A quantum point contact for ultra cold Fermions
... Fermi gas of atoms [1]. We employ ultra-high resolution lithography to shape light potentials that realize either a quantum point contact or a quantum wire for atoms. These constrictions are imprinted on a quasi two-dimensional ballistic channel connecting two adjustable reservoirs of quantum degene ...
... Fermi gas of atoms [1]. We employ ultra-high resolution lithography to shape light potentials that realize either a quantum point contact or a quantum wire for atoms. These constrictions are imprinted on a quasi two-dimensional ballistic channel connecting two adjustable reservoirs of quantum degene ...
Lecture 4
... What does that mean? There might be a deeper „classical“ theory that allows to eliminate the probabilistic predictions of quantum mechanics by referring to „hidden parameters“ The state 1/21/2 (|00i+|11i) on two spatially separated qubits exhibits „spooky actions at a distance“: when measured it beh ...
... What does that mean? There might be a deeper „classical“ theory that allows to eliminate the probabilistic predictions of quantum mechanics by referring to „hidden parameters“ The state 1/21/2 (|00i+|11i) on two spatially separated qubits exhibits „spooky actions at a distance“: when measured it beh ...
Quantum Information (QI) - BYU Physics and Astronomy
... What will we do? CP, HW, IP, MT, F How do you communicate? Sources for QI? (Linear Algebra prerequisite) What is Linear Algebra? ...
... What will we do? CP, HW, IP, MT, F How do you communicate? Sources for QI? (Linear Algebra prerequisite) What is Linear Algebra? ...
Simple Harmonic Oscillator
... of Q vs U states (via public channel). Keep only cases where they randomly made the same choice (in which case the Bob should get the digit Alice sent, barring interference). Check subsample of digits for interference (Eve or bad transmission). ...
... of Q vs U states (via public channel). Keep only cases where they randomly made the same choice (in which case the Bob should get the digit Alice sent, barring interference). Check subsample of digits for interference (Eve or bad transmission). ...
Department of Physics and Physical Oceanography Sigma Pi Sigma INDUCTION
... fuzzy. We can no longer make predictions with certainty. Nature is intrinsically probabilistic. Objects have no clear position unless we look at them. Despite its strangeness, the theory of quantum mechanics has been passing all experimental tests and has been confirming various bizarre predictions. ...
... fuzzy. We can no longer make predictions with certainty. Nature is intrinsically probabilistic. Objects have no clear position unless we look at them. Despite its strangeness, the theory of quantum mechanics has been passing all experimental tests and has been confirming various bizarre predictions. ...
Chapter 01
... • David Deutsch used quantum mechanics to derive a stronger version. Any physical system can be simulated efficiently using a quantum computer. (the proof is ongoing). ...
... • David Deutsch used quantum mechanics to derive a stronger version. Any physical system can be simulated efficiently using a quantum computer. (the proof is ongoing). ...
qm2 - Michael Nielsen
... in which they are asked to deduce superfluidity from first principles. There is no doubt a special place in hell being reserved for me at this very moment for this mean trick, for the task is impossible. Superfluidity, like the fractional quantum Hall effect, is an emergent phenomenon – a low-energy ...
... in which they are asked to deduce superfluidity from first principles. There is no doubt a special place in hell being reserved for me at this very moment for this mean trick, for the task is impossible. Superfluidity, like the fractional quantum Hall effect, is an emergent phenomenon – a low-energy ...
review
... seen as acting on that particle (e.g. by collapsing a number of superimposed states); and in the case of entangled particles, such action must be on the entangled system as a whole. It thus appears that one particle of an entangled pair "knows" what measurement has been performed on the other, and w ...
... seen as acting on that particle (e.g. by collapsing a number of superimposed states); and in the case of entangled particles, such action must be on the entangled system as a whole. It thus appears that one particle of an entangled pair "knows" what measurement has been performed on the other, and w ...
Torres: Copenhagen Quantum Mechanics
... None of this could happen on the visible scale “it becomes important to remember that science is concerned only with observable things and that we can observe an object only by letting it interact with some outside influence” -Dirac This interaction, observation, causes a disturbance on the quan ...
... None of this could happen on the visible scale “it becomes important to remember that science is concerned only with observable things and that we can observe an object only by letting it interact with some outside influence” -Dirac This interaction, observation, causes a disturbance on the quan ...
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).