User David Roberts

13 votes

1 answer

385 views

TQFT's as effective theories of the groundstate subspace

asked Feb 27, 2016 at 7:00

8 votes

1 answer

979 views

What is the physical relevance of the classical limit to a quantum field theory?

asked Apr 3, 2016 at 4:29

6 votes

1 answer

278 views

Zero modes $a_j\sim e^{-\kappa j}$ in a semi-infinite quantum Ising chain?

asked Oct 1, 2016 at 5:29

4 votes

0 answers

96 views

Product of Local Hamiltonians is Local

asked Feb 28, 2017 at 1:55

4 votes

1 answer

238 views

Free quantum field theories as fixed points of Wilsonian RG

asked Dec 29, 2017 at 17:51

4 votes

0 answers

114 views

Is there a classification scheme for linear classical field theories?

asked Apr 5, 2016 at 3:57

3 votes

1 answer

299 views

Geometric quantization of field theories and resulting statistics

asked Apr 9, 2016 at 0:57

3 votes

0 answers

480 views

Breakdown of the Legendre transform for the complex scalar field

asked Nov 14, 2017 at 4:29

2 votes

1 answer

661 views

Effective Hamiltonian Method used in Kitaev Chain

asked Aug 8, 2017 at 23:00

2 votes

0 answers

115 views

Why is stat mech involved in mean field theory?

asked Feb 7, 2016 at 21:58

2 votes

1 answer

662 views

Green's function in Hamiltonian vs. Path Integral QFT

asked Feb 20, 2016 at 6:06

2 votes

2 answers

2k views

Help with understanding Green's Functions

asked Feb 22, 2016 at 8:13

2 votes

1 answer

589 views

Second Quantization: The Identity Operator does not Commute?

asked Dec 4, 2015 at 21:44

2 votes

1 answer

351 views

How can a torus admit half a flux quantum, and why does a vortex induce an AB phase?

asked Dec 8, 2015 at 20:33

2 votes

1 answer

179 views

Feynman Path Integral as a Quantization Scheme

asked Dec 24, 2015 at 17:02

1 vote

0 answers

57 views

Quantization of KK Theory

asked Dec 24, 2015 at 20:27

1 vote

1 answer

211 views

Derivation of Aharonov Bohm effect for Quasiparticles

asked Dec 5, 2015 at 21:41

1 vote

3 answers

929 views

Why do degenerate normal modes appear as complex conjugate pairs?

asked Dec 9, 2013 at 23:29

1 vote

1 answer

68 views

Field strength is always closed?

asked Mar 24, 2015 at 2:52

1 vote

1 answer

218 views

Holonomic and Topological Quantum Computing [closed]

asked Feb 28, 2016 at 1:34

1 vote

0 answers

98 views

A Proto-theorem about superconductivity

asked Mar 2, 2016 at 5:15

1 vote

1 answer

136 views

Some questions about gauge theory

asked Mar 18, 2016 at 5:23

1 vote

0 answers

57 views

MFT Approximation for Dilute Bose Gas

asked Mar 26, 2016 at 15:11

1 vote

0 answers

249 views

Wick's Theorem for Calculating the Vacuum Functional

asked Mar 26, 2017 at 6:17

1 vote

0 answers

82 views

Some subtleties in quantizing a fermi field

asked Jun 14, 2016 at 22:11

1 vote

0 answers

54 views

How to compute the MPS representation for a sequence of asymptotically gapped quantum spin chains

asked Nov 30, 2016 at 11:00

1 vote

0 answers

87 views

How does one bound the growth of the support of local operators in the Transverse-Field Ising Chain?

asked Sep 13, 2017 at 19:14

0 votes

1 answer

92 views

Temperature independence in identical-row two-point functions of a 2D Ising model?

asked Nov 4, 2016 at 2:50

0 votes

1 answer

64 views

How do I extract the groundstate of a quadratic field theory?

asked Jun 12, 2016 at 1:17

0 votes

0 answers

53 views

"Geometric" symmetries

asked Dec 30, 2015 at 14:14

Stack Exchange Network

31 Questions

TQFT's as effective theories of the groundstate subspace

What is the physical relevance of the classical limit to a quantum field theory?

Zero modes $a_j\sim e^{-\kappa j}$ in a semi-infinite quantum Ising chain?

Product of Local Hamiltonians is Local

Free quantum field theories as fixed points of Wilsonian RG

Is there a classification scheme for linear classical field theories?

Geometric quantization of field theories and resulting statistics

Breakdown of the Legendre transform for the complex scalar field

Effective Hamiltonian Method used in Kitaev Chain

Why is stat mech involved in mean field theory?

Green's function in Hamiltonian vs. Path Integral QFT

Help with understanding Green's Functions

Second Quantization: The Identity Operator does not Commute?

How can a torus admit half a flux quantum, and why does a vortex induce an AB phase?

Feynman Path Integral as a Quantization Scheme

Quantization of KK Theory

Derivation of Aharonov Bohm effect for Quasiparticles

Why do degenerate normal modes appear as complex conjugate pairs?

Field strength is always closed?

Holonomic and Topological Quantum Computing [closed]

A Proto-theorem about superconductivity

Some questions about gauge theory

MFT Approximation for Dilute Bose Gas

Wick's Theorem for Calculating the Vacuum Functional

Some subtleties in quantizing a fermi field

How to compute the MPS representation for a sequence of asymptotically gapped quantum spin chains

How does one bound the growth of the support of local operators in the Transverse-Field Ising Chain?

Temperature independence in identical-row two-point functions of a 2D Ising model?

How do I extract the groundstate of a quadratic field theory?

"Geometric" symmetries