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Displaying 1776 - 1800 of 3644

Revealing the emergence of classicality in nitrogen-vacancy centers

October 1, 2019
Author(s)
Thomas Unden, Daniel Louzon, Michael P. Zwolak, Wojciech Zurek, Fedor Jelezko
… The origin of classical behavior of quantum systems is a long-standing mystery. Here, we examine … to study the proliferation of information about preferred quantum states via the environment. This redundantly … to showing how to create entangled SE states relevant to quantum metrology, we demonstrate that under the decoherence …

An On/Off Berry Phase Switching with Circular Graphene Resonators

May 26, 2017
Author(s)
Fereshte Ghahari Kermani, Daniel T. Walkup, Christopher Gutierrez, Joaquin R. Nieva, Yue Y. Zhao, Jonathan E. Wyrick, Donat F. Natterer, William G. Cullen, Kenji Watanabe, Takashi Taniguchi, Leonid Levitov, Nikolai B. Zhitenev, Joseph A. Stroscio
… phase is an example of anholonomy, where the phase of a quantum state may not return to its original value after its parameters cycle around a closed path; instead the quantum system’s wavefunction may acquire a real measurable … phase is intimately connected with the geometry of the quantum system, and measurable geometric phase effects can be …

An electrically driven spin qubit based on valley mixing

February 2, 2017
Author(s)
wister huang, Neil M. Zimmerman, Andrew S. Dzurak, Dimitrie Culcer
… control of single spin qubits based on semiconductor quantum dots is of great interest for scalable quantum computing since electric elds are much easier to … electrically- driven spin rotation frequency for silicon quantum dot qubits when in the presence of a step at a …

Interferometric Measurement of the Current-Phase Relationship of a Superfluid Weak Link

September 22, 2014
Author(s)
Stephen Eckel, Fred Jendrzejewski, Avinash Kumar, Christopher J. Lobb, Gretchen K. Campbell
… or superfluids differ from classical links due to quantum coherence, which allows flow without resistance. … the current-phase relationship, which serves as the quantum analog of the current-voltage relationship. Here, we … can be extended to weak links in any phase-coherent quantum gas and can also measure current-phase relationships …

Laser Action in Sputtered Metal Vapors

January 1, 1976
Author(s)
J. R. Mcneil, Ward L. Johnson, G. J. Collins, K. B. Persson, Douglas L. Franzen
… 9th Intl. Conf. on Quantum Electronics …

Controlling Atomic Interactions with Light

December 1, 2012
Author(s)
Ross A. Williams, Lindsay J. LeBlanc, Karina K. Jimenez Garcia, Matthew C. Beeler, Abigail R. Perry, William D. Phillips, Ian B. Spielman
… control is vital for applications including atomic clocks, quantum computing, and the use of ultracold quantum gases for studying many-body physics, that is, as a realization of Feynman’s concept of a quantum simulator. Now, we report on the ability to use light …

Near Unity Absorption in Tungsten films

December 19, 2003
Author(s)
Danna Rosenberg, Sae Woo Nam, Aaron J. Miller, Arto Salminen, Erich N. Grossman, Robert E. Schwall, John M. Martinis
… candidates to replace avalanche photo diodes (APDs) in quantum information experiments, including quantum key distribution and quantum computing. Increasing the absorption of these devices …

Microwave SQUID multiplexing for the Lynx x-ray microcalorimeter

March 22, 2019
Author(s)
Douglas A. Bennett, John A. Mates, Simon R. Bandler, Daniel T. Becker, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, K D. Irwin, Kelsey M. Morgan, Carl D. Reintsema, Kazuhiro Sakai, Daniel R. Schmidt, Stephen J. Smith, Daniel S. Swetz, Joel N. Ullom, Leila R. Vale, Abigail L. Wessels
… We discuss the details of microwave superconducting quantum interference device (SQUID) multiplexing and describe … angular resolution, field of view, superconducting quantum interference device, SQUID …

Experimental demonstration of local area entanglement distribution between two distant nodes, coexisting with classical synchronization

May 12, 2023
Author(s)
Anouar Rahmouni, Paulina Kuo, Yicheng Shi, Jabir Marakkarakath Vadakkepurayil, Nijil Lal Cheriya Koyyottummal, Ivan Burenkov, Ya-Shian Li-Baboud, Mheni Merzouki, Abdella Battou, Sergey Polyakov, Oliver T. Slattery, Thomas Gerrits
… using a high-accuracy precision time protocol between two quantum nodes located 250 meters apart using a single fiber simultaneously carrying both quantum and classical data …

M-ary state phase-shift keying discrimination below the homodyne limit

December 22, 2011
Author(s)
Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V. Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L. Migdall
… state discrimination, quantum information, quantum communication, single photon, quantum mechanics, single photon detection …

Spotlight on Optics: Generation of highly pure Schrodinger's cat states and real-time quadrature measurements via optical filtering

December 25, 2017
Author(s)
Thomas Gerrits
… Schrödinger cat states are fundamental quantum states with no classical analogues. Schrödinger … states [1], but we now use Schrödinger cat to refer to a quantum state that is a superposition of two highly … classical states. Such states could be useful for quantum information processing and metrology beyond the …

Extreme Magnetic Field-Boosted Superconductivity

December 1, 2019
Author(s)
Sheng NMN Ran, I Lin NMN Liu, Yun Suk Eo, Daniel J. Campbell, Paul M. Neves, Wesley T. Fuhrman, Shanta Ranjan Saha, Christoper Eckberg, Hyunsoo Kim, David Graf, Fedor Balakirev, John Singleton, Johnpierre N. Paglione, Nicholas Butch
… Applied magnetic fields underlie exotic quantum states, such as the fractional quantum Hall effect 1 and Bose-Einstein condensation of spin … rooted in magnetic fluctuations 7 and boosted by a quantum dimensional crossover 8 . …

Optimization of Time-and Code-Division-Multiplexed Readout for Athena X-IFU

March 18, 2019
Author(s)
William B. Doriese, Simon R. Bandler, Saptarshi Chaudhuri, Carl S. Dawson, Edward V. Denison, Shannon M. Duff, Malcolm S. Durkin, C. T. FitzGerald, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kent D. Irwin, Young I. Joe, Kelsey M. Morgan, Galen C. O'Neil, Christine G. Pappas, Carl D. Reintsema, David A. Rudman, Stephen J. Smith, Robert W. Stevens, Daniel S. Swetz, Paul Szypryt, Joel N. Ullom, Leila R. Vale, Joel C. Weber, B. A. Young
… the power dissipated by the first-stage superconducting quantum-interference devices (SQUIDs) and the readout noise … transition-edge sensor, superconducting quantum-interference device, multiplexed readout, X-ray …

Tuning the Mean-Field Energy in a Fermi Gas of Atoms

October 12, 2021
Author(s)
C A. Regal, Deborah S. Jin
… atoms. Experimenters have cooled these gases into the quantum degenerate regime and explored collisional effects. However, quantum mechanical many-body interaction phenomena, such as … measurements of the mean-field interaction energy in a quantum degenerate Fermi gas and report on progress toward …

E 8 Spectra of Quasi-One-Dimensional Antiferromagnet BaCo 2 V 2 O 8 under Transverse Field

August 9, 2021
Author(s)
Haiyuan Zou, Y. Cui, Xiao Wang, Z. Zhang, J. Yang, Guangyong Xu, A. Okutani, M. Hagiwara, M. Matsuda, G. Wang, Giuseppe Mussardo, K. Hodsagi, M. Kormos, Zhangzhen He, S. Kimura, Rong Yu, Weiqiang Yu, Jie Ma, Jianda Wu
… Exotic excitations can emerge in the vicinity of a quantum phase transition. When the quantum critical point of the one-dimensional (1D) transverse … The large separation between the masked 1D and 3D quantum critical points of the system allows us to identify, …

Efficient qubit measurement with a nonreciprocal microwave amplifier

January 13, 2021
Author(s)
Florent Lecocq, Leonardo Ranzani, Gabriel A. Peterson, Katarina Cicak, Xiaoyue Jin, Raymond Simmonds, John Teufel, Jose Aumentado
… The act of observing a quantum object fundamentally perturbs its state, resulting in … the measurement is responsible for all dephasing of the quantum state. In practice, imperfections in the measurement … limit or corrupt the flow of information required for quantum feedback protocols, an effect quantified by the …

Molecular Computers for Solving Computational Decision Problems

October 12, 2021
Author(s)
Z Amitay, R Kosloff, S R. Leone
… The result is evaluated efficiently utilizing quantum interferences, probed through time-delayed … The present work involves coherent ccomputation using quantum elements, not quantum computation. …

Highly efficient heralding of entangled single photons

March 11, 2013
Author(s)
Sven Ramelow, Alexandra Mech, Marissa Giustina, Simon Groeblacher, Witlef Wieczorek, Adriana Lita, Brice R. Calkins, Thomas Gerrits, Sae Woo Nam, Anton Zeilinger, Rupert Ursin
… are an important prerequisite for a broad spectrum of quantum optical applications. We experimentally demonstrate a … efficiency, are a necessary ingredient for advanced quantum communication protocols such as one-sided device-independent quantum key distribution. …

Metrology Triangle Using a Watt Balance, a Calculable Capacitor, and a Single- Electron Tunneling Device

May 16, 2008
Author(s)
Mark W. Keller, Francois P. Piquemal, Nicolas Feltin, Barthelemy Steck, Laurent Devoille
… that yields a value for the single-electron charge quantum $Q_{\rm{S}}$ in terms of the SI coulomb. Importantly, … this result is independent of the Josephson and quantum Hall effects, and thus avoids the possible … from these two effects that arise in the traditional quantum metrology triangle. This triangle can be used to test …

Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry: Supplement VIII, Halogen Species - IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry

March 1, 2000
Author(s)
R Atkinson, D L. Baulch, R A. Cox, Robert F. Hampson, J A. Kerr, M J. Rossi, J Troe
… values of the photoabsorption cross- sections and the quantum yields of the photochemical reactions together with … gas phase, photoabsorption cross-section, photochemistry, quantum yield, rate coefficient …
Displaying 1776 - 1800 of 3644
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