Tag: entanglement

28 How do I show that a two-qubit state is an entangled state? 2018-06-07T23:14:06.640

21 Is entanglement transitive? 2018-05-22T16:22:56.337

16 What does it mean for two qubits to be entangled? 2018-04-07T10:41:55.107

15 Is it true to say that one qubit in an entangled state can instantaneously affect all others? 2018-05-11T14:47:33.197

13 Is entanglement necessary for quantum computation? 2018-07-09T06:45:15.050

12 Using a fractional number of classical bits within quantum teleportation 2018-05-07T15:19:40.753

12 General construction of $W_n$-state 2018-10-05T09:18:25.400

12 Does quantum computing already possess the level of abstraction to be explicable even without knowledge of physics? 2020-02-03T16:01:40.850

11 What is quantum entanglement, and what role does it play in quantum error correction? 2018-04-01T09:53:46.993

11 When was the first use of the word Entanglement? 2018-05-18T19:46:48.373

10 What happens if two separately entangled qubits are passed through a C-NOT gate? 2018-04-19T13:36:02.280

10 Are there connections between long-range entanglement and topological quantum computation? 2018-05-15T08:13:51.020

10 How to implement the 4 Bell states on the IBM Q (composer)? 2018-06-07T15:03:24.000

10 CNOT Gate on Entangled Qubits 2018-07-16T16:17:48.657

10 Why is an entangled qubit shown at the origin of a Bloch sphere? 2019-01-08T22:30:58.257

10 Why isn't there a contradiction between the existence of CNOT gate/entanglement and the no-cloning theorem? 2019-07-30T22:54:58.067

9 Decoherence of spin-entangled triplet-pair states in the solid state: local vs delocalized vibrations 2018-04-13T16:17:00.647

9 How to keep track of entanglements when emulating quantum computation? 2018-04-28T09:40:25.543

9 What is the applicability of quantum network coding? 2018-06-12T23:55:01.523

9 Does local Clifford equivalence have a direct graphical representation for qudit graph states of non-prime dimension? 2018-07-01T13:34:14.123

9 What are the possible ways to visualise large, entangled states? 2018-07-06T14:31:41.693

9 Why do we have to uncompute rather than simply set registers to zero? 2019-01-18T15:21:33.640

9 Does higher channel fidelity imply higher entanglement fidelity? 2019-12-20T16:28:54.260

9 How can one imagine entanglement in a non-mathematical way? 2021-01-14T00:19:00.727

8 Entanglement transfer of spin-entangled triplet-pair states between flying qubits and stationary qubits 2018-04-13T16:14:55.530

8 What is the maximum separation between two entangled qubits that has been achieved experimentally? 2018-04-19T11:06:14.907

8 Entanglement in Shor's algorithm 2018-05-21T23:05:07.483

8 How to show that an n-level system is entangled? 2018-06-21T08:03:09.517

8 Estimate/determine Bures separability probabilities making use of corresponding Hilbert-Schmidt probabilities 2018-07-13T22:30:05.923

8 Can two states with the same entanglement be transformed into each other using local unitaries? 2018-08-21T08:13:06.777

8 Relation between quantum entanglement and quantum state complexity 2018-10-29T15:02:53.143

8 What does "bipartite" mean? 2019-05-04T09:08:55.987

8 Will two entangled qubits be affected by gravity? 2020-04-28T10:14:42.520

7 Markov Chain expressed in Density Matrix formalism 2018-04-23T20:55:01.630

7 References examining Bell inequality violations at large distances 2018-05-27T05:18:24.697

7 When you act on a multi-qubit system with a 2-qubit gate, what happens to the third qubit? 2018-07-08T18:14:05.187

7 Is entanglement an operation or a stored state for qubits? 2018-07-28T12:37:39.413

7 Is there a relation between the factorisation of the joint conditional probability distribution and Bell inequality? 2018-09-08T12:21:21.077

7 Controlling high-dimensional Hilbert spaces with a single qubit 2018-11-10T10:53:36.730

7 Entanglement-assisted hashing bound for asymmetric depolarizing channels 2019-09-30T15:10:18.837

7 Query on Reduced Graph States 2019-11-08T08:57:35.917

6 How does evolving a two-qubit state through a CNOT gate entangle them? 2018-03-21T10:14:14.440

6 What are the current solutions to generate entangled qubits in the solid state? 2018-04-15T10:50:59.103

6 Upper Bounds for QMA Quantum Merlin Arthur, and QMA(k) 2018-04-21T09:14:33.290

6 How to check if 2 qubits are entangled? 2018-06-10T16:39:21.193

6 Are Absolutely Maximally Entangled states maximally entangled under all entanglement monotones? 2018-06-21T13:46:38.737

6 How is entanglement achieved between two particles in quantum computing? 2018-07-08T14:55:51.033

6 Rotationally invariant maximally entangled states in higher dimensions 2018-10-05T05:47:57.757

6 Relating min-entropy with conditional entropy 2018-10-09T21:13:55.337

6 Construction of optimal ensemble to show quantum steerability 2019-02-12T13:10:39.407

6 Why do we use complex-conjugate instead of complex-conjugate-transpose when calculating the concurrence? 2019-05-24T00:58:38.740

6 What is the definition of Bell state on a n-qubit system? 2019-06-07T17:49:36.137

6 Non maximally entangled states for QKD 2019-08-10T10:02:45.103

6 What does W stand for in the W entangled state? 2019-10-20T18:40:50.500

6 How to prepare mixed states on a quantum computer? 2020-02-13T15:28:48.693

6 Can $|\Psi\rangle\simeq\sum_k |u_k\rangle|v_k\rangle$ be maximally entangled even if $\{|u_k\rangle\}_k,\{|v_k\rangle\}_k$ are not orthonormal? 2020-09-30T00:19:52.487

6 Difference between Bell's inequality and CHSH 2020-11-04T21:53:40.973

5 Entanglement distillation by local operations and post-selection using one entanglement pair 2018-05-13T15:17:10.763

5 Compact encoding of Boolean formula as oracle 2018-07-10T08:19:05.793

5 Photon Entanglement using SPDC 2018-09-03T17:58:56.077

5 Entanglement state preparation by using amplitude values 2018-09-26T14:35:47.727

5 Protocol for entaglement swapping 2018-10-03T01:07:27.773

5 How can blackholes be fast information scramblers? 2018-10-29T16:20:34.637

5 Maximally mixed states for more than 1 qubit 2018-11-01T16:33:20.187

5 Quantum teleportation with "noisy" entangled state 2019-04-17T15:16:29.680

5 Superoperator cannot increase relative entropy 2019-05-05T21:23:27.183

5 What is the motivation for Weyl matrices in quantum information theory? 2019-06-14T06:14:19.340

5 Equivalent determinant condition for Peres-Horodecki criteria 2019-06-15T05:45:04.067

5 Motivation for the definition of k-distillability 2019-06-18T13:44:28.427

5 In what ways can qubits be used for applications that do not require entanglement? 2019-08-01T02:04:19.823

5 How to check if a two-qubit gate is entangling? 2019-10-19T21:22:40.797

5 How to measure entanglement in an algorithm? 2019-10-21T09:45:57.923

5 Entanglement and distributed consensus 2019-11-01T20:41:28.377

5 Why does measuring one qubit after the other in this entangled system alter the result? 2019-12-07T19:14:44.567

5 Does the Quantum Fourier Transform (QFT) preserve entanglement? 2020-02-19T16:15:33.640

5 Is communication possible with entanglement? 2020-07-16T21:58:23.633

5 Is the square root of SWAP gate "maximally entangling"? 2020-09-02T14:08:15.273

5 What is the difference between "entanglement distillation" and "entanglement purification"? 2021-02-07T08:49:19.643

4 Is there any classical analogy for quantum entanglement? 2018-04-01T14:34:13.610

4 Local operations and classical communication (LOCC) on quantum system 2018-04-17T19:39:44.590

4 What are the differences between "$n$-th level e-bits" and "$n$-th level qunits"? 2018-06-21T02:59:10.223

4 How to calculate the number of ebits in a graph state? 2018-09-12T08:44:44.467

4 Applying CNOT with local operations and two EPR pairs 2018-10-04T21:55:14.800

4 Suggest, partly based upon limited numerical results, possible “elegant” exact formulas for Bures two-qubit separability probability 2018-10-10T21:49:55.737

4 Quantum teleportation: second classical bit for removing entanglement? 2018-10-18T02:01:23.727

4 Does entanglement correlate qubits a $100\%$ of the time? 2018-10-20T13:24:02.820

4 BB84 attack with entangled qubits example 2018-10-29T16:21:40.073

4 How to analyze highly entangled quantum circuits? 2018-11-22T20:49:23.440

4 Grover's algorithm with W-state 2018-12-14T21:24:01.637

4 Defining entanglement for systems with more than two qubits 2019-01-15T09:00:18.653

4 Why is $P(1,2)_{\text{same}} = \frac{1}{4}$ and not $\frac{1}{2}$ in Preskill's Bell experiment? 2019-02-03T11:21:51.520

4 Connection between the definitions of concurrence for a two-qubit states 2019-02-18T11:43:28.083

4 For 2x2 and 2x3 systems, is the partial transpose the only positive but not CP operation? 2019-02-18T13:15:38.507

4 Convex Combination of Separable States 2019-02-27T09:23:21.687

4 Homeomorphism or stereographic projection corresponding to the set of mixed states within the Bloch sphere 2019-03-02T23:39:45.080

4 What do entanglement cost and distillable entanglement have to do with measuring entanglement? 2019-03-05T22:58:54.167

4 How is the expression for the optimal entanglement witness derived? 2019-04-02T10:50:16.107

4 Are X-state separability and PPT- probabilities the same for the two-qubit, qubit-qutrit, two-qutrit, etc. states? 2019-04-06T16:40:35.753

4 Finding separable decompositions of bipartite X-states using the methodology of Li and Qiao 2019-04-22T18:59:36.443