Direct characterization of quantum dynamics
... by performing quantum state tomography in the joint Hilbert space of system and ancilla. The AAPT scheme has also been demonstrated experimentally 关15,17兴. The total number of experimental configurations required for measuring the quantum dynamics of n d-level quantum systems 共qudits兲 is d4n for bot ...
... by performing quantum state tomography in the joint Hilbert space of system and ancilla. The AAPT scheme has also been demonstrated experimentally 关15,17兴. The total number of experimental configurations required for measuring the quantum dynamics of n d-level quantum systems 共qudits兲 is d4n for bot ...
Quantum effects in classical systems having complex energy
... a classical particle the energy spectrum is discrete. While classical mechanics consists of nothing more than solving a differential equation to find the exact trajectory of a particle, quantum mechanics is an abstract theory in which the physical state of the system is represented by a vector in a ...
... a classical particle the energy spectrum is discrete. While classical mechanics consists of nothing more than solving a differential equation to find the exact trajectory of a particle, quantum mechanics is an abstract theory in which the physical state of the system is represented by a vector in a ...
Topic 13: Quantum and nuclear physics
... Back in the very early 1900s physicists thought that within a few years everything having to do with physics would be discovered and the “book of physics” would be complete. This “book of physics” has come to be known as classical physics and consists of particles and mechanics on the one hand, an ...
... Back in the very early 1900s physicists thought that within a few years everything having to do with physics would be discovered and the “book of physics” would be complete. This “book of physics” has come to be known as classical physics and consists of particles and mechanics on the one hand, an ...
Long Term Confidentiality: a Survey
... against quantum adversaries, offer no long term guarantees of confidentiality, as they are still based in the computational model of security. The effect of quantum computers on the security of symmetric key ciphers (e.g. due to Grover’s algorithm [51]) is considerably less severe, and may be compen ...
... against quantum adversaries, offer no long term guarantees of confidentiality, as they are still based in the computational model of security. The effect of quantum computers on the security of symmetric key ciphers (e.g. due to Grover’s algorithm [51]) is considerably less severe, and may be compen ...
The role of Chern Simons theory in solving the fractional quantum
... fermions carrying two vortices. • It clarifies that this state belongs to a more general structure with an immense amount of other physics in it. • It also takes us beyond wave functions! The phenomenology can be explained before we write a single wave function. ...
... fermions carrying two vortices. • It clarifies that this state belongs to a more general structure with an immense amount of other physics in it. • It also takes us beyond wave functions! The phenomenology can be explained before we write a single wave function. ...
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).