Quantum Money from Hidden Subspaces
... both in the ideas that have been used to construct public-key quantum money schemes, and in the ideas that have been used to break them. Of course, this record also underscores the need for caution! To whatever extent we can, we ought to hold quantum money schemes to modern cryptographic standards, ...
... both in the ideas that have been used to construct public-key quantum money schemes, and in the ideas that have been used to break them. Of course, this record also underscores the need for caution! To whatever extent we can, we ought to hold quantum money schemes to modern cryptographic standards, ...
Full-Text PDF
... In Chapter 16 of their book [9], Walls and Milburn discussed in detail the role of this formula in the theory of quantum information. Earlier, this formula played the pivotal role for Yuen to formulate his two-photon coherent states or two-mode squeezed states [10]. The same formula was used by Yurk ...
... In Chapter 16 of their book [9], Walls and Milburn discussed in detail the role of this formula in the theory of quantum information. Earlier, this formula played the pivotal role for Yuen to formulate his two-photon coherent states or two-mode squeezed states [10]. The same formula was used by Yurk ...
Physical Limits of Computing
... Anyway, regardless of our state of knowledge, note that the sum of the system's entropy and its known information is always conserved. Known information and entropy are just two forms of the same fundamental quantity, somewhat analogously to kinetic and potential energy. Whether a system contains kn ...
... Anyway, regardless of our state of knowledge, note that the sum of the system's entropy and its known information is always conserved. Known information and entropy are just two forms of the same fundamental quantity, somewhat analogously to kinetic and potential energy. Whether a system contains kn ...
Quantum fluctuation relations: Foundations and applications
... Two ingredients are at the heart of fluctuation relations. The first one concerns the initial condition of the system under study. This is supposed to be in thermal equilibrium described by a canonical distribution of the form of Eq. (2). It hence is of statistical nature. Its use and properties are ...
... Two ingredients are at the heart of fluctuation relations. The first one concerns the initial condition of the system under study. This is supposed to be in thermal equilibrium described by a canonical distribution of the form of Eq. (2). It hence is of statistical nature. Its use and properties are ...
Quantum Algorithms for Estimating Gauss Sums and Calculating
... P of the Gauss sum estimation algorithm is the preparation of a quantum state x χ(x)|xi that is defined by the values of the multiplicative character χ. With the use of this state it also possible to efficiently solve the discrete logarithm problem over R, as explained in Section 4. The preparation ...
... P of the Gauss sum estimation algorithm is the preparation of a quantum state x χ(x)|xi that is defined by the values of the multiplicative character χ. With the use of this state it also possible to efficiently solve the discrete logarithm problem over R, as explained in Section 4. The preparation ...
The Parallel Development of Matrix and Wave Mechanics
... comes into play, is forgotten. Because where lies the origin of this complicated theory everybody so eagerly applies? Exactly these origins of quantum mechanics will be the subject of the present paper, and it will appear that this subject is extremely interesting, and maybe even exciting to study. ...
... comes into play, is forgotten. Because where lies the origin of this complicated theory everybody so eagerly applies? Exactly these origins of quantum mechanics will be the subject of the present paper, and it will appear that this subject is extremely interesting, and maybe even exciting to study. ...
Quasiclassical Coarse Graining and Thermodynamic Entropy∗
... of a closed system — a formulation based on histories — the situation is different. The probability that either of two exclusive histories will occur has to be equal to the sum of the individual probabilities. This will be impossible in quantum mechanics unless the interference term between the the ...
... of a closed system — a formulation based on histories — the situation is different. The probability that either of two exclusive histories will occur has to be equal to the sum of the individual probabilities. This will be impossible in quantum mechanics unless the interference term between the the ...
abstracts - Istituto Nazionale di Fisica Nucleare
... momentum space for fermions; the elementary constituents of matter, and most of the equations, defined ad hoc in elementary particle theoretical physics, are then naturally obtained. In particular the so called internal symmetry groups transparently originate from the 3 complex division algebras: co ...
... momentum space for fermions; the elementary constituents of matter, and most of the equations, defined ad hoc in elementary particle theoretical physics, are then naturally obtained. In particular the so called internal symmetry groups transparently originate from the 3 complex division algebras: co ...
achieving 128-bit security against quantum attacks in openvpn
... A number of defenses against quantum computer attacks are known. A possible solution is to use quantum key distribution, which uses quantum communication to exchange a key between two parties and can be mathematically proven secure assuming some physical laws hold. A significant disadvantage of this ...
... A number of defenses against quantum computer attacks are known. A possible solution is to use quantum key distribution, which uses quantum communication to exchange a key between two parties and can be mathematically proven secure assuming some physical laws hold. A significant disadvantage of this ...
achieving 128-bit security against quantum attacks in openvpn
... A number of defenses against quantum computer attacks are known. A possible solution is to use quantum key distribution, which uses quantum communication to exchange a key between two parties and can be mathematically proven secure assuming some physical laws hold. A significant disadvantage of this ...
... A number of defenses against quantum computer attacks are known. A possible solution is to use quantum key distribution, which uses quantum communication to exchange a key between two parties and can be mathematically proven secure assuming some physical laws hold. A significant disadvantage of this ...
Prime Factorization by Quantum Adiabatic Computation
... is that quantum computers use quantum bits, qubits, instead of classical bits. Whereas a classical bit can only be in one state at a time, a qubit can be in a superposition of several states. This is what allows quantum parallelism where several computations can be performed in parallel until the fi ...
... is that quantum computers use quantum bits, qubits, instead of classical bits. Whereas a classical bit can only be in one state at a time, a qubit can be in a superposition of several states. This is what allows quantum parallelism where several computations can be performed in parallel until the fi ...
Terahertz quantum cascade lasers operating up to ∼ 200 K with
... plings and several scattering mechanisms. The tunneling coupling strengths between the four states are calculated using a tight-binding approach. The temperature, at which the gain coefficient of gisb ! 35 cm−1 was maintained, was targeted to be maximized, without constraining the threshold current ...
... plings and several scattering mechanisms. The tunneling coupling strengths between the four states are calculated using a tight-binding approach. The temperature, at which the gain coefficient of gisb ! 35 cm−1 was maintained, was targeted to be maximized, without constraining the threshold current ...
Quantum teleportation
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location. Because it depends on classical communication, which can proceed no faster than the speed of light, it cannot be used for faster-than-light transport or communication of classical bits. It also cannot be used to make copies of a system, as this violates the no-cloning theorem. While it has proven possible to teleport one or more qubits of information between two (entangled) atoms, this has not yet been achieved between molecules or anything larger.Although the name is inspired by the teleportation commonly used in fiction, there is no relationship outside the name, because quantum teleportation concerns only the transfer of information. Quantum teleportation is not a form of transportation, but of communication; it provides a way of transporting a qubit from one location to another, without having to move a physical particle along with it.The seminal paper first expounding the idea was published by C. H. Bennett, G. Brassard, C. Crépeau, R. Jozsa, A. Peres and W. K. Wootters in 1993. Since then, quantum teleportation was first realized with single photons and later demonstrated with various material systems such as atoms, ions, electrons and superconducting circuits. The record distance for quantum teleportation is 143 km (89 mi).