fri, 26 Oct 2018 16:07:05 +0000maria2552 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Cvisualization-topological-states-matter-using-microwave-impedance-microscopy-monica-allen#comments“Chiral surface and edge plasmons in ferromagnetic conductors” by Giovanni Vignale (University of Missouri-Columbia)
http://www.pa.ucla.edu/events/%E2%80%9Cchiral-surface-and-edge-plasmons-ferromagnetic-conductors%E2%80%9D-giovanni-vignale-university
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, May 16, 2018 - 4:00pm</span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>The recently introduced concept of ``surface Berry plasmons" is studied in<br />
the concrete instance of a ferromagnetic conductor in which the Berry<br />
curvature, generated by atomic spin-orbit (SO) interaction, has opposite<br />
signs for carriers parallel or antiparallel to the magnetization. By using<br />
collisionless hydrodynamic equations with appropriate boundary conditions,<br />
we study both the surface plasmons of a three-dimensional ferromagnetic<br />
conductor and the edge plasmons of a two-dimensional one. The anomalous<br />
velocity and the broken inversion symmetry at the surface or the edge of the<br />
conductor create a ``handedness", whereby the plasmon frequency depends not<br />
only on the angle between the wave vector and the magnetization, but also on<br />
the direction of propagation along a given line. In particular, we find that<br />
the frequency of the edge plasmon depends on the direction of propagation<br />
along the edge. These Berry curvature effects are compared and contrasted<br />
with similar effects induced in the plasmon dispersion by an external<br />
magnetic field in the absence of Berry curvature. We argue that Berry<br />
curvature effects may be used to control the direction of propagation of the<br />
surface plasmons, and thus create a link between plasmonics and spintronics.</p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Tue, 01 May 2018 15:34:51 +0000vsundaram2445 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Cchiral-surface-and-edge-plasmons-ferromagnetic-conductors%E2%80%9D-giovanni-vignale-university#comments"Novel Properties of Topologically Interesting Materials and their Simple Devices" by Dr.Mazhar Ali from Max Plack institute
http://www.pa.ucla.edu/events/novel-properties-topologically-interesting-materials-and-their-simple-devices-drmazhar-ali
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, March 21, 2018 - 4:00pm</span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>"TI, Dirac, Weyl, and Nodal Line materials are all members of the burgeoning basket of topological materials where physical properties, like electron transport) are strongly influenced by the topology of the electronic structure. This can manifest in non massive-Dirac-Fermion quasiparticles in the bulk and on the surface/edges of the crystal. While many properties have been explored, especially in the bulk, novel properties of these materials may still be discovered in the ultrathin limit, especially when fabricated in heterostructures which add inversion symmetry breaking and/or magnetism to the stack. Some of these can be very important for technological applications.</p>
<p>Here I will discuss several directions of research being carried out by my group on topological or "nearly" topological materials. First we set out to understand why Beta-W, like Pt, has one of the largest Spin Hall Effects (SHE) known and from that understanding we realize that materials with a large SHE are not uncommon and develop a design strategy to find new materials with that trait. Experimental verification is jow underway. Secondly, we will discuss the Aymmetric Josephson Effect; the non-sinusoidal dependance of the current versus phase relationship we find in Josephson Junctions we fabricated out of WTe2 (a type II Weyl semimetal). Finally we will discuss the surprising saturation of resistivity at low temperature ( < 100K ) we found in quantum spin liquid candidate Nb3Cl8, and its dependance on charge injection via gating."</p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Mon, 19 Mar 2018 15:51:14 +0000vsundaram2414 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/novel-properties-topologically-interesting-materials-and-their-simple-devices-drmazhar-ali#comments“Non-ergodic delocalized states for efficient population transfer within a narrow band of the energy landscape” Vadim Smelyanskiy (Quantum AI Laboratory, Google)
http://www.pa.ucla.edu/events/%E2%80%9Cnon-ergodic-delocalized-states-efficient-population-transfer-within-narrow-band-energy
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, May 9, 2018 - 4:00pm</span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>We will discuss the computational role of coherent multiqubit tunneling that gives rise to bands of delocalized quantum states providing a coherent pathway for population transfer (PT) between computational states with similar energies. We study PT resulting from quantum evolution under a constant transverse field B of an n-spin system that encodes a classical energy landscape. We focus on several random spin modes without a structure, including random energy model. In the absence of any fine-tuning of the transfer field B >1, we find that scaling of a typical runtime for PT with n and the number of “solution” states is the same as that in multi-target Grover's algorithm, except for a factor of Exp(n a), where a=1/(4B^2) can be made small for B>>1. Unlike a Hamiltonian in analog Grover search, the models we consider are non integrable, and the transverse field delocalizes the initial state. As a result, our PT protocol is not sensitive to the value of B, and may be initialized with a computational basis state. We will describe microscopic theory of PT by applying cavity method to an effective tunneling Hamiltonian H acting in the space of computational states within a narrow energy belt that belongs to the class of preferred basis Levy matrices. In a certain range of energies and transverse fields, the eigenspectrum of H forms minibands of nonergodic delocalized states, because the steep decay of the off-diagonal matrix elements of H with the Hamming distance is compensated by a dramatic increase in the number of neighbors. We calculate the fractal dimension of the eigenstates as a function of energy and transverse field. We discuss how our approach can be applied to study PT protocol in other transverse field spin glass models, with the potential quantum advantage over classical algorithms.</p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Tue, 20 Feb 2018 17:33:12 +0000vsundaram2391 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/%E2%80%9Cnon-ergodic-delocalized-states-efficient-population-transfer-within-narrow-band-energy#comments"Ab initio theory of NV quantum bit in diamond” by Adam Gali (Wigner Research Centre for Physics)
http://www.pa.ucla.edu/events/ab-initio-theory-nv-quantum-bit-diamond%E2%80%9D-adam-gali-wigner-research-centre-physics
<div class="field field-name-field-event-date field-type-datetime field-label-inline clearfix"><div class="field-label">Date: </div><div class="field-items"><div class="field-item even"><span class="date-display-single">Wednesday, March 14, 2018 - 4:00pm</span></div></div></div><div class="field field-name-field-seminar-series-or-group field-type-taxonomy-term-reference field-label-inline clearfix"><div class="field-label">Series: </div><div class="field-items"><div class="field-item even">Condensed Matter Physics Seminar</div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>Nitrogen-vacancy center in diamond is a paramagnetic color center that can realize a quantum bit with millisecond coherence time of the electron spin at room temperature that makes it very attractive in quantum sensor and other quantum information processing applications. The readout and initialization of this quantum bit is based on its spin-selective fluorescence and very effective optical spinpolarization that have not yet been fully understood. We developed a theory to understand the full optical spinpolarization cycle with determining the coupling parameters and critical intersystem crossing rates by means of ab initio density functional theory calculations. Our new results complete the theory on the operation of NV center. If time allows then I present recent results on diamond surfaces by means of ab initio calculations that guide us about the requirements of surface termination for diamond nitrogen-vacancy sensor applications.</p>
</div></div></div><div class="field field-name-field-location field-type-text field-label-above"><div class="field-label">Location: </div><div class="field-items"><div class="field-item even">PAB 4-330</div></div></div>Fri, 02 Feb 2018 17:36:01 +0000vsundaram2378 at http://www.pa.ucla.eduhttp://www.pa.ucla.edu/events/ab-initio-theory-nv-quantum-bit-diamond%E2%80%9D-adam-gali-wigner-research-centre-physics#comments