One Complexity Theorist`s View of Quantum Computing
... The complexity of quantum computation remains poorly understood. While physicists attempt to find ways to create quantum computers, we still do not have much evidence one way or the other as to how useful these machines will be. The tools of computational complexity theory should come to bear on the ...
... The complexity of quantum computation remains poorly understood. While physicists attempt to find ways to create quantum computers, we still do not have much evidence one way or the other as to how useful these machines will be. The tools of computational complexity theory should come to bear on the ...
Quantum Noise and Quantum Operations
... • How come we don’t see superpositions in the world we observe? • The book blames: the extreme sensitivity of macroscopic superposition to decoherence • i.e it is impossible in practice to isolate the cat and the atom in their box – Unintentional measurements are made • Heat leaks from the box • The ...
... • How come we don’t see superpositions in the world we observe? • The book blames: the extreme sensitivity of macroscopic superposition to decoherence • i.e it is impossible in practice to isolate the cat and the atom in their box – Unintentional measurements are made • Heat leaks from the box • The ...
Certainty and Uncertainty in Quantum Information Processing
... universe”. Popular accounts of quantum mechanics, and some scholarly articles, give the impression that quantum mechanics, at least in the many worlds interpretation, implies that everything happens in some universe. A typical quote (Deutsch 1998): “There are even universes in which a given object ...
... universe”. Popular accounts of quantum mechanics, and some scholarly articles, give the impression that quantum mechanics, at least in the many worlds interpretation, implies that everything happens in some universe. A typical quote (Deutsch 1998): “There are even universes in which a given object ...
Universally valid reformulation of the Heisenberg uncertainty
... interaction is said to be of independent intervention for the pair (A,B) if the noise and the disturbance are independent of the object system; or precisely if there is observables N and D of probe P such that N(A)⫽1 丢 N and D(B)⫽1 丢 D. In this case, we have 关 N(A),B in 兴 ⫽ 关 A in ,D(B) 兴 ⫽0. Theref ...
... interaction is said to be of independent intervention for the pair (A,B) if the noise and the disturbance are independent of the object system; or precisely if there is observables N and D of probe P such that N(A)⫽1 丢 N and D(B)⫽1 丢 D. In this case, we have 关 N(A),B in 兴 ⫽ 关 A in ,D(B) 兴 ⫽0. Theref ...
Strongly correlated phenomena in cavity QED
... • We have shown QCMA is contained in UQMA. Could they be the same? • Using the contruction of (Aaronson and Kuperberg 06) we can find an quantum oracle for which they are not.... • In Hamiltonian complexity terms: • Can we find for every poly-gapped local Hamiltonian H another local Hamiltonian H’ w ...
... • We have shown QCMA is contained in UQMA. Could they be the same? • Using the contruction of (Aaronson and Kuperberg 06) we can find an quantum oracle for which they are not.... • In Hamiltonian complexity terms: • Can we find for every poly-gapped local Hamiltonian H another local Hamiltonian H’ w ...
... therefore come as a surprise to learn that quantum mechanical calculations are now routinely carried out to predict accurately the physical and chemical properties of systems containing many hundreds of atoms. These calculations can predict properties such as bond-lengths, phonon frequencies, elasti ...
Chapter 1. The Basics of Quantum Mechanics
... Cs, respectively, in this so-called Rydberg formula, one finds decent agreement between the n-dependence of the energy spacings of the singly excited valence states of these atoms. The fact that is larger for Na than for Li and largest for Cs reflects that fact that the 3s orbital of Na penetrates ...
... Cs, respectively, in this so-called Rydberg formula, one finds decent agreement between the n-dependence of the energy spacings of the singly excited valence states of these atoms. The fact that is larger for Na than for Li and largest for Cs reflects that fact that the 3s orbital of Na penetrates ...
Single_QD_spectro
... including narrow peaks and a longitudinal optical (LO) phonon progression with peak spacing comparable to the bulk LO phonon frequency. Differences in phonon coupling are observed between different nanocrystals with an average value that is equal to the phonon coupling measured in ensemble samples. ...
... including narrow peaks and a longitudinal optical (LO) phonon progression with peak spacing comparable to the bulk LO phonon frequency. Differences in phonon coupling are observed between different nanocrystals with an average value that is equal to the phonon coupling measured in ensemble samples. ...
A Brief Review on Quantum Bit Commitment
... a no-go theorem showing that unconditionally secure QBC is impossible unless relativistic effects are used. This impossibility comes from the fact that a cheating strategy using EPR pairs can always be implemented. Thus, different approaches have been presented in order to avoid the no-go theorem [1 ...
... a no-go theorem showing that unconditionally secure QBC is impossible unless relativistic effects are used. This impossibility comes from the fact that a cheating strategy using EPR pairs can always be implemented. Thus, different approaches have been presented in order to avoid the no-go theorem [1 ...
Limitations on quantum dimensionality reduction
... accepts with probability 12 þ 12 jh jij 2 . As the inner products are approximately preserved by the map into R OðnÞ , the referee can distinguish between the two cases of the states he receives being equal or distinct, with constant probability. More generally, Alice and Bob can use a similar SMP ...
... accepts with probability 12 þ 12 jh jij 2 . As the inner products are approximately preserved by the map into R OðnÞ , the referee can distinguish between the two cases of the states he receives being equal or distinct, with constant probability. More generally, Alice and Bob can use a similar SMP ...
- Philsci
... designed to ensure that locations can be ascribed to medium-sized lumps of matter, it seems to be a precondition of the program that experiences supervene on the locations of many-particle subsystems of the brain.3 A version of the fuzzy link will apply to these brain states; you have a particular ...
... designed to ensure that locations can be ascribed to medium-sized lumps of matter, it seems to be a precondition of the program that experiences supervene on the locations of many-particle subsystems of the brain.3 A version of the fuzzy link will apply to these brain states; you have a particular ...
Document
... Fundamental noise in interference experiments Amplitude of interference fringes is a quantum operator. The measured value of the amplitude will fluctuate from shot to shot. We want to characterize not only the average but the fluctuations as well. ...
... Fundamental noise in interference experiments Amplitude of interference fringes is a quantum operator. The measured value of the amplitude will fluctuate from shot to shot. We want to characterize not only the average but the fluctuations as well. ...
A 2D Quantum Walk Simulation of Two
... We present a highly scalable implementation of an optical quantum walk on two spatial dimensions for quantum simulation, using frugal physical resources. One major advance of a two-dimensional system is the possibility to simulate a discrete evolution of two-particles including controlled interactio ...
... We present a highly scalable implementation of an optical quantum walk on two spatial dimensions for quantum simulation, using frugal physical resources. One major advance of a two-dimensional system is the possibility to simulate a discrete evolution of two-particles including controlled interactio ...
High-Performance Computing and Quantum Processing - HPC-UA
... sustained by any envisioned super-computer platforms due to fundamental and technological limits. Advanced digital integrated circuits (ICs) are used to implement various distinct computers designs, organizations and architectures. Enormous progress was achieved in semiconductor devices and ICs. The ...
... sustained by any envisioned super-computer platforms due to fundamental and technological limits. Advanced digital integrated circuits (ICs) are used to implement various distinct computers designs, organizations and architectures. Enormous progress was achieved in semiconductor devices and ICs. The ...
Physlet Quantum Physics - Boston University Physics
... By now it is hard to imagine an instructor who has not heard the call to “teach with technology,” as it has resounded through educational institutions and government agencies alike over the past several years. It is, however, easier to imagine an instructor of modern physics and quantum mechanics wh ...
... By now it is hard to imagine an instructor who has not heard the call to “teach with technology,” as it has resounded through educational institutions and government agencies alike over the past several years. It is, however, easier to imagine an instructor of modern physics and quantum mechanics wh ...