Quantum Gravity as Sum over Spacetimes
... such that the correlator O(xn )O(ym ) falls off exponentially like e−m ph |xn −ym | for g0 → g0c when |xn − ym |, but not |n − m|, is kept fixed in the limit g0 → g0c . Thus we have created a picture where the underlying lattice spacing goes to zero while the physical mass (or the correlation leng ...
... such that the correlator O(xn )O(ym ) falls off exponentially like e−m ph |xn −ym | for g0 → g0c when |xn − ym |, but not |n − m|, is kept fixed in the limit g0 → g0c . Thus we have created a picture where the underlying lattice spacing goes to zero while the physical mass (or the correlation leng ...
- Quantum Optics and Spectroscopy
... calculations. In quantum physics this is known as decoherence which is responsible for the fact that we do not experience quantum mechanical effects in macroscopic objects. It is clear, that a realistic system can never be shielded perfectly from the environment and thus at least a small amount of n ...
... calculations. In quantum physics this is known as decoherence which is responsible for the fact that we do not experience quantum mechanical effects in macroscopic objects. It is clear, that a realistic system can never be shielded perfectly from the environment and thus at least a small amount of n ...
Hybrid opto-mechanical systems with nitrogen
... Nobel prize ”for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems” [1]. In his lab, the motion and the electron spin of trapped ions couple with each other. Therefore, the motional degree of freedom of the trapped ions can be coherently manipu ...
... Nobel prize ”for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems” [1]. In his lab, the motion and the electron spin of trapped ions couple with each other. Therefore, the motional degree of freedom of the trapped ions can be coherently manipu ...
pdf - ISI Foundation
... integer matrices also suffice, and these can be embedded in five-qubit operators, which gives the second part of the result. We have so far been considering decidability in tensors without restriction on the components. It turns out that many decidability results can be obtained when considering the ...
... integer matrices also suffice, and these can be embedded in five-qubit operators, which gives the second part of the result. We have so far been considering decidability in tensors without restriction on the components. It turns out that many decidability results can be obtained when considering the ...
The Quantum Hall Effect: Novel Excitations and Broken Symmetries
... In the so-called integer quantum Hall effect (IQHE) discovered by von Klitzing in 1980, the quantum number ν is a simple integer with a precision of about 10−10 and an absolute accuracy of about 10−8 (both being limited by our ability to do resistance metrology). In 1982, Tsui, Störmer and Gossard ...
... In the so-called integer quantum Hall effect (IQHE) discovered by von Klitzing in 1980, the quantum number ν is a simple integer with a precision of about 10−10 and an absolute accuracy of about 10−8 (both being limited by our ability to do resistance metrology). In 1982, Tsui, Störmer and Gossard ...
ABSTRACT RANDOM ROUTING AND CONCENTRATION IN QUANTUM SWITCHING NETWORKS
... can route all n! permutations using O(n log3 n) gates. Switching network configurations suitable for quantum networks have also been identified [22]. Quantum computation exploits the ability for a single quantum bit, a qubit, which can be implemented by the polarization states of a photon or the spi ...
... can route all n! permutations using O(n log3 n) gates. Switching network configurations suitable for quantum networks have also been identified [22]. Quantum computation exploits the ability for a single quantum bit, a qubit, which can be implemented by the polarization states of a photon or the spi ...
Quantum groups and integrable lattice models UMN Math Physics Seminar
... an explicit formula for Z = ZM,N , its thermodynamical limit lim ZM,N or thermodynamical limit per site ...
... an explicit formula for Z = ZM,N , its thermodynamical limit lim ZM,N or thermodynamical limit per site ...
- Quantum Optics Group
... kinds of quantum manipulations of single photons, as has been demonstrated in a series of experiments mainly performed by Sciarrino and co-workers in Roma’s quantum optics group, which will be reviewed below. In particular, as we will show, the combined use of polarization and OAM for accessing a hi ...
... kinds of quantum manipulations of single photons, as has been demonstrated in a series of experiments mainly performed by Sciarrino and co-workers in Roma’s quantum optics group, which will be reviewed below. In particular, as we will show, the combined use of polarization and OAM for accessing a hi ...
Field Theory on Curved Noncommutative Spacetimes
... The pairing hv, ωi? with the vector field on the left is defined analogously. Another ingredient for formulating NC field theories is a background spacetime metric field g. To define it we introduce the ?-tensor product ⊗? , which can be constructed in the canonical way [7] by first acting with the ...
... The pairing hv, ωi? with the vector field on the left is defined analogously. Another ingredient for formulating NC field theories is a background spacetime metric field g. To define it we introduce the ?-tensor product ⊗? , which can be constructed in the canonical way [7] by first acting with the ...
Existence of an Ericson regime in stretched helium
... mixed phase space @1#. This means that not all of the quantum states of the helium atom can be grouped into regular sequences of states and we should be prepared to discover new quantum dynamical regimes in the helium atom. One consequence of a mixed phase space is the existence of regular islands i ...
... mixed phase space @1#. This means that not all of the quantum states of the helium atom can be grouped into regular sequences of states and we should be prepared to discover new quantum dynamical regimes in the helium atom. One consequence of a mixed phase space is the existence of regular islands i ...
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).