Rapid readout of a register of qubits using open loop... Joshua Combes , Aaron Denney , and Howard M. Wiseman
... In this section we derive the rate at which a continuous measurement extracts information from a quantum system for a reasonably general measurement model. The starting point for our analysis is the quantum trajectory description of the measurement process. The physics behind the quantum trajectory ...
... In this section we derive the rate at which a continuous measurement extracts information from a quantum system for a reasonably general measurement model. The starting point for our analysis is the quantum trajectory description of the measurement process. The physics behind the quantum trajectory ...
Quantum Mechanics - Nanyang Technological University
... superconducting circuits. Both the electromagnetic quantum vacuum and the phononic quantum vacuum can be studied. Three different experiments carried out at mK temperatures and at microwave frequencies are described. First, we use a Superconducting Quantum Interference Device at the end of a microwa ...
... superconducting circuits. Both the electromagnetic quantum vacuum and the phononic quantum vacuum can be studied. Three different experiments carried out at mK temperatures and at microwave frequencies are described. First, we use a Superconducting Quantum Interference Device at the end of a microwa ...
1 The quantum-classical boundary and the moments of inertia of
... nature of the quantum-classical transition. The robustness of classical behavior, both in the aspect that assembling a sufficiently large number of quantum objects together seems invariably to produce a classically behaved object, and for the robustness of classical states with respect to observatio ...
... nature of the quantum-classical transition. The robustness of classical behavior, both in the aspect that assembling a sufficiently large number of quantum objects together seems invariably to produce a classically behaved object, and for the robustness of classical states with respect to observatio ...
Chapter 6 Particle Spin and the Stern
... atomic spectra. What the experiment was intended to test was ‘space-quantization’ associated with the orbital angular momentum of atomic electrons. The prediction, already made by the ‘old’ quantum theory that developed out of Bohr’s work, was that the spatial components of angular momentum could on ...
... atomic spectra. What the experiment was intended to test was ‘space-quantization’ associated with the orbital angular momentum of atomic electrons. The prediction, already made by the ‘old’ quantum theory that developed out of Bohr’s work, was that the spatial components of angular momentum could on ...
Full text in PDF form
... In this paper, we also consider the issue of causality at the Planck scale in the framework of causal sets, although our results do not promote this aspect as decisively as in [12]. In our opinion, the very concept of causality makes sense in the quasi-classical limit, in relation with the fact that ...
... In this paper, we also consider the issue of causality at the Planck scale in the framework of causal sets, although our results do not promote this aspect as decisively as in [12]. In our opinion, the very concept of causality makes sense in the quasi-classical limit, in relation with the fact that ...
Quantum Entanglement in Many-body Systems
... The definition of entanglement formation, like many other definitions that quantify entanglement, usually requires numerical minimizations and is thus not very useful in particular for many-body systems. However, for systems consisting of a pair of qubits (i.e. two level systems), Wootters (see [10] ...
... The definition of entanglement formation, like many other definitions that quantify entanglement, usually requires numerical minimizations and is thus not very useful in particular for many-body systems. However, for systems consisting of a pair of qubits (i.e. two level systems), Wootters (see [10] ...
Arbitrarily Small Amount of Measurement Independence Is Sufficient
... inequalities of Table I form a complete set for all h ∈ 14 ; 13 ½ [23]. A visual representation of the evolution of the MDLpolytope as h goes from 14 to 13 can be seen in Fig. 3. It is interesting to note that the well-known CHSH inequality is not among these pffiffiffi 7 families. From (11), we see that ...
... inequalities of Table I form a complete set for all h ∈ 14 ; 13 ½ [23]. A visual representation of the evolution of the MDLpolytope as h goes from 14 to 13 can be seen in Fig. 3. It is interesting to note that the well-known CHSH inequality is not among these pffiffiffi 7 families. From (11), we see that ...
Quantum interference with molecules: The role of
... whether or not it exhibits interference fringes. It is straightforward to extend our model to the case in which the potential has more than two peaks, in particular to the experimentally relevant situation in which it represents a diffraction grating, and the interference pattern resulting from the ...
... whether or not it exhibits interference fringes. It is straightforward to extend our model to the case in which the potential has more than two peaks, in particular to the experimentally relevant situation in which it represents a diffraction grating, and the interference pattern resulting from the ...
Quantum coding with finite resources
... it is natural to ask how well quantum coding schemes perform when we restrict the size of the quantum devices used for encoding the channel inputs and decoding its outputs. This is equivalent to considering communication with only a fixed number of channel uses. In this work, following the footsteps ...
... it is natural to ask how well quantum coding schemes perform when we restrict the size of the quantum devices used for encoding the channel inputs and decoding its outputs. This is equivalent to considering communication with only a fixed number of channel uses. In this work, following the footsteps ...
Introduction to Quantum Information
... presentation of its troubled history may be found in (Mcgrayne 2011). The picture is completed by identifying, or formulating the quantity of information. It was Claude Shannon (1916–2001) who solved this problem and, by using it to devise his two coding theorems, founded information theory (Shannon ...
... presentation of its troubled history may be found in (Mcgrayne 2011). The picture is completed by identifying, or formulating the quantity of information. It was Claude Shannon (1916–2001) who solved this problem and, by using it to devise his two coding theorems, founded information theory (Shannon ...
The symmetrized quantum potential and space as a direct
... by means of the changes of things”. The idea of a timeless universe was then discussed by Einstein and Gödel at the beginning of the ’50 of the last century. Gödel and Einstein opened new perspectives regarding definition and experience of time. They have been discussing the possibility that there i ...
... by means of the changes of things”. The idea of a timeless universe was then discussed by Einstein and Gödel at the beginning of the ’50 of the last century. Gödel and Einstein opened new perspectives regarding definition and experience of time. They have been discussing the possibility that there i ...
Quantum Probabilistic Dyadic Second-Order Logic⋆
... product and adjoint of linear maps which induce the actions6 . We will use the same symbols for operations on actions as those for linear maps. In this paper, a property of a quantum system with state space H is just a subset of ΣH . However, according to quantum theory, not any subset of ΣH represe ...
... product and adjoint of linear maps which induce the actions6 . We will use the same symbols for operations on actions as those for linear maps. In this paper, a property of a quantum system with state space H is just a subset of ΣH . However, according to quantum theory, not any subset of ΣH represe ...
Quantum computing and mathematical research
... How to control the (initial) quantum states? How to create the appropriate environment for the quantum mechanical system to evolve without observing? How to “fight” decoherence (the interaction of the system and the external environment)? How to use the phenomena of superposition and entanglement ef ...
... How to control the (initial) quantum states? How to create the appropriate environment for the quantum mechanical system to evolve without observing? How to “fight” decoherence (the interaction of the system and the external environment)? How to use the phenomena of superposition and entanglement ef ...