Thermodynamics - Bidhannagar College
... In a cyclic process in which the system does net work on its surroundings, it is observed to be physically necessary not only that heat be taken into the system, but also, importantly, that some heat leave the system. The difference is the heat converted by the cycle into work. In each repetition o ...
... In a cyclic process in which the system does net work on its surroundings, it is observed to be physically necessary not only that heat be taken into the system, but also, importantly, that some heat leave the system. The difference is the heat converted by the cycle into work. In each repetition o ...
Heisenberg`s original derivation of the uncertainty principle and its
... the -ray thought experiment, but also gave its mathematical proof. However, he supposed the repeatability hypothesis or its approximate version as an additional assumption to the standard postulates for quantum mechanics. The approximate repeatability hypothesis (AR) has not been explicitly formula ...
... the -ray thought experiment, but also gave its mathematical proof. However, he supposed the repeatability hypothesis or its approximate version as an additional assumption to the standard postulates for quantum mechanics. The approximate repeatability hypothesis (AR) has not been explicitly formula ...
First-Person Plural Quantum Mechanics
... is a crude statement of instrumentalism and an insult to Bohr. To determine the import of Bohr’s reminder, one has to take account of its context [2, p. 17–18]: Now, what gives to the quantum-theoretical description its peculiar characteristic is just this, that in order to evade the quantum of acti ...
... is a crude statement of instrumentalism and an insult to Bohr. To determine the import of Bohr’s reminder, one has to take account of its context [2, p. 17–18]: Now, what gives to the quantum-theoretical description its peculiar characteristic is just this, that in order to evade the quantum of acti ...
Population inversion in quantum dot ensembles via adiabatic rapid passage
... inhomogeneity in practical realizations of ensembles of dots means that no resonant pulse can invert an entire ensemble exhibiting wide variation in energy and coupling strength. There is nevertheless a very good prospect for such inversion via adiabatic rapid passage 共ARP兲, which is known to be rob ...
... inhomogeneity in practical realizations of ensembles of dots means that no resonant pulse can invert an entire ensemble exhibiting wide variation in energy and coupling strength. There is nevertheless a very good prospect for such inversion via adiabatic rapid passage 共ARP兲, which is known to be rob ...
Iterative quantum-state transfer along a chain of nuclear spin qubits
... information without applying gate operations, but instead relying on a static coupling network 关2,3兴. The main difficulty with this approach is the required precision with which the couplings have to be realized in order to generate a transfer with high fidelity. This requirement can be relaxed sign ...
... information without applying gate operations, but instead relying on a static coupling network 关2,3兴. The main difficulty with this approach is the required precision with which the couplings have to be realized in order to generate a transfer with high fidelity. This requirement can be relaxed sign ...
Unscrambling the Quantum Omelette of Epistemic and Ontic
... According to Bohr [6]: “Physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods of ordering and surveying human experience. In this respect our task must be to account for such experience in a manner independent of individual subjectiv ...
... According to Bohr [6]: “Physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods of ordering and surveying human experience. In this respect our task must be to account for such experience in a manner independent of individual subjectiv ...
Distinguishing mixed quantum states: Minimum
... In contrast to unambiguous discrimination, the earliest measurement strategy for distinguishing nonorthogonal quantum states requires that a definite, i.e., conclusive outcome is to be returned in each single measurement. This means that errors in the conclusive result are unavoidable and the discri ...
... In contrast to unambiguous discrimination, the earliest measurement strategy for distinguishing nonorthogonal quantum states requires that a definite, i.e., conclusive outcome is to be returned in each single measurement. This means that errors in the conclusive result are unavoidable and the discri ...
Violation of Heisenberg’s Measurement-Disturbance Relationship by Weak Measurements
... one could correct this using feed-forward [31], but for simplicity we discard these events.) We characterize the teleportation by performing QST on the teleported single photon polarization. To do this we insert quarter- and halfwave plates, Q4 and H4, and remove the path qubit of photon 2. We find ...
... one could correct this using feed-forward [31], but for simplicity we discard these events.) We characterize the teleportation by performing QST on the teleported single photon polarization. To do this we insert quarter- and halfwave plates, Q4 and H4, and remove the path qubit of photon 2. We find ...
What classicality? Decoherence and Bohr`s classical concepts
... theory. Bohr explained that, in contrast with classical physics, quantum mechanics confronts us with the “impossibility of any sharp separation between the behavior of atomic objects and the interaction with the measuring instruments which serve to define the very conditions under which the phenomen ...
... theory. Bohr explained that, in contrast with classical physics, quantum mechanics confronts us with the “impossibility of any sharp separation between the behavior of atomic objects and the interaction with the measuring instruments which serve to define the very conditions under which the phenomen ...
Chapter 3
... to Whittaker's (1904) classic treatise on the subject, which had also been of crucial assistance to Dirac in his formulation of quantum mechanics. Also, having mentioned Courant and Hilbert (1924), one should add that Whittaker's treatise Modern Analysis, in the guise of Whittaker and Watson (1927), ...
... to Whittaker's (1904) classic treatise on the subject, which had also been of crucial assistance to Dirac in his formulation of quantum mechanics. Also, having mentioned Courant and Hilbert (1924), one should add that Whittaker's treatise Modern Analysis, in the guise of Whittaker and Watson (1927), ...
Attention, Intention, and Will in Quantum Physics
... central problem in understanding the nature of reality, and our role in it, has been the puzzling separation of nature into two seemingly very different parts, mind and matter. This had led to the divergent approaches of Idealism and Materialism. According to the precepts of Idealism our ideas, thou ...
... central problem in understanding the nature of reality, and our role in it, has been the puzzling separation of nature into two seemingly very different parts, mind and matter. This had led to the divergent approaches of Idealism and Materialism. According to the precepts of Idealism our ideas, thou ...
Correlated many-electron states in a quantum dot containing a
... The authors of Ref. 10 found the unexpected result that the exchange term ⌬Z was independent of the filling of the shell in a limited Hilbert space 共involving only the partially filled s, p, and d shells兲. If all configurations are included the ⌬Z slightly changed due to the presence of excitations. ...
... The authors of Ref. 10 found the unexpected result that the exchange term ⌬Z was independent of the filling of the shell in a limited Hilbert space 共involving only the partially filled s, p, and d shells兲. If all configurations are included the ⌬Z slightly changed due to the presence of excitations. ...
Quantum Programming Languages: Survey and Bibliography
... as the first model for general quantum computation, with the crucial property that superpositions of machine states are allowed, and defines a universal QTM. Earlier work by Benioff (1980) defines physical systems in which the laws of quantum mechanics would lead to the simulation of a classical Tur ...
... as the first model for general quantum computation, with the crucial property that superpositions of machine states are allowed, and defines a universal QTM. Earlier work by Benioff (1980) defines physical systems in which the laws of quantum mechanics would lead to the simulation of a classical Tur ...
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.