Development of a Silicon Semiconductor Quantum Dot Qubit with
... Semiconductor quantum dots in silicon demonstrate exceptionally long spin lifetimes as qubits and are therefore promising candidates for quantum information processing. However, control and readout techniques for these devices have thus far employed low frequency electrons, in contrast to high speed ...
... Semiconductor quantum dots in silicon demonstrate exceptionally long spin lifetimes as qubits and are therefore promising candidates for quantum information processing. However, control and readout techniques for these devices have thus far employed low frequency electrons, in contrast to high speed ...
PowerPoint 演示文稿 - at www.arxiv.org.
... In last several decades, the developments in advanced scientific instruments have brought great convenience to condensed matter physics. One paradigm is probing the electronic states and electronic structures of strongly correlated electron systems. Remarkably in high-Tc superconductors, tools such ...
... In last several decades, the developments in advanced scientific instruments have brought great convenience to condensed matter physics. One paradigm is probing the electronic states and electronic structures of strongly correlated electron systems. Remarkably in high-Tc superconductors, tools such ...
Studies in plausibility theory, with applications to physics
... for me just a difficult and obscure subject. Suddenly it was shown by Jaynes to be just a 1 To ...
... for me just a difficult and obscure subject. Suddenly it was shown by Jaynes to be just a 1 To ...
imaging single-electron charging in nanostructures by low
... Science is a collaborative and social endeavor, and it is my pleasure to acknowledge other people’s contributions to this work. There is a large number of colleagues, collaborators, and friends that I had a chance to interact and work with, and it seems impossible to credit them all. Many of the peo ...
... Science is a collaborative and social endeavor, and it is my pleasure to acknowledge other people’s contributions to this work. There is a large number of colleagues, collaborators, and friends that I had a chance to interact and work with, and it seems impossible to credit them all. Many of the peo ...
Quantum Measurement and Control
... The system state, as we have defined it, represents an observer’s knowledge about the system variables. Unless the probability distribution is non-zero only for a single configuration, we say that it represents a state of uncertainty or incomplete knowledge. That is, in this book we adopt the positi ...
... The system state, as we have defined it, represents an observer’s knowledge about the system variables. Unless the probability distribution is non-zero only for a single configuration, we say that it represents a state of uncertainty or incomplete knowledge. That is, in this book we adopt the positi ...
Numerical simulation of information recovery in quantum computers.
... for all the ways a single gate may produce two bit-flip errors in the cat-state, the first and fourth qubit have different values. Using two CNOT gates with a fifth qubit as a target and by measuring it, we are able to detect these errors. The ancilla state is rejected if the result of the measureme ...
... for all the ways a single gate may produce two bit-flip errors in the cat-state, the first and fourth qubit have different values. Using two CNOT gates with a fifth qubit as a target and by measuring it, we are able to detect these errors. The ancilla state is rejected if the result of the measureme ...
Theory and applications of light-matter interactions in Gerasimos Angelatos
... semiconductor transistor to control electronic signals. For instance, quantum cryptography allows for completely secure communication guaranteed by the laws of quantum mechanics. The quintessential quantum cryptography scheme is the BB84 protocol, where quantum bits are encoded in the polarization o ...
... semiconductor transistor to control electronic signals. For instance, quantum cryptography allows for completely secure communication guaranteed by the laws of quantum mechanics. The quintessential quantum cryptography scheme is the BB84 protocol, where quantum bits are encoded in the polarization o ...
POLITesi - Politecnico di Milano
... In this PhD thesis we studied, designed, realized and tested custom instrumentation for cryogenic measurement, in particular measurement on quantum dot for quantum computing. This kind of investigation has huge application on cryptography, advanced physical simulation and single electron devices. In ...
... In this PhD thesis we studied, designed, realized and tested custom instrumentation for cryogenic measurement, in particular measurement on quantum dot for quantum computing. This kind of investigation has huge application on cryptography, advanced physical simulation and single electron devices. In ...
QUANTUM COMPUTING
... Moreover, theoretical results obtained so far provide evidence that quantum computation represents the rst real challenge to the modern, eciency oriented, version of the Church-Turing thesis: Any reasonable model of computation can be eciently simulated by probabilistic Turing machines. Quantum c ...
... Moreover, theoretical results obtained so far provide evidence that quantum computation represents the rst real challenge to the modern, eciency oriented, version of the Church-Turing thesis: Any reasonable model of computation can be eciently simulated by probabilistic Turing machines. Quantum c ...
Flat spin-wave dispersion in a triangular antiferromagnet Oleg A. Starykh,
... The authors of Ref. 13 conjectured that the qualitative changes between the actual dispersion for S = 1 / 2 and the classical dispersion may imply that, at energies comparable to the exchange integral J, the system is better described in terms of pairs of deconfined spinons rather than magnons 共the ...
... The authors of Ref. 13 conjectured that the qualitative changes between the actual dispersion for S = 1 / 2 and the classical dispersion may imply that, at energies comparable to the exchange integral J, the system is better described in terms of pairs of deconfined spinons rather than magnons 共the ...
Correlations in multipartite systems: From entanglement to localization Julia Stasi ´nska
... data, the only requirement is that the shared correlations are sufficiently strong to enable a given task. The strength of classical correlations is subject to certain constraints, commonly known as Bell inequalities. Violation of these inequalities is the manifestation of non-locality—displayed, in ...
... data, the only requirement is that the shared correlations are sufficiently strong to enable a given task. The strength of classical correlations is subject to certain constraints, commonly known as Bell inequalities. Violation of these inequalities is the manifestation of non-locality—displayed, in ...
Charged domain walls as quantum strings on a - Instituut
... displaced by a lattice constant, the potential energy is at a minimum. This model is well understood.24 When the strength of the nonlinear interaction exceeds a critical value (g.g c ), the interaction term is relevant and the string localizes. The excitation spectrum develops a gap and it is charac ...
... displaced by a lattice constant, the potential energy is at a minimum. This model is well understood.24 When the strength of the nonlinear interaction exceeds a critical value (g.g c ), the interaction term is relevant and the string localizes. The excitation spectrum develops a gap and it is charac ...
Towards a microscopic Description of classical Solutions in Field
... corresponding cross-section is proportional to the occupation number. As a next step, we develop the coherent state technique which can be used to represent generic classical fields as bound states. Using this method, we show how we can treat solitons in a microscopic description. In particular, we ...
... corresponding cross-section is proportional to the occupation number. As a next step, we develop the coherent state technique which can be used to represent generic classical fields as bound states. Using this method, we show how we can treat solitons in a microscopic description. In particular, we ...
Quantum Mechanics for Pedestrians 1: Fundamentals
... Before attending the quantum mechanics course, the students have had among others an introduction to atomic physics: relevant phenomena, experiments and simple calculations should therefore be familiar to them. Nevertheless, experience has shown that at the start of the lectures, some students do no ...
... Before attending the quantum mechanics course, the students have had among others an introduction to atomic physics: relevant phenomena, experiments and simple calculations should therefore be familiar to them. Nevertheless, experience has shown that at the start of the lectures, some students do no ...
PDF only
... data qubits corresponding to the white, and measure qubits to the black squares (see Fig. 1) – and using these ancilla measure qubits to repetitively perform parity measurements to detect bit-flip (X̂) and phase-flip (Ẑ) errors7 . A square chequerboard with (4n + 1)2 qubits is n-th order fault tole ...
... data qubits corresponding to the white, and measure qubits to the black squares (see Fig. 1) – and using these ancilla measure qubits to repetitively perform parity measurements to detect bit-flip (X̂) and phase-flip (Ẑ) errors7 . A square chequerboard with (4n + 1)2 qubits is n-th order fault tole ...
Adiabatic Circuits and Reversible Computing - UF CISE
... does not suffer from one of the abovementioned deficiencies or other. Of course, there is never any real solid argument showing why repairing a given one of these deficiencies must necessarily always lead to dissipation, only conjecture. And of course, each time a new model of reversible computing i ...
... does not suffer from one of the abovementioned deficiencies or other. Of course, there is never any real solid argument showing why repairing a given one of these deficiencies must necessarily always lead to dissipation, only conjecture. And of course, each time a new model of reversible computing i ...
Quantum computing
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.