Browsing by Title
Now showing items 106067-106086 of 143569
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Quantum Enigma Machines and the Locking Capacity of a Quantum Channel
(American Physical Society, 2014-01)The locking effect is a phenomenon that is unique to quantum information theory and represents one of the strongest separations between the classical and quantum theories of information. The Fawzi-Hayden-Sen locking protocol ... -
Quantum Entanglement Growth under Random Unitary Dynamics
(American Physical Society, 2017-07)Characterizing how entanglement grows with time in a many-body system, for example, after a quantum quench, is a key problem in nonequilibrium quantum physics. We study this problem for the case of random unitary dynamics, ... -
Quantum error correcting codes and 4-dimensional arithmetic hyperbolic manifolds
(American Institute of Physics (AIP), 2014-08)Using 4-dimensional arithmetic hyperbolic manifolds, we construct some new homological quantum error correcting codes. They are low density parity check codes with linear rate and distance n [superscript ε]. Their rate is ... -
Quantum error modelling and correction in long distance teleportation using singlet states
(Massachusetts Institute of Technology, 2002) -
Quantum estimation theory
(Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, 1979) -
Quantum Extremal Surfaces and the Holographic Entropy Cone
(Springer Berlin Heidelberg, 2021-11-25)Abstract Quantum states with geometric duals are known to satisfy a stricter set of entropy inequalities than those obeyed by general quantum systems. The set of allowed entropies ... -
Quantum Extremal Surfaces and the Holographic Entropy Cone
(Springer Berlin Heidelberg, 2021-11-25)Abstract Quantum states with geometric duals are known to satisfy a stricter set of entropy inequalities than those obeyed by general quantum systems. The set of allowed entropies ... -
Quantum field theory of scalar cosmological perturbations
(Massachusetts Institute of Technology, 2005)Using canonical quantization we show that the spectrum of the scalar cosmological fluctuations as calculated until now is not correct. We derive the correct expression for the spectrum, and show that our correct treatment ... -
Quantum Fluctuation Theorems for Arbitrary Environments: Adiabatic and Nonadiabatic Entropy Production
(American Physical Society, 2018-08)We analyze the production of entropy along nonequilibrium processes in quantum systems coupled to generic environments. First, we show that the entropy production due to final measurements and the loss of correlations obeys ... -
The quantum Fourier transform and quantum chaos
(Massachusetts Institute of Technology, 2003)In this thesis I study control of quantum systems while implementing complex quantum operations. Through experimental implementations of such operations, I test the accuracy of control and provide methods for identifying ... -
Quantum Free Games
(ACM|Proceedings of the 55th Annual ACM Symposium on Theory of Computing, 2023-06-02) -
Quantum frequency doubling in the topological insulator Bi2Se3
(Springer Science and Business Media LLC, 2021)© 2021, The Author(s). The nonlinear Hall effect due to Berry curvature dipole (BCD) induces frequency doubling, which was recently observed in time-reversal-invariant materials. Here we report novel electric frequency ... -
Quantum gas microscopy of strongly correlated fermions
(Massachusetts Institute of Technology, 2017)This thesis describes experiments on ultracold fermionic atoms, and can be divided into two areas. The first concerns spin-orbit coupling; the second concerns quantum gas microscopy. With the use of Raman transitions, ID ... -
Quantum gates, sensors, and systems with trapped ions
(Massachusetts Institute of Technology, 2012)Quantum information science promises a host of new and useful applications in communication, simulation, and computational algorithms. Trapped atomic ions are one of the leading physical systems with potential to implement ... -
Quantum Generative Adversarial Learning
(American Physical Society, 2018-07)Generative adversarial networks represent a powerful tool for classical machine learning: a generator tries to create statistics for data that mimics those of a true data set, while a discriminator tries to discriminate ... -
Quantum geometric Langlands correspondence in positive characteristic: the GLN case
(Massachusetts Institute of Technology, 2012)Let C be a smooth connected projective curve of genus > 1 over an algebraically closed field k of characteristic p > 0, and c [epsilon] k \ Fp. Let BunN be the stack of rank N vector bundles on C and Ldet the line bundle ... -
Quantum ghost imaging through turbulence
(American Physical Society, 2011-05)We investigate the effect of turbulence on quantum ghost imaging. We use entangled photons and demonstrate that for a specific experimental configuration the effect of turbulence can be greatly diminished. By decoupling ... -
Quantum gradient descent and Newton’s method for constrained polynomial optimization
(IOP Publishing, 2019-07)Optimization problems in disciplines such as machine learning are commonly solved with iterative methods. Gradient descent algorithms find local minima by moving along the direction of steepest descent while Newton's method ... -
Quantum gravity and inventory accumulation
(Institute of Mathematical Statistics, 2016-11)We begin by studying inventory accumulation at a LIFO (last-in-first-out) retailer with two products. In the simplest version, the following occur with equal probability at each time step: first product ordered, first ... -
Quantum gravity and topological field theory
(Massachusetts Institute of Technology, 1995)
