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I (x) - Boston University Physics Department.
... 2. Direct simulator (solver) for interacting problems. Quantum impurity in a 1D system of interacting fermions (an example). ...
... 2. Direct simulator (solver) for interacting problems. Quantum impurity in a 1D system of interacting fermions (an example). ...
Partial fulfillment of DiVincenzo criteria using manipulation of Rb
... opposing states are usually represented by a change in an electrical voltage. However, unlike their classical counterpart, single qubits have a range of valid information states where they can simultaneously occupy both computational states. There is an infinite number of superposition states availa ...
... opposing states are usually represented by a change in an electrical voltage. However, unlike their classical counterpart, single qubits have a range of valid information states where they can simultaneously occupy both computational states. There is an infinite number of superposition states availa ...
Document
... • What is a quantum processor, and why must it produce (and why must we detect) highly-entangled qubit states? • What is quantum entanglement? • How to detect it? the complete way: quantum state tomography the scalable way: entanglement witnesses • One specific example: production and detection of t ...
... • What is a quantum processor, and why must it produce (and why must we detect) highly-entangled qubit states? • What is quantum entanglement? • How to detect it? the complete way: quantum state tomography the scalable way: entanglement witnesses • One specific example: production and detection of t ...
Coupling Quantum Tunneling with Cavity Photons
... mix to give symmetric and antisymmetric electron wave functions (red in Fig. 1A), which, together with the low-energy hole states (blue) in p theffiffi left QW, produce the exciton modes ð1= 2ÞfjIX 〉 T jDX 〉g, split by the tunneling energy ħJ (where ħ is Planck’s constant divided by 2p). These modes ...
... mix to give symmetric and antisymmetric electron wave functions (red in Fig. 1A), which, together with the low-energy hole states (blue) in p theffiffi left QW, produce the exciton modes ð1= 2ÞfjIX 〉 T jDX 〉g, split by the tunneling energy ħJ (where ħ is Planck’s constant divided by 2p). These modes ...
Why Quantum Computing? - Quantum Physics and Quantum
... or f 1with probability ½. These are classically mutually exclusive. * Quantum mechanically these two alternatives can INTERFERE to yield some global property of the function f and by using a Hadamard gate can recombine the different alternatives ...
... or f 1with probability ½. These are classically mutually exclusive. * Quantum mechanically these two alternatives can INTERFERE to yield some global property of the function f and by using a Hadamard gate can recombine the different alternatives ...
Quantum Algorithms - UCSB Computer Science
... (α 0 β 1 ) You α 0 You saw a " zero" β 1 You saw a " one" ...
... (α 0 β 1 ) You α 0 You saw a " zero" β 1 You saw a " one" ...
Defining and Measuring Multi-partite Entanglement
... it is possible to achieve at least the same as with m partitions. This can be seen by taking two of the m partitions and considering them as a single partition. This procedure may be useful in determining suitable states for many party quantum communication, which may use more than just bipartite en ...
... it is possible to achieve at least the same as with m partitions. This can be seen by taking two of the m partitions and considering them as a single partition. This procedure may be useful in determining suitable states for many party quantum communication, which may use more than just bipartite en ...
A Classical-Light Attack on Energy-Time Entangled Quantum Key Distribution, and Countermeasures
... QKD uses polarization of individual photons, but the development of energytime entanglement could lead to QKD protocols robust against environmental effects. The security proofs of energy-time entangled QKD rely on a violation of the Bell inequality to certify the system as secure. This thesis shows ...
... QKD uses polarization of individual photons, but the development of energytime entanglement could lead to QKD protocols robust against environmental effects. The security proofs of energy-time entangled QKD rely on a violation of the Bell inequality to certify the system as secure. This thesis shows ...
Single photons from single ions: quantum interference and distant ion interaction Dissertation
... In analogy to the classical computer, the quantum computer uses gates to process quantum information. There is a finite set of quantum gates that are called universal, such that an arbitrary quantum computation on any number of qubits can be generated [4]. Single qubit gates (e.g. NOT gate, Hadamard ...
... In analogy to the classical computer, the quantum computer uses gates to process quantum information. There is a finite set of quantum gates that are called universal, such that an arbitrary quantum computation on any number of qubits can be generated [4]. Single qubit gates (e.g. NOT gate, Hadamard ...
Interaction-based nonlinear quantum metrology with a cold atomic ensemble
... observables like velocity, angular momentum, energy, etc., and Hermitian operators. The results of a measurement process are tied to the spectrum of its corresponding operator. A real process, e.g., the detection of photons by a photodetector with some level of electronic noise and dark counts, has ...
... observables like velocity, angular momentum, energy, etc., and Hermitian operators. The results of a measurement process are tied to the spectrum of its corresponding operator. A real process, e.g., the detection of photons by a photodetector with some level of electronic noise and dark counts, has ...
Computational Power of the Quantum Turing Automata
... Somewhat later it turned out that they were very much the same. But later still, towards the end of the 20th century, it turned out that certain physical assumptions, which may not necessarily correspond to how certain computations can be done, were smuggled into all three models. In particular quan ...
... Somewhat later it turned out that they were very much the same. But later still, towards the end of the 20th century, it turned out that certain physical assumptions, which may not necessarily correspond to how certain computations can be done, were smuggled into all three models. In particular quan ...
Quantum Computer Compilers
... and we have two measurement operators: M0 which projects the state onto the |0 basis and M1 which projects the state onto the |1 basis. The probability that the result 0 occurs is ...
... and we have two measurement operators: M0 which projects the state onto the |0 basis and M1 which projects the state onto the |1 basis. The probability that the result 0 occurs is ...
Atomic and nuclear physics
... the quantum energy of the photon matches precisely the energy gap between the initial and final states. As the energies E1 and E2 of the participating pair of quantum energy states of an atom can only assume discrete values, the photons are only emitted and absorbed at discrete frequencies. The tota ...
... the quantum energy of the photon matches precisely the energy gap between the initial and final states. As the energies E1 and E2 of the participating pair of quantum energy states of an atom can only assume discrete values, the photons are only emitted and absorbed at discrete frequencies. The tota ...
CSE 599d - Quantum Computing Mixed Quantum States and Open
... Notice also that we have moved into a new realm here. Now, no longer are we dealing with single isolated quantum system, but we are obtaining tools for talking about quantum subsystems which interact with other quantum subsystems but we only have access to one of the subsystems (or are only interest ...
... Notice also that we have moved into a new realm here. Now, no longer are we dealing with single isolated quantum system, but we are obtaining tools for talking about quantum subsystems which interact with other quantum subsystems but we only have access to one of the subsystems (or are only interest ...
Synthesising arbitrary quantum states in a
... of such superposed states, and their subsequent use, is the basis for quantum computation and simulation1 . Creating these complex superpositions in harmonic systems, such as the motional state of trapped ions2 , microwave resonators3–5 or optical cavities6 , has presented a significant challenge, b ...
... of such superposed states, and their subsequent use, is the basis for quantum computation and simulation1 . Creating these complex superpositions in harmonic systems, such as the motional state of trapped ions2 , microwave resonators3–5 or optical cavities6 , has presented a significant challenge, b ...
Quantum Theory: a Pragmatist Approach
... states convey knowledge or information concerning a system or ensemble without describing its physical condition. I shall elaborate a version of this view that assigns a two-fold role to the quantum state. It plays its primary role in the algorithm provided by the Born Rule for generating quantum p ...
... states convey knowledge or information concerning a system or ensemble without describing its physical condition. I shall elaborate a version of this view that assigns a two-fold role to the quantum state. It plays its primary role in the algorithm provided by the Born Rule for generating quantum p ...
Nilpotence - Nature`s Code Foundation
... field in both its Lorentz and Einstein General Relativistic invariant forms [2]. R&D’s work thus provides a counterexample to the widely held established view that Einstein’s General Relativity (expressed now in the form of a multivariate 4 vector group representation) is incompatible with quantum m ...
... field in both its Lorentz and Einstein General Relativistic invariant forms [2]. R&D’s work thus provides a counterexample to the widely held established view that Einstein’s General Relativity (expressed now in the form of a multivariate 4 vector group representation) is incompatible with quantum m ...
The quantum world is not built up from correlations - Philsci
... the global state of a composite quantum system can be completely determined by specifying correlations (joint probability distributions) when sufficient local measurements are performed on each subsystem. It thus suffices to consider only correlations when completely specifying the state of the comp ...
... the global state of a composite quantum system can be completely determined by specifying correlations (joint probability distributions) when sufficient local measurements are performed on each subsystem. It thus suffices to consider only correlations when completely specifying the state of the comp ...