36 How do I add 1+1 using a quantum computer? 2018-04-09T18:37:41.830

35 Why is it harder to build quantum computers than classical computers? 2018-06-10T12:34:51.797

31 How does a quantum computer do basic math at the hardware level? 2018-03-24T05:37:07.873

23 What is the argument that practical quantum computers cannot be built? 2018-04-06T16:35:16.583

20 Why do optical quantum computers not have to be kept near absolute zero while superconducting quantum computers do? 2018-03-14T21:54:25.037

18 What cryogenic systems are suitable for superconducting qubits? 2018-03-12T19:53:58.863

18 How are quantum gates implemented in reality? 2018-03-23T11:12:37.637

16 Which subatomic particle does each company use in quantum computing? 2020-02-27T19:32:23.020

15 Is Google's 72 qubit device better than D-Wave's machines, which feature more than 2000 qubits? 2018-03-28T23:25:26.580

14 Scalability of ion trap quantum computers 2018-03-28T22:32:44.897

13 Why must quantum computers be kept near absolute zero? 2018-03-14T14:58:46.433

13 How are quantum gates realised, in terms of the dynamic? 2018-03-22T11:54:59.120

13 How power-efficient are quantum computers? 2018-03-30T04:18:50.047

13 How to store qubits while preserving Heisenberg's uncertainty principle? 2018-04-01T12:27:24.017

12 Do real commercial quantum computers exist? 2018-03-28T06:19:29.607

12 Is the "Quantum Volume" a fair metric for future, elaborate, high value quantum computations? 2018-08-08T11:06:24.460

11 What kinds of ions do trapped ion quantum computers use? 2018-03-29T13:53:17.543

11 How many operations can a quantum computer perform per second? 2018-06-20T09:32:50.140

11 Does the D-Wave 2000Q satisfy DiVincenzo's criteria? 2018-10-06T15:57:28.850

10 Who built the first quantum computer using at least two qubits? 2018-03-24T20:08:35.513

10 Is it important for a quantum computer to be shielded by the magnetic field? 2018-03-29T04:49:20.043

10 What countries are leading this "Global Quantum Computing Race"? 2018-03-29T19:22:49.070

10 What real quantum computers are available for students to use? 2018-04-02T21:14:13.097

9 Allowed CNOT gates for IBM Q 5 quantum computer 2018-05-30T14:58:46.317

9 What is D-Wave's "Pegasus" architecture? 2018-06-29T20:33:12.960

9 What does it mean for a quantum computer to have $X$ qubits? 2018-08-17T17:26:47.417

9 Current limits on Grover search space 2019-02-09T09:06:28.097

8 Dependency of architecture on hardware 2018-03-17T11:19:10.620

8 The process for transferring qubits between locations 2018-07-26T16:25:26.450

7 How much faster is “D-Wave Two” compared to its predecessor? 2018-03-12T20:19:27.003

7 How to explain in layman’s terms the significance of the difference of qubits of the D-Wave and IBM QX? 2018-03-22T21:35:42.920

7 When can we expect the first (universal) quantum computer being able to do something useful outside the academic world? 2018-06-20T09:50:18.070

7 Are we certain that quantum computers are more efficient than classical computers can be built? 2018-06-24T14:31:19.543

7 Does a fully working quantum computer solve a specific problem at varying speeds every time? 2018-07-12T12:22:53.143

7 Is there any company that backs and implements diamond vacancy quantum computers? 2019-01-27T23:31:36.437

7 How to implement a while loop in a quantum computer? 2020-07-01T17:06:34.860

6 Can quantum computers design quantum computers autonomously better than other methods? 2018-03-23T04:54:39.233

6 Do the latest D-Wave computers use Helium compounds for cooling? 2018-03-30T14:12:09.133

6 Are quantum simulators like Microsoft Q# actually using quantum mechanics in their chips? 2018-08-10T02:24:31.147

6 Transmons and cooper pair box qubits: two islands or a single island and a reservoir 2018-08-29T15:25:25.843

6 How scalable are quantum computers when measurement operations are considered? 2018-09-05T13:11:51.917

6 Randomness from deterministic machine 2018-09-08T14:49:17.523

6 In D-Wave's universal quantum computer, why does the YY term have to be driven along with the linear X term? 2018-09-30T23:33:02.013

6 Is there any single-logical-qubit physical device out there as of end 2018? 2018-11-08T07:47:52.543

6 What are the main obstacles to overcome to build silicon-photonic quantum computers? 2019-05-23T17:45:17.323

6 Physical qubit of optical quantum computer 2019-05-28T18:27:47.837

6 Calculating power of a quantum computer --- RSA 2019-06-17T18:01:36.700

6 Physical implementation of gates on IBM Q 2020-03-17T12:36:05.123

6 What are examples of quantum computing platforms availble for free (other than IBM Q)? 2020-04-28T22:23:35.497

6 How to decide which quantum device to use if a quantum algorithm is given? 2020-05-25T12:47:59.367

6 Is there any legitimate information about Microsoft quantum hardware? 2020-05-27T13:06:28.783

6 Does this experimental discovery of anyons enables the topological quantum computer (e.g. Microsoft) to become a reality? 2020-09-06T01:52:41.373

5 Do we really know how a universal quantum computer can be used to revolutionize the design of new drugs or materials? 2018-09-03T11:35:23.570

5 Why use U2 and U1 gate in IBM quantum computers? 2019-09-01T17:28:30.573

5 What are the physical reasons behind noise/errors in quantum computers? 2019-09-06T01:11:03.800

5 Why are multiple quantum gates, in a quantum circuit, used? 2019-12-02T13:34:15.710

5 Are single photons necessary for this quantum autoencoder implementation? 2020-03-15T11:26:49.593

5 What are some good resources for learning about photonic qubits? 2020-03-22T15:36:42.433

5 Why isn't NV-center-based quantum computing mainstream? 2020-09-02T14:40:53.833

5 How do we realise photonic gates? 2020-11-28T16:41:57.540

4 Processing density capabilities in a quantum processor 2018-04-01T04:26:16.580

4 Is running a large random brute force on quantum computer possible at the moment? 2018-07-05T15:35:14.193

4 D-Wave systems and IBM Q System One 2019-01-31T13:18:33.753

4 Is generating usable entanglement difficult? 2019-05-06T15:23:02.890

4 How are witness operators physically implemented? 2019-05-14T07:35:55.500

4 How is a physical qubit measured and how is the result interpreted? 2019-05-18T13:36:52.010

4 Looking for papers that are pessimistic about the feasibility of a quantum computer 2019-08-23T13:34:04.857

4 What is the state of the art on Quantum Random Access Memories? 2020-01-04T12:54:40.760

4 Moore's law for quantum computers 2020-05-31T06:58:23.373

4 How to build a quantum computer in your house? 2020-06-05T09:30:29.937

4 Why attenuator and not filters for QC driving line 2020-07-15T22:50:38.083

4 Form and effect of the intrinsic Hamiltonian on the IBM machines 2020-07-30T13:08:20.487

4 Why are there such different UGate and U3Gate implementations in the Qiskit documentation? 2020-08-20T07:28:58.113

4 Is there a straightforward way to calculate the quantum volume for simple systems? 2020-10-01T20:31:32.540

4 Topology graphs of IBM's quantum computers 2021-01-08T08:25:38.437

4 Up to date overview of experimental approaches to quantum computing 2021-01-23T20:10:13.327

4 Is it possible to have access to real quantum computers that have more than 15 qubits for my master thesis? 2021-01-28T13:04:16.063

3 What are some popular myths or common misconceptions about quantum computing? 2018-03-22T12:19:53.040

3 Why D-Wave 2000Q requires such a low pressure? 2018-03-30T09:01:15.557

3 Are qubits the only elements required to build a quantum computer? 2018-09-11T10:07:24.300

3 CNOT gate - control qubit is in superposition 2018-12-09T17:38:16.173

3 Does self-induced collapse limit the size of a quantum computer? 2019-01-11T12:16:26.200

3 Can one make NV centred type qubits from analogus materials in the periodic table? 2019-02-18T10:43:03.727

3 How do frequency-tunable microwave resonators work? 2019-03-06T11:59:46.073

3 Counting channel uses of the lossy bosonic channel or definition of channel uses 2019-05-08T09:50:26.760

3 IBM's quantum computing capabilities — entangled 18-qubit GHZ states and high coherence times 2019-05-13T12:09:27.927

3 How to perform quantum logic gates on plasmons? 2019-06-23T07:16:52.270

3 What is the difference between a cooper pair box and a transmon qubit? 2019-08-23T16:41:49.427

3 Where are the physical gates in the Google processor? 2020-01-21T12:21:52.230

3 The Clock Speed for the Quantum Computers 2020-02-23T22:34:19.737

3 $H = e^{i\pi/4} \sqrt{iNOT}$? 2020-04-06T16:29:46.827

3 Why don't quantum computing scientists build two 50-qubit processors and connect them in parallel instead of building one 100-qubit processor? 2020-05-10T17:09:16.450

3 Exponential Growth of Noise in Quantum Computers 2020-05-23T17:03:12.920

3 Do all physical architectures for quantum computers use the same universal gate sets? 2020-06-11T11:49:44.800

3 Gate characteristics of different platforms 2020-11-09T11:25:21.283

3 How are the IBM's and Google's Hadamard gates fabricated and operated? 2020-11-11T01:25:27.917

3 Are there any detailed designs for Quantum Computing hardware? 2020-12-13T21:11:34.650

2 Is it possible to make our own quantum computer? If yes, what will it take? 2018-07-19T18:38:05.353

2 Is it possible to purchase quantum computing hardware? 2018-07-23T16:16:38.993