scholarly journals Quantum statistical correlations in thermal field theories: Boundary effective theory

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
A. Bessa ◽  
F. T. Brandt ◽  
C. A. A. de Carvalho ◽  
E. S. Fraga
Keyword(s):  
Thermal Field ◽  
Field Theories ◽  
Effective Theory ◽  
Statistical Correlations ◽  
Quantum Statistical

scholarly journals The Reeh–Schlieder property for thermal field theories

2000 ◽  
Vol 41 (4) ◽  
pp. 1745-1754 ◽  
Author(s):  
Christian D. Jäkel
Keyword(s):  
Thermal Field ◽  
Field Theories

scholarly journals Dipolar quantization and the infinite circumference limit of two-dimensional conformal field theories

2016 ◽  
Vol 31 (32) ◽  
pp. 1650170 ◽  
Author(s):  
Nobuyuki Ishibashi ◽  
Tsukasa Tada
Keyword(s):  
Virasoro Algebra ◽  
Field Theories ◽  
Inner Product ◽  
Two Dimensional ◽  
Conformal Field Theories ◽  
Conformal Field ◽  
Vacuum States ◽  
Quantum Statistical ◽  
Statistical Systems ◽  
Continuous Index

Elaborating on our previous presentation, where the term dipolar quantization was introduced, we argue here that adopting [Formula: see text] as the Hamiltonian instead of [Formula: see text] yields an infinite circumference limit in two-dimensional conformal field theory. The new Hamiltonian leads to dipolar quantization instead of radial quantization. As a result, the new theory exhibits a continuous and strongly degenerated spectrum in addition to the Virasoro algebra with a continuous index. Its Hilbert space exhibits a different inner product than that obtained in the original theory. The idiosyncrasy of this particular Hamiltonian is its relation to the so-called sine-square deformation, which is found in the study of a certain class of quantum statistical systems. The appearance of the infinite circumference explains why the vacuum states of sine-square deformed systems are coincident with those of the respective closed-boundary systems.

scholarly journals Predictive physics of inflation and grand unification for and from the CMB observations

2020 ◽  
Vol 35 (17) ◽  
pp. 2030008
Author(s):  
Norma G. Sanchez
Keyword(s):  
Effective Field Theories ◽  
Particle Physics ◽  
Effective Field ◽  
Energy Scale ◽  
Field Theories ◽  
Effective Theory ◽  
Grand Unification ◽  
Physical Approach ◽  
New Learning ◽  
The Future

This paper focuses on realistic and timely situations of inflation in connection with the CMB, gravitational and particle physics, adding interdisciplinarity and unification values within a strongly predictive physical approach. The formulation of inflation in the Ginsburg–Landau approach developed by de Vega and Sanchez1 and by Boyanovsky, de Vega, Sanchez and Destri[Formula: see text] clarifies and places inflation in the setting of the effective field theories of particle physics. In addition, it sets up a clean way to directly confront the inflationary predictions with the available and forthcoming CMB data and select a definitive model. All CMB[Formula: see text]+[Formula: see text]LSS data until now show how powerful is the Ginsburg–Landau effective theory of inflation in predicting observables in agreement with observations, including the inflation energy scale and the inflaton potential, and which has much more to provide in the future. It paves the way to discoveries, new learning and understanding.

Real-time fermion thermal field theories

1987 ◽  
Vol 35 (8) ◽  
pp. 2415-2422 ◽  
Author(s):  
Kenneth L. Kowalski
Keyword(s):  
Real Time ◽  
Thermal Field ◽  
Field Theories

GENERALIZED CONTROLLED DENSE CODING WITH MAXIMALLY ENTANGLED MULTIQUBIT STATES

2010 ◽  
Vol 08 (06) ◽  
pp. 947-960
Author(s):  
ATUL KUMAR ◽  
MANGALA SUNDER KRISHNAN
Keyword(s):  
Quantum Channel ◽  
Information Transfer ◽  
Communication Protocol ◽  
Dense Coding ◽  
Controlled Dense Coding ◽  
Statistical Correlations ◽  
Measurement Results ◽  
Quantum Statistical ◽  
Average Information ◽  
Qubit States

Controlled dense coding which uses different five-qubit entangled systems is described in this article. Using a criterion based on quantum-statistical correlations to define the extent of entanglement, five-qubit states are shown to have genuine entanglement. Different schemes which are easily implementable experimentally for a receiver to decode the message from a sender are described. The importance of representation of a quantum channel and distribution of qubits in a communication protocol are emphasized. It is observed that when a controller is involved it is desirable that measurement results are transmitted to the receiver and not to the sender for experimental convenience. In addition, a controlled dense coding protocol for average information transfer is given for arbitrary (2N + 1)-qubit entangled systems, using the above schemes.

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