Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Gaussian states"”.
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Quantum state discrimination with bosonic channels and Gaussian states
Discriminating between quantum states is an indispensable part of quantum information theory. This thesis investigates state discrimination of continuous quantum variables, focusing on bosonic communication channels and Gaussian states. The specific state discrimination problems studied are (a) …
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Local approach to quantum entanglement
… focus on the entanglement of continuous-variable states since the underlying degrees of freedom of physical systems carrying quantum information are frequently continuous, rather than discrete. Much of the effort has been concentrated on Gaussian states, because these are common as the ground or …
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The semiclassical limit of quantum dynamics
… class of potentials. By convolving with certain Gaussian states we obtain classically determined asymptotic behavior of the quantum evolution of states of compact support. For suitable potentials we obtain the analogus result for the scattering operator in the position representation. For initial …
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Quantum discord, EPR steering and Bell-type correlations for secure CV quantum communications
Quantum states can be correlated in ways beyond what is possible for classical states. These correlations are considered as the main resource for quantum computation and communication tasks. In this thesis, I present my studies on the different forms of Quantum Correlations known as "Quantum …
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Quantum discord, EPR steering and Bell-type correlations for secure CV quantum communications
Quantum states can be correlated in ways beyond what is possible for classical states. These correlations are considered as the main resource for quantum computation and communication tasks. In this thesis, I present my studies on the different forms of Quantum Correlations known as "Quantum …
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RECOVERY AND RECONSTRUCTION IN QUANTUM SYSTEMS
… first scenario is the perfect recovery in the Gaussian fermionic systems. When therelative entropy between two states remains unchanged under a channel, the perfect recovery can be achieved. It is realized by the Petz recovery map. We study the Petz recovery map in the case where the quantum …
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Quantum optical state comparison amplification
… thesis we propose a method to amplify coherent states probabilistically. Our method is based on coherent state comparison and photon subtraction. We found that for an input chosen at random from a binary set of states, under certain circumstances the fidelity can reach 100%. The probability of …
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Algorithmic Quantum-State Generation for Simulating Quantum Field Theories on a Quantum Computer
… translational invariance and preparing particle states above the ground state at variable length scales. Moreover, we construct two quantum algorithms for preparing one-dimensional Gaussian states, which have applications beyond QFT simulation. Our first algorithm uses a standard …