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Implementing a Fast Unbounded Quantum Fanout Gate Using Power-Law Interactions [article]

Andrew Y. Guo, Abhinav Deshpande, Su-Kuan Chu, Zachary Eldredge, Przemyslaw Bienias, Dhruv Devulapalli, Yuan Su, Andrew M. Childs, Alexey V. Gorshkov
2020 arXiv   pre-print
We leverage the power of these interactions to implement a fast quantum fanout gate with an arbitrary number of targets.  ...  Complementarily, we develop a new technique to give a general lower bound, linear in the size of the system, on the time required to implement the QFT and the fanout gate in systems that are constrained  ...  -In summary, we have developed a fast protocol for the unbounded fanout gate using power-law interactions.  ... 
arXiv:2007.00662v1 fatcat:r7bs2vdkczdvjlfmknrifossmm

Quantum Fan-out: Circuit Optimizations and Technology Modeling [article]

Pranav Gokhale, Samantha Koretsky, Shilin Huang, Swarnadeep Majumder, Andrew Drucker, Kenneth R. Brown, Frederic T. Chong
2020 arXiv   pre-print
For example, while fan-out in traditional quantum circuits can only be implemented sequentially when viewed at the logical level, global interactions at the physical level allow fan-out to be achieved  ...  Instruction scheduling is a key compiler optimization in quantum computing, just as it is for classical computing.  ...  INTRODUCTION Instruction scheduling is a powerful compiler technique in both classical and quantum computing.  ... 
arXiv:2007.04246v1 fatcat:spp7pv5aizel3f2wmrdcfp2ocu

When--and how--can a cellular automaton be rewritten as a lattice gas? [article]

Tommaso Toffoli, Silvio Capobianco, Patrizia Mentrasti
2007 arXiv   pre-print
The two kinds of presentation share many traits but also display profound differences on issues ranging from decidability to modeling convenience and physical implementability.  ...  Both cellular automata (CA) and lattice-gas automata (LG) provide finite algorithmic presentations for certain classes of infinite dynamical systems studied by symbolic dynamics; it is customary to use  ...  Acknowledgments One of us (T.  ... 
arXiv:0709.1173v1 fatcat:etdenddk7zauvo5rl3ffyqnr5u

When–and how–can a cellular automaton be rewritten as a lattice gas?

Tommaso Toffoli, Silvio Capobianco, Patrizia Mentrasti
2008 Theoretical Computer Science  
The two kinds of presentation share many traits but also display profound differences on issues ranging from decidability to modeling convenience and physical implementability.  ...  Both cellular automata (CA) and lattice-gas automata (LG) provide finite algorithmic presentations for certain classes of infinite dynamical systems studied by symbolic dynamics; it is customary to use  ...  Acknowledgments We owe much to a generous referee for correcting a serious misunderstanding we had about one cited result and for many useful comments and suggestions. One of us (T.  ... 
doi:10.1016/j.tcs.2008.04.047 fatcat:iij7uhl76ncrbhv7pnuxpws64q

Improved a priori interconnect predictions and technology extrapolation in the GTX system

Yu Cao, Chenming Hu, Xuejue Huang, A.B. Kahng, I.L. Markov, M. Oliver, D. Stroobandt, D. Sylvester
2003 IEEE Transactions on Very Large Scale Integration (vlsi) Systems  
Interconnect predictions are at the core of technology extrapolation models of achievable system power, area density, and speed.  ...  A priori interconnect prediction and technology extrapolation are closely intertwined.  ...  A primary tenet of interconnect estimation is Rent's Rule [1] , [2] which predicts a power law relationship between the number of gates in a module of a partitioned circuit and the number of terminals  ... 
doi:10.1109/tvlsi.2002.808479 fatcat:ulatxhvim5ahfiyzzte5xe4mci

Free-space communication through turbulence: a comparison of plane-wave and orbital-angular-momentum encodings

Mohammad Mirhosseini, Brandon Rodenburg, Mehul Malik, Robert W. Boyd
2013 Journal of Modern Optics  
This study has important implications for high-dimensional quantum key distribution systems.  ...  Free-space communication allows one to use spatial mode encoding, which is susceptible to the effects of diffraction and turbulence.  ...  The signals from APDs and the gate are collected using a 300 MHz oscilloscope on the fast acquisition mode and processed on a computer. c) 3D view of the experimental data. . . . . . . . . . . . . . .  ... 
doi:10.1080/09500340.2013.834084 fatcat:wxpegzdc4zbk5cvwk2jo2bxiuq

Limits on Efficient Computation in the Physical World [article]

Scott Aaronson
2005 arXiv   pre-print
More than a speculative technology, quantum computing seems to challenge our most basic intuitions about how the physical world should behave.  ...  In this thesis I show that, while some intuitions from classical computer science must be jettisoned in the light of modern physics, many others emerge nearly unscathed; and I use powerful tools from computational  ...  It does not matter how many quantum gates would be needed to implement this matrix.  ... 
arXiv:quant-ph/0412143v2 fatcat:x6mjz4h4gzaszbfgbkshgm2v3u

A new binary arithmetic for finite-word-length linear controllers: MEMS applications

A. K. Oudjida, A. Liacha, M. L. Berrandjia, N. Chaillet
2014 2014 9th International Design and Test Symposium (IDT)  
Because MEMS applications are targeted, the binary arithmetic must be fast enough to cope with the rapid dynamic of MEMS; power-efficient for an embedded control; highly scalable for an easy adjustment  ...  of the control performances; and easily predictable to provide a precise idea on the required logic resources before the implementation.  ...  Such switches are theoretically possible at a quantum level, but quantum computers are not on sale for the time being.  ... 
doi:10.1109/idt.2014.7038608 dblp:conf/idt/OudjidaLBC14 fatcat:ykr7hhrd7ndy5jbmu53hb3t7vm

Design, calibration, and performance of the MINERvA detector

L. Aliaga, L. Bagby, B. Baldin, A. Baumbaugh, A. Bodek, R. Bradford, W.K. Brooks, D. Boehnlein, S. Boyd, H. Budd, A. Butkevich, D.A. Martinez Caicedo (+101 others)
2014 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
The MINERvA experiment is designed to perform precision studies of neutrino-nucleus scattering using ν_μ and ν̅_μ neutrinos incident at 1-20 GeV in the NuMI beam at Fermilab.  ...  The upstream portion of the detector includes planes of graphite, iron and lead interleaved between tracking planes to facilitate the study of nuclear effects in neutrino interactions.  ...  ) traversing a scintillator strip in the detector is sufficient to enable the use of a low quantum efficiency photosensor.  ... 
doi:10.1016/j.nima.2013.12.053 fatcat:icbcy2iuybalbkfhz5323zfwtm

LOCALITY, SYMMETRY, AND DIGITAL SIMULATION OF QUANTUM SYSTEMS [article]

Cong Minh Tran
2021
In the first part of the dissertation, we explore the locality of quantum systems and the fundamental limits on the propagation of information in power-law interacting systems.  ...  Additionally, we consider the implications of the speed limits on entanglement generation, the dynamics of correlation, the heating time, and the scrambling time in power-law interacting systems.  ...  In particular, the faster encoding of information into a GHZ-like state of ancillary qubits speeds up [45] the implementation of the quantum fanout-a powerful multiqubit quantum gate [69] .  ... 
doi:10.13016/rzpy-tlxg fatcat:cs4cm7rvsjh3znnmkwxiwtxs2q

Computer science approach to quantum control

Dominik Janzing
2006
WIRE from B to A : B A Use the FANOUT. NOT from B to B : B B Implement the first part of the FANOUT operation which changes the input state 2 to 0 and leaves 1 invariant.  ...  One can easily show that for all l we can implement a controlled-T l m gate efficiently. The gate F m is the DF T m , which is efficient if m is a power of two [3] .  ...  Now we shall sketch the idea how A can be constructed based on the circuit V above. Let U 1 , . . . , U l be a sequence of two-qubit gates implementing V . Set  ... 
doi:10.5445/ksp/1000005188 fatcat:qgwr27davzae5fuz2oj367sxci

Efficient Private Function Evaluation

Ágnes Kiss
2021
These approaches are based on techniques that are used for secure function evaluation (SFE) as well, where parties jointly compute the result of a publicly known function on their private inputs while  ...  PFE of Boolean circuits can also be realized using additively homomorphic encryption and standard SFE techniques.  ...  We thank Michael Zohner and Daniel Demmler for helping with the implementation in ABY, and the anonymous reviewers of Eurocrypt 2016 for their helpful comments on our paper. Acknowledgements.  ... 
doi:10.26083/tuprints-00017496 fatcat:nvvgirlijzg6venax5znicrkeq

A new method of measuring the half-life of ^10C [article]

K. K. H. Leung
2009 arXiv   pre-print
The experimental method used four plastic scintillator detectors in a 3-fold coincidence mode in order to detect the unique 2x511keV+718keV gamma-ray decay signature of 10C.  ...  A new measurement of the half-life of the positron emitter 10C has been made.  ...  Stability problems were also encountered with a high voltage supply before a suitable one was found. In the end an Ortec 556 High-voltage Power Supply was used to power all four detectors.  ... 
arXiv:0911.5325v1 fatcat:rwmxm6ugozfibkdbg7t3k7femi

On the performance and programming of reversible molecular computers

Amelie Hannah Earley, Apollo-University Of Cambridge Repository, Gos Micklem
2021
This therefore shows a universal scaling law governing the performance of compact computers of ~V^(5/6), compared to ~V^(2/3) for conventional computers.  ...  A result of Frank is refined and strengthened, showing that the adiabatic regime reversible computer performance is the best possible for any computer—quantum or classical.  ...  FANOUT gates given suitable ancillary bits (inputs fixed to either 0 or 1).  ... 
doi:10.17863/cam.79111 fatcat:ged47nao2jdjfexz4y5d3u4u4y

Quantum Information with Structured Light

Mohammad Mirhosseini, O S. Magana-Loaiza, M. N. O'Sullivan, Brandon Rodenburg, Zhimin Shi, Mehul Malik, M. P. Lavery, Miles J. Padgett, D. J. Gauthier, Robert W. Boyd
2016 Frontiers in Optics 2016   unpublished
The signals from APDs and the gate are collected using a 300 MHz oscilloscope on the fast acquisition mode and processed on a computer. c) 3D view of the experimental data. . . . . . . . . . . . . . .  ...  The signals from APDs and the gate are collected using a 300 MHz oscilloscope on the fast acquisition mode and processed on a computer. c) 3D view of the experimental data. .5. 5 ) 5 For our experiment  ...  We consider OAM modes with a top-hat intensity profile such as the ones used in our experiment.  ... 
doi:10.1364/ls.2016.ltu1e.3 fatcat:dfwsxdzsdvhzlfmnrkp7fjo55q
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