Search results for: Barry C. Sanders

Items from 1 to 20 out of 30 results

article

Topological quantum walks: Theory and experiments

Jizhou Wu, Wei-Wei Zhang, Barry C. Sanders

Frontiers of Physics > 2019 > 14 > 6 > 1-6

article

Learning in quantum control: High-dimensional global optimization for noisy quantum dynamics

Pantita Palittapongarnpim, Peter Wittek, Ehsan Zahedinejad, Shakib Vedaie, more

Neurocomputing > 2017 > 268 > C > 116-126

Quantum control is valuable for various quantum technologies such as high-fidelity gates for universal quantum computing, adaptive quantum-enhanced metrology, and ultra-cold atom manipulation. Although supervised machine learning and reinforcement learning are widely used for optimizing control parameters in classical systems, quantum control for parameter optimization is mainly pursued via gradient-based...

chapter

Robustness of learning-assisted adaptive quantum-enhanced metrology in the presence of noise

Pantita Palittapongarnpim, Peter Wittek, Barry C. Sanders

2017 IEEE International Conference on Systems, Man, and Cybernetics (SMC) > 294 - 299

2017 IEEE International Conference on Systems, Man and Cybernetics (SMC)

Reinforcement learning algorithms have been shown to generate procedures for executing quantum control tasks to desired performances. Although reinforcement learning has been effective, its robustness in generating quantum control procedures under general noise condition needs to be tested. Here we consider adaptive quantum-enhanced interferometric phase estimation as a case study in quantum feedback...

article

Journeys from quantum optics to quantum technology

Stephen M. Barnett, Almut Beige, Artur Ekert, Barry M. Garraway, more

Progress in Quantum Electronics > 2017 > 54 > C > 19-45

Sir Peter Knight is a pioneer in quantum optics which has now grown to an important branch of modern physics to study the foundations and applications of quantum physics. He is leading an effort to develop new technologies from quantum mechanics. In this collection of essays, we recall the time we were working with him as a postdoc or a PhD student and look at how the time with him has influenced...

chapter

Dimension control of superradiance

Tyler Hill, Barry C. Sanders, Hui Deng

2016 Conference on Lasers and Electro-Optics (CLEO) > 1 - 2

2016 Conference on Lasers and Electro-Optics (CLEO)

We show how superradiant emission can be controlled by dimensional confinement, including near-field and dipole-orientation effects. Our model naturally interpolates for all real dimension between one dimension and three dimensions.

chapter

Distributed Relay Protocol for Probabilistic Information-Theoretic Security in a Randomly-Compromised Network

Travis R. Beals, Barry C. Sanders

Lecture Notes in Computer Science > Information Theoretic Security > Quantum Information and Communication > 29-39

We introduce a simple, practical approach with probabilistic information-theoretic security to mitigate one of quantum key distribution’s major limitations: the short maximum transmission distance (~200 km) possible with present day technology. Our scheme uses classical secret sharing techniques to allow secure transmission over long distances through a network containing randomly-distributed compromised...

chapter

Security Aspects of Practical Quantum Cryptography

Gilles Brassard, Norbert Lütkenhaus, Tal Mor, Barry C. Sanders

Lecture Notes in Computer Science > Advances in Cryptology — EUROCRYPT 2000 > Quantum Cryptography > 289-299

The use of quantum bits (qubits) in cryptography holds the promise of secure cryptographic quantum key distribution schemes. Unfortunately, the implemented schemes are often operated in a regime which excludes unconditional security. We provide a thorough investigation of security issues for practical quantum key distribution, taking into account channel losses, a realistic detection process, and...

chapter

Monogamy of Multi-qubit Entanglement in Terms of Rényi and Tsallis Entropies

Jeong San Kim, Barry C. Sanders

Lecture Notes in Computer Science > Theory of Quantum Computation, Communication, and Cryptography > 159-167

We summarize our recent result about monogamy of multi-qubit entanglement: Using Rényi-α entropy, we provide a class of monogamy inequalities of multi-qubit entanglement for α ≥ 2. We also provide another class of monogamy inequalities in terms of Tsallis-q entropy for 2 ≤ q ≤ 3.

chapter

Collisional and Collapse Dynamics of a Twin Bose-Einstein Condensate with Negative Scattering Length

Weiping Zhang, Karl-Peter Marzlin, Leon Tribe, Barry C. Sanders

Lecture Notes in Physics > Directions in Quantum Optics > Bose-Einstein Condensation > 70-76

We study the collisional and collapse dynamics of a twin Bose-Einstein condensate with an attractive interatomic interaction. We show that the collision between two Bose-Einstein components with densities higher than the critical density for instability can first lead to a collapse due to the attractive interatomic interaction followed by a cessation of collapse due to the mutual nonlinear interaction.

article

Quantum computation with coherent spin states and the close Hadamard problem

Mark R. A. Adcock, Peter Høyer, Barry C. Sanders

Quantum Information Processing > 2016 > 15 > 4 > 1361-1386

We study a model of quantum computation based on the continuously parameterized yet finite-dimensional Hilbert space of a spin system. We explore the computational powers of this model by analyzing a pilot problem we refer to as the close Hadamard problem. We prove that the close Hadamard problem can be solved in the spin system model with arbitrarily small error probability in a constant number of...

chapter

Stabilizer formalism for generalized concatenated quantum codes

Yun-Jiang Wang, Bei Zeng, Markus Grassl, Barry C. Sanders

2013 IEEE International Symposium on Information Theory > 529 - 533

2013 IEEE International Symposium on Information Theory (ISIT)

The concept of generalized concatenated quantum codes (GCQC) provides a systematic way for constructing good quantum codes from short component codes. We introduce a stabilizer formalism for GCQCs, which is achieved by defining quantum coset codes. This formalism offers a new perspective for GCQCs and enables us to derive a lower bound on the code distance of stabilizer GCQCs from component codes...

chapter

Estimating immanants from interferometric photon coincidences

Barry C. Sanders, Si-Hui Tan, Hubert de Guise, Yvonne Y. Gao

CLEO: 2013 > 1 - 2

2013 Conference on Lasers and Electro-Optics (CLEO)

We develop a theory for multi-channel passive optical interferometery with one or zero photon entering each input port, and we show that the output photon coincidences yield information about immanants of the interferometer transformation matrix.

article

Gaussian quantum computation with oracle-decision problems

Mark R. A. Adcock, Peter Høyer, Barry C. Sanders

Quantum Information Processing > 2013 > 12 > 4 > 1759-1779

We study a simple-harmonic-oscillator quantum computer solving oracle decision problems. We show that such computers can perform better by using nonorthogonal Gaussian wave functions rather than orthogonal top-hat wave functions as input to the information encoding process. Using the Deutsch–Jozsa problem as an example, we demonstrate that Gaussian modulation with optimized width parameter results...

article

Low-loss surface modes and lossy hybrid modes in metamaterial waveguides

Benjamin R. Lavoie, Patrick M. Leung, Barry C. Sanders

Photonics and Nanostructures - Fundamentals and Applications > 2012 > 10 > 4 > 602-614

We show that waveguides with a dielectric core and a lossy metamaterial cladding (metamaterial-dielectric guides) can support hybrid ordinary-surface modes previously only known for metal-dielectric waveguides. These hybrid modes are potentially useful for frequency filtering applications as sharp changes in field attenuation occur at tailorable frequencies. Our results also show that the surface...

article

Enhanced Feedback Iterative Decoding of Sparse Quantum Codes

Yun-Jiang Wang, Barry C. Sanders, Bao-Ming Bai, Xin-Mei Wang

IEEE Transactions on Information Theory > 2012 > 58 > 2 > 1231 - 1241

Decoding sparse quantum codes can be accomplished by syndrome-based decoding using a belief propagation (BP) algorithm. We significantly improve this decoding scheme by developing a new feedback adjustment strategy for the standard BP algorithm. In our feedback procedure, we exploit much of the information from stabilizers, not just the syndrome but also the values of the frustrated checks on individual...

chapter

An efficient algorithm for optimizing adaptive quantum metrology processes

Barry C. Sanders, Alexander Hentschel

2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim incorporating the Australasian Conference on Optics, Lasers and Spectroscopy and the Australian Conference on Optical Fibre Technology > 418 - 419

2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim

We introduce an efficient self-learning swarm-intelligence algorithm for devising feedback-based quantum metrological procedures to replace what is otherwise an difficult and inefficient problem. Our algorithm can be trained with simulated or real-world trials and accommodates experimental imperfections, losses, and decoherence.

article

Transmission Coefficients for Chemical Reactions with Multiple States: Role of Quantum Decoherence

Aurélien de la Lande, Jan Řezáč, Bernard Lévy, Barry C. Sanders, more

Journal of the American Chemical Society > 2011 > 133 > 11 > 3883 - 3894

article

Distribution and dynamics of entanglement in high-dimensional quantum systems using convex-roof extended negativity

Soojoon Lee, Jeong San Kim, Barry C. Sanders

Physics Letters A > 2011 > 375 > 3 > 411-414

Using convex-roof extended negativity, we generalize previous qubit results of entanglement distribution and entanglement dynamics into arbitrary-dimensional quantum systems for isotropic states and the depolarizing channel. We further investigate a relation between these two types of entanglement properties.

chapter

Machine Learning for Adaptive Quantum Measurement

Alexander Hentschel, Barry C Sanders

2010 Seventh International Conference on Information Technology: New Generations > 506 - 511

Seventh International Conference on Information Technology: New Generations (ITNG 2010)

One of the most immediate practical applications of quantum information processing is performing precise quantum measurements. Quantum measurement schemes employing adaptive feedback are most effective, since accumulated information from measurements is exploited to maximize the information gain in subsequent measurements. Yet devising such feedback policies is complicated and often involves clever...

article

On the Geometric Distance Between Quantum States with Positive Partial Transposition and Private States

Jeong San Kim, Barry C. Sanders

Letters in Mathematical Physics > 2010 > 92 > 1 > 67-79

We prove an analytic positive lower bound for the geometric distance between entangled positive partial transpose (PPT) states of a broad class and any private state that delivers one secure key bit. Our proof holds for any Hilbert space of finite dimension. Although our result is proven for a specific class of PPT states, we show that our bound nonetheless holds for all known entangled PPT states...

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ATMOSPHERIC MEASUREMENTS (2)
EDUCATIONAL INSTITUTIONS (2)
GENERATORS (2)
LEARNING (ARTIFICIAL INTELLIGENCE) (2)
MACHINE LEARNING (2)
ORACLE DECISION PROBLEMS (2)
PARTICLE MEASUREMENTS (2)
PHASE ESTIMATION (2)
PHOTONICS (2)
QUANTUM ALGORITHMS (2)
QUANTUM COMPUTING (2)
VECTORS (2)
ADAPTATION MODELS (1)
ADAPTIVE CONTROL (1)
ADAPTIVE FEEDBACK (1)
ADAPTIVE QUANTUM PHASE MEASUREMENT (1)
ANTENNA RADIATION PATTERNS (1)
BELIEF PROPAGATION (1)
BISMUTH (1)
BOUND ENTANGLED STATE (1)
CHANNEL MODELS (1)
COHERENT STATE (1)
CONCATENATED CODES (1)
CONTINUOUS VARIABLE QUANTUM COMPUTATION (1)
CONTINUOUS-VARIABLE QUANTUM COMPUTATION (1)
CONVEX-ROOF EXTENDED NEGATIVITY (1)
CORRELATOR (1)
DECISION TREES (1)
DECISSION TREE (1)
DECODING (1)
DIFFERENTIAL EVOLUTION (1)
DISTRIBUTION OF ENTANGLEMENT (1)
DYNAMICS OF ENTANGLEMENT (1)
EBG MATERIALS AND ANTENNAS (1)
EBG MATERIALS AND COMPONENTS (1)
ELECTRON-PHONON SCATTERING (1)
ENCODING (1)
ENTANGLED STATES (1)
FACTORIZATION (1)
FEEDBACK (1)
FEEDBACK CONTROL (1)
FEEDS (1)
FERMION COHERENT STATES (1)
FERMION FIELD (1)
GRASSMANN NUMBERS (1)
HIGH GAIN PRS, EBG AND METAMATERIAL ANTENNAS (1)
INFORMATION THEORETIC SECURITY (1)
INFORMATION THEORY (1)
ITERATIVE DECODING (1)
LOW-LOSS MODE (1)
METAMATERIAL (1)
METAMATERIALS (1)
MISCELLANEOUS EBG ANTENNAS AND COMPONENTS (1)
MONOGAMY OF ENTANGLEMENT (1)
NON-CONVEX OPTIMIZATION (1)
NONCLASSICAL STATES (1)
OPTICAL INTERFEROMETRY (1)
OPTICAL PULSES (1)
OPTIMIZATION (1)
PARTICLE SWARM OPTIMIZATION (1)
PERIODIC STRUCTURES (1)
PHASE NOISE (1)
PHASE SHIFTING INTERFEROMETRY (1)
PHONON-ASSISTED TUNNELING (1)
PHYSICS (1)
PORTS (COMPUTERS) (1)
POSITIVE PARTIAL TRANSPOSITION (PPT) (1)
PRINTED ANTENNAS ON EBG SUBSTRATES (1)
PRIVATE STATE (1)
PROBABILITY DISTRIBUTION (1)
QKD (1)
QUANTUM CHANNELS (1)
QUANTUM CONTROL (1)
QUANTUM ERROR CORRECTION (1)
QUANTUM ESTIMATION (1)
QUANTUM INFORMATION PROCESSING (1)
QUANTUM INTERFEROMETER (1)
QUANTUM KEY DISTRIBUTION (1)
QUANTUM MEASUREMENT (1)
QUANTUM PHYSICS (1)
REINFORCEMENT LEARNING (1)
RESONANT FREQUENCY (1)
RESONANT TUNNELING (1)
ROBUSTNESS (1)
RÉNYI ENTROPY (1)
SECRET SHARING (1)
SELF-CONSISTENT CALCULATION (1)
SIMPLE HARMONIC OSCILLATOR QUANTUM COMPUTER (1)
SIMPLE-HARMONIC OSCILLATOR QUANTUM COMPUTER (1)
SLOT ANTENNAS (1)
SPARSE QUANTUM CODES (1)
STABILIZERS (1)
TENSILE STRESS (1)
TRACE-NORM DISTANCE (1)
TSALLIS ENTROPY (1)
WAVEGUIDE (1)
WOODPILE EBG ARRAY ANTENNAS (1)
WOODPILE EBG WAVEGUIDES, HORN ANTENNAS AND ARRAYS (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 71.38.+I (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 72.10.DI (1)
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Communications in Mathematical Physics (2)
Foundations of Physics (2)
Physics Letters A (2)
Quantum Information Processing (2)
Czechoslovak Journal of Physics (1)
Frontiers of Physics (1)
IEEE Transactions on Information Theory (1)
Journal of the American Chemical Society (1)
Letters in Mathematical Physics (1)
Neurocomputing (1)
Optical and Quantum Electronics (1)
Photonics and Nanostructures - Fundamentals and Applications (1)
Physica E: Low-dimensional Systems and Nanostructures (1)
Progress in Quantum Electronics (1)
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INFONA - science communication portal

Search results for: Barry C. Sanders

Topological quantum walks: Theory and experiments

Learning in quantum control: High-dimensional global optimization for noisy quantum dynamics

Robustness of learning-assisted adaptive quantum-enhanced metrology in the presence of noise

Journeys from quantum optics to quantum technology

Dimension control of superradiance

Distributed Relay Protocol for Probabilistic Information-Theoretic Security in a Randomly-Compromised Network

Security Aspects of Practical Quantum Cryptography

Monogamy of Multi-qubit Entanglement in Terms of Rényi and Tsallis Entropies

Collisional and Collapse Dynamics of a Twin Bose-Einstein Condensate with Negative Scattering Length

Quantum computation with coherent spin states and the close Hadamard problem

Stabilizer formalism for generalized concatenated quantum codes

Estimating immanants from interferometric photon coincidences

Gaussian quantum computation with oracle-decision problems

Low-loss surface modes and lossy hybrid modes in metamaterial waveguides

Enhanced Feedback Iterative Decoding of Sparse Quantum Codes

An efficient algorithm for optimizing adaptive quantum metrology processes

Transmission Coefficients for Chemical Reactions with Multiple States: Role of Quantum Decoherence

Distribution and dynamics of entanglement in high-dimensional quantum systems using convex-roof extended negativity

Machine Learning for Adaptive Quantum Measurement

On the Geometric Distance Between Quantum States with Positive Partial Transposition and Private States

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