User chrysaor4

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2

answers

4k

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What is the difference between transmon and Xmon qubits?

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20

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526

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Can adiabatic quantum computing be faster than Grover's algorithm?

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Alternative to Bloch sphere to represent a single qubit

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16

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525

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Why do error correction protocols only work when the error rates are already significantly low to begin with?

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Dec 23 '18 at 14:14 Sanchayan Dutta 15k

14

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3

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What are magic states?

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May 28 at 18:05 user1271772 10.5k

10

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Are circuits with more than 1000 gates common?

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315

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May 16 '18 at 0:56 Rob 2,130

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Are three POVM measurements on a single qubit physically realizable?

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Mar 12 at 19:45 glS♦ 14.2k

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147

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What is the relation between POVMs and observables (as Hermitian operators)?

measurement notation povm

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185

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Can a merchant who accepts a knot-based quantum coin mint her own knot-based coin?

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Dec 10 '18 at 0:06 Mark S 5,129

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3

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Why does quantum computing generally use matrix formulation of quantum mechanics rather than a continuous variable formulation?

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524

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Nov 8 '19 at 12:47 glS♦ 14.2k

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452

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How to define a quantum channel for the partial trace?

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4

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2

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541

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Do the Kraus operators of a CPTP channel need to be orthogonal?

quantum-operation kraus-representation

Jun 29 at 22:49 glS♦ 14.2k

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1

answer

49

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Understanding the quantum circuit for the quantum adder Toffoli gate

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Mar 30 at 17:48 glS♦ 14.2k

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Determining whether there exists an equivalent set of unitary Kraus operators

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3

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1

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360

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What is the difference between Qiskit execute and the IBMQJobManager?

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3

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1

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416

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How to plot histogram or Bloch sphere for multiple circuits?

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Dec 16 '19 at 14:12 Sanchayan Dutta 15k

3

votes

0

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21

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Clean way of approximating an oscillator by a qubit

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Apr 26 at 12:17 StarBucK 811

3

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1

answer

71

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Equivalence of two ways to recover a map from its Choi state

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Jan 31 at 20:50 Adam Zalcman 7,373

2

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1

answer

159

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Direct derivation of the Kraus representation from the natural representation, using SVD

mathematics quantum-operation kraus-representation

Jul 5 at 8:24 glS♦ 14.2k

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Fault-tolerant qudit computation: advantage? [closed]

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0

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Can you make anyons in 3 dimensions using rings?

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106

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Permutation covariant channels and their Stinespring dilations

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Why the chi-matrix fidelity of the process is the fidelity of the chi-matrix noise map

quantum-operation quantum-process-tomography

Aug 24 '20 at 9:26 glS♦ 14.2k

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73

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How does the CPTP constraint reflect on the matrix representation of a qubit channel in the Pauli basis?

quantum-state mathematics quantum-operation bloch-sphere

Nov 25 at 0:12 JSdJ 4,000

0

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1

answer

118

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Is there an algorithm that can decide if a state is a mixed state or a pure state?

quantum-state algorithm density-matrix

2d ago Learner 25

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What is the difference between transmon and Xmon qubits?

Can adiabatic quantum computing be faster than Grover's algorithm?

How do I build a gate from a matrix on Qiskit?

Alternative to Bloch sphere to represent a single qubit

Why do error correction protocols only work when the error rates are already significantly low to begin with?

What are magic states?

Are circuits with more than 1000 gates common?

Requirements for Achieving a Quantum Speedup

Are three POVM measurements on a single qubit physically realizable?

Understanding classical vs. quantum channel capacities

What is the relation between POVMs and observables (as Hermitian operators)?

Can a merchant who accepts a knot-based quantum coin mint her own knot-based coin?

Why does quantum computing generally use matrix formulation of quantum mechanics rather than a continuous variable formulation?

Intuitive role of the polar decomposition in proof of Uhlmann's theorem for fidelity

How to define a quantum channel for the partial trace?

Do the Kraus operators of a CPTP channel need to be orthogonal?

Understanding the quantum circuit for the quantum adder Toffoli gate

Determining whether there exists an equivalent set of unitary Kraus operators

What is the difference between Qiskit execute and the IBMQJobManager?

How to plot histogram or Bloch sphere for multiple circuits?

Clean way of approximating an oscillator by a qubit

Equivalence of two ways to recover a map from its Choi state

Direct derivation of the Kraus representation from the natural representation, using SVD

Fault-tolerant qudit computation: advantage? [closed]

Can you make anyons in 3 dimensions using rings?

Permutation covariant channels and their Stinespring dilations

Why the chi-matrix fidelity of the process is the fidelity of the chi-matrix noise map

How does the CPTP constraint reflect on the matrix representation of a qubit channel in the Pauli basis?

Is there an algorithm that can decide if a state is a mixed state or a pure state?